SIST EN 50491-12-1:2018
(Main)General requirements for Home and Building Electronic Systems (HBES) and Building Automation and Control Systems (BACS) - Smart grid - Application specification - Interface and framework for customer - Part 12-1: Interface between the CEM and Home/Building Resource manager - General Requirements and Architecture
General requirements for Home and Building Electronic Systems (HBES) and Building Automation and Control Systems (BACS) - Smart grid - Application specification - Interface and framework for customer - Part 12-1: Interface between the CEM and Home/Building Resource manager - General Requirements and Architecture
This document specifies General Requirements and Architecture of an application layer interface between the
Customer Energy Manager (CEM) and Smart Devices (SD) operating within the smart grid premises-side
system (i.e. home or building but not industrial premises).
This document does not include requirements for:
– Safety;
– EMC;
– Data security; it is assumed that the underlying protocols will take the data security aspect into account;
NOTE Although data security is not within the scope of this standard, in Clause 4 some high-level design guidelines
for data security are provided.
– Special equipment (e.g. legacy heat pumps) with a direct physical connection to the grid, as such equipment
bypasses the CEM and is not HBES/BACS enabled (covered by other standards than the
EN 50491 series).
Allgemeine Anforderungen an die Elektrische Systemtechnik für Heim und Gebäude (ESHG) und an Systeme der Gebäudeautomation (GA) - Smart grid - Anwendungsspezifikaion - Struktur der Schnittstelle für Anwender - Teil 12-1: Schnittstelle zwischen CEM und Heim-/Gebäude-Ressourcenmanager - Allgemeine Anforderungen und Architektur
Exigences générales relatives aux systèmes électroniques pour les foyers domestiques et les bâtiments (HBES) et aux systèmes de gestion technique du bâtiment (SGTB) Réseau intelligent Spécification d'application Interface et cadre pour le client - Partie 12-1 : Interface entre le gestionnaire dénergie pour le client (CEM, Customer Energy Manager) et le gestionnaire de ressources pour foyers domestiques/ bâtiments. Exigences et Architecture générales
Splošne zahteve za stanovanjske in stavbne elektronske sisteme (HBES) in sisteme za nadzor in avtomatizacijo stavb (BACS) - Pametna omrežja - Aplikacijske specifikacije - Vmesnik in okvir za odjemalca - 12-1. del: Vmesnik med CEM in upravljalcem stanovanjskih in stavbnih virov - Splošne zahteve in arhitektura
Ta dokument določa splošne zahteve in arhitekturo za vmesnik aplikacijske ravni med upravljalcem energije odjemalcev (CEM) in pametnimi napravami (SD), ki delujejo v sistemu prostorov s pametnim omrežjem (tj. stanovanjih ali stavbah in ne industrijskih prostorih).
Ta dokument ne vključuje zahtev za:
– varnost;
– elektromagnetno združljivost (EMC);
– varnost podatkov; predpostavlja se, da bodo osnovni protokoli upoštevali vidik varnosti podatkov;
OPOMBA: Čeprav varnost podatkov ne spada na področje uporabe tega standarda, je v točki 4 navedenih nekaj pomembnih oblikovnih smernic o varnosti podatkov.
– posebno opremo (npr. podedovane toplotne črpalke) z neposredno fizično povezavo z omrežjem, ker takšna oprema zaobide upravljalca energije odjemalcev in ne omogoča uporabe s stanovanjskimi in stavbnimi elektronskimi sistemi (HBES) ali sistemi za nadzor in avtomatizacijo stavb (BACS) (obravnavani so v drugih standardih,
ki ne spadajo v skupino standardov EN 50491).
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 50491-12-1:2018
01-oktober-2018
Splošne zahteve za stanovanjske in stavbne elektronske sisteme (HBES) in
sisteme za nadzor in avtomatizacijo stavb (BACS) - Pametna omrežja - Aplikacijske
specifikacije - Vmesnik in okvir za odjemalca - 12-1. del: Vmesnik med CEM in
upravljalcem stanovanjskih in stavbnih virov - Splošne zahteve in arhitektura
General requirements for Home and Building Electronic Systems (HBES) and Building
Automation and Control Systems (BACS) - Smart grid - Application specification -
Interface and framework for customer - Part 12-1: Interface between the CEM and
Home/Building Resource manager - General Requirements and Architecture
Allgemeine Anforderungen an die Elektrische Systemtechnik für Heim und Gebäude
(ESHG) und an Systeme der Gebäudeautomation (GA) - Smart grid -
Anwendungsspezifikaion - Struktur der Schnittstelle für Anwender - Teil 12-1:
Schnittstelle zwischen CEM und Heim-/Gebäude-Ressourcenmanager - Allgemeine
Anforderungen und Architektur
Ta slovenski standard je istoveten z: EN 50491-12-1:2018
ICS:
35.240.67 Uporabniške rešitve IT v IT applications in building
gradbeništvu and construction industry
97.120 Avtomatske krmilne naprave Automatic controls for
za dom household use
SIST EN 50491-12-1:2018 en,fr
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
SIST EN 50491-12-1:2018
---------------------- Page: 2 ----------------------
SIST EN 50491-12-1:2018
EUROPEAN STANDARD EN 50491-12-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2018
ICS 97.120
English Version
General requirements for Home and Building Electronic Systems
(HBES) and Building Automation and Control Systems (BACS) -
Smart grid - Application specification - Interface and framework
for customer - Part 12-1: Interface between the CEM and
Home/Building Resource manager - General Requirements and
Architecture
Exigences générales relatives aux systèmes électroniques Allgemeine Anforderungen an die Elektrische
pour les foyers domestiques et les bâtiments (HBES) et aux Systemtechnik für Heim und Gebäude (ESHG) und an
systèmes de gestion technique du bâtiment (SGTB) Systeme der Gebäudeautomation (GA) - Smart grid -
Réseau intelligent Spécification d'application Interface et Anwendungsspezifikaion - Struktur der Schnittstelle für
cadre pour le client - Partie 12-1 : Interface entre le Anwender - Teil 12-1: Schnittstelle zwischen CEM und
gestionnaire d'énergie pour le client (CEM, Customer Heim-/Gebäude-Ressourcenmanager - Allgemeine
Energy Manager) et le gestionnaire de ressources pour Anforderungen und Architektur
foyers domestiques/ bâtiments. Exigences et Architecture
générales
This European Standard was approved by CENELEC on 2018-06-18. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden,
Switzerland, Turkey and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2018 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 50491-12-1:2018 E
---------------------- Page: 3 ----------------------
SIST EN 50491-12-1:2018
EN 50491-12-1:2018 (E)
Contents Page
European foreword 3
Introduction 4
1 Scope 5
2 Normative references 5
3 Terms, definitions and abbreviations 5
3.1 Terms and definitions 5
3.2 Abbreviations 8
4 Design considerations 8
4.1 General 8
4.2 Data security / privacy design guidelines 8
4.2.1 General 8
4.2.2 Data security / privacy on the smart grid side 8
4.2.3 Data security / privacy on premises side 9
4.2.4 Customer Energy Management System security 9
4.3 Device type agnostic energy management 9
4.4 Clock alignment 9
5 Background 9
6 Smart Grid premises side Architecture 12
6.1 General 12
6.2 Smart Grid Connection Point (SGCP) 14
6.3 Energy Management Gateway (EMG) 14
6.4 Interface S1 15
6.5 Customer Energy Manager (CEM) 15
6.6 Interface S2 16
6.7 Resource manager 16
6.8 HBES, SASS and Smart Devices 17
7 User Stories and Use Cases 17
7.1 Requirements for interoperability 17
7.2 Determining the requirements for Interface S2 18
7.3 Extensibility of S2 Requirements 18
Annex A (informative) Use Case example 19
Bibliography 22
2
---------------------- Page: 4 ----------------------
SIST EN 50491-12-1:2018
EN 50491-12-1:2018 (E)
European foreword
This document (EN 50491-12-1:2018) has been prepared by the Technical Committee CLC/TC 205, “Home
and Building Electronic Systems (HBES)”.
The following dates are fixed:
• latest date by which this document has (dop) 2019-06-18
to be implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national (dow) 2021-06-18
standards conflicting with this document
have to be withdrawn
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
This document has been prepared under a mandate given to CENELEC by the European Commission and the
European Free Trade Association.
EN 50491-12-1 is part of the EN 50491 series of European Standards - General requirements for Home and
Building Electronic Systems (HBES) and Building Automation and Control Systems (BACS) - which will
comprise the following parts:
— Part 1: General requirements;
— Part 2: Environmental Conditions;
— Part 3: Electrical Safety Requirements;
— Part 4-1: General functional safety requirements for products intended to be integrated in Building
Electronic Systems (HBES) and Building Automation and Control Systems (BACS);
— Part 5-1: EMC requirements, conditions and test set-up;
— Part 5-2: EMC requirements for HBES/BACS used in residential, commercial and light industry
environment;
— Part 5-3: EMC requirements for HBES/BACS used in industry environment
— Part 6-1: HBES installations - Installation and planning;
— Part 6-3: HBES installations - Assessment and definition of levels;
— Part 11: Smart Metering – Application Specification – Simple External Consumer Display;
— Part 12: Smart grid - Application specification - Interface and framework for customer;
— Part 12-1: Interface between the CEM and Home/Building Resource manager– General Requirements and
Architecture
— Future Part 12-2: Interface between the Home/Building CEM and Resource manager(s)– Data model and
messaging
— Future Part 12-3: Home/Building Customer Energy Manager (CEM)
— Future Part 12-4: Resource manager
3
---------------------- Page: 5 ----------------------
SIST EN 50491-12-1:2018
EN 50491-12-1:2018 (E)
Introduction
Traditional electricity networks make use of a primarily one-way flow of energy and communication from the
generator to the consumer via the transmission and distribution systems.
Although there is some monitoring and control of equipment in the transmission and distribution systems, there
is no communication with, or control of, consumer equipment. In particular, there is no means of requesting
short-term control of consumer equipment according to generation and/or transmission/distribution grid
conditions. Generation equipment is controlled according to the open-ended (uncontrolled) demand of the
consumer.
Today we are faced with an increase of energy consumption, this is directly connected to an increase of CO
2
production. The increased CO density in the atmosphere supports the climate warming of the earth.
2
One significant way to cope with the increased energy consumption without increasing the CO production is to
2
use more renewable energy resources.
Unfortunately, the available renewable energy supply is not aligned with the energy demand. To increase
efficiency, the energy demand should be aligned as much as possible with the available energy supply. To
reach this goal communication between the various equipment and systems of the stakeholders within the
energy field is necessary. This grid, exchanging information and energy between producers, consumers,
distributors and metering is known as the “Smart Grid”.
The EN 50491-12 series describes aspects of this smart grid that relate specifically to the premises
(home/building) part of the smart grid, including the common interface between equipment in the premises and
the smart grid.
4
---------------------- Page: 6 ----------------------
SIST EN 50491-12-1:2018
EN 50491-12-1:2018 (E)
1 Scope
This document specifies General Requirements and Architecture of an application layer interface between the
Customer Energy Manager (CEM) and Smart Devices (SD) operating within the smart grid premises-side
system (i.e. home or building but not industrial premises).
This document does not include requirements for:
– Safety;
– EMC;
– Data security; it is assumed that the underlying protocols will take the data security aspect into account;
NOTE Although data security is not within the scope of this standard, in Clause 4 some high-level design guidelines
for data security are provided.
– Special equipment (e.g. legacy heat pumps) with a direct physical connection to the grid, as such equipment
bypasses the CEM and is not HBES/BACS enabled (covered by other standards than the
EN 50491 series).
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes
requirements of this document. For dated references, only the edition cited applies. For undated references, the
latest edition of the referenced document (including any amendments) applies.
EN 50491-12, (all parts), General requirements for Home and Building Electronic Systems (HBES) and Building
Automation and Control Systems
3 Terms, definitions and abbreviations
3.1 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1.1
Customer Energy Manager
CEM
internal automation function for optimizing the energy consumption, production and storage within the premises
according to the preferences of the customer using internal flexibilities and typically based on external
information received through the Smart Grid Connection Point and possibly other data sources
3.1.2
Customer Energy Manager System
CEM system
allows the management of energy consumption, production and storage within the premises, consisting of a
CEM connected to one or more Resource Managers which themselves act as gateways to HBES / BACS, SASS
and / or Smart Appliances
5
---------------------- Page: 7 ----------------------
SIST EN 50491-12-1:2018
EN 50491-12-1:2018 (E)
3.1.3
Energy Management Gateway
EMG
access point (functional entity) sending and receiving smart grid related information and commands between
an actor in the Grid and the CEM, letting the CEM decide how to process the events
Note 1 to entry: The communication is often ensured through an internet connection.
3.1.4
Head End System
HES
system that receives metering data in the advanced metering infrastructure
3.1.5
Home and Building Electronic Systems / Building Automation Control Systems
HBES / BACS
logical group of devices which uses a multi-application communication system where the functions are
distributed and linked through a common communication process
Note 1 to entry: HBES/BACS is used in homes and buildings plus their surroundings. Functions of the system are e.g.:
switching, open loop controlling, closed loop controlling, monitoring and supervising.
Note 2 to entry: In literature, HBES/BACS may be referred also as “home control system/network“, „home electronic
systems” “building automation systems” etc.
Note 3 to entry: Examples of HBES/BACS applications are the management of lighting, heating, energy, water, fire alarms,
blinds, different forms of security, etc.”. See introduction in EN 50491–4-1.
3.1.6
schema
abstract model that documents and organizes the data required in a defined way, so it can be used for different
purposes such as exchanging and / or storing information
3.1.7
Local Network Access Point
LNAP
specific Network Interface controller between the Local Network (within the premises) and a system acting as
back-end for the metering communication, which controls and monitors the communication to metering devices
(instruments for measuring, memorizing data related to the consumption of commodity)
3.1.8
Meter Data Management
MDM
software system that performs long-term data storage and management for the vast quantities of data delivered
by smart metering systems
3.1.9
resource manager
software component that exclusively represents a logical group of devices or a single smart device, and is
responsible for sending unambiguous instructions to the logical group of devices or to a single device, typically
using a device-specific protocol
Note 1 to entry: In the context of this document the Resource Manager manages the energy flexibility of a logical group of
devices or a single smart device.
Note 2 to entry: The Resource Manager may be implemented in a special device, in the smart device itself or outside of
the device
6
---------------------- Page: 8 ----------------------
SIST EN 50491-12-1:2018
EN 50491-12-1:2018 (E)
3.1.10
Neighbourhood Network Access Point
NNAP
specialized Network Interface Controller between the Neighbourhood Network and Wide Area Network (WAN),
see CEN/CLC/ETSI TR 50572
3.1.11
premises
can be a public or private building/home where energy is used and/or produced
3.1.12
smart appliance
device that consumes energy that can be controlled by a Resource Manager, such as a washing machine, a
freezer, a dishwasher
3.1.13
Smart Device
SD
device that can consume, produce or store energy (or a combination thereof) and that can be controlled by a
Resource Manager for the purpose of energy management, such as a lighting controller, an electric vehicle, a
smart appliance, a renewable power source, an energy storage system
3.1.14
Smart Grid Connection Point
SGCP
physical and logical borderline / interface from the customer to the network/market or from the network/market
to the customer
Note 1 to entry: The SGCP can be implemented by one or more separate interfaces.
3.1.15
Smart meter gateway
SMG
interface between the premises and the metering network
Note 1 to entry: The SMG may have three interfaces, one to the HAN (Home Area Network), one to the LMN (Local
Metrological Network) which is the interface to the different meters and one interface to the WAN (Wide Area Network).
Note 2 to entry: The smart meter gateway can be a part of a meter.
3.1.16
Single Application Smart System
SASS
group of devices having a communication interface for a single application such as heating or lighting, that
consume, produce or store energy (or a combination thereof) and that can be controlled by a Resource Manager
for the purpose of energy management
3.1.17
aggregator
actor whose goal it is to maximize the value of flexibility, taking into account customer needs, economical
optimization and grid capacity
7
---------------------- Page: 9 ----------------------
SIST EN 50491-12-1:2018
EN 50491-12-1:2018 (E)
3.2 Abbreviations
BACS Building Automation Control Systems
CEM Customer Energy Manager
CHP Combined Heat and Power
DER Distributed Energy Resources
EMG Energy Management Gateway
H1 Local connection to simple external consumer display
H2 Connection between the SMG and EMG
HES Head End System
HBES Home and Building Electronic System
LNAP Local Network Access Point
MDM Meter Data Management
MCF Meter Communication Function
NNAP Neighbourhood Network Access Point
SASS Single Application Smart System
SD Smart Device
SGCG Smart Grid Co-ordination Group, reporting to CEN-CENELEC-ETSI and in charge of
answering the M/490 mandate
SGCP Smart Grid Connection Point
SMG Smart Meter Gateway
S1 Interface between Energy management gateway and CEM
S2 Interface between CEM and Resource Manager
4 Design considerations
4.1 General
For designing a system like the Smart Grid, some general design considerations have to be taken into account.
One important requirement for the Smart Grid is data security and data privacy.
4.2 Data security / privacy design guidelines
4.2.1 General
Data security and privacy should protect the system and keep the data private as much as possible.
Data security / privacy shall distinguish between the data security / privacy related to the Smart Grid side and
the data security / privacy within the Smart Grid premises side.
4.2.2 Data security / privacy on the smart grid side
It should not be possible to attack and impair the data. Data privacy can be achieved only by permitting the
exchange of aggregated energy management related data and / or private data for which the customer has
given permission to be used by a third party.
8
---------------------- Page: 10 ----------------------
SIST EN 50491-12-1:2018
EN 50491-12-1:2018 (E)
4.2.3 Data security / privacy on premises side
Data security / privacy on the premises side shall ensure that the data can only be read by authorized persons
and cannot be manipulated. Depending on the implementation of the system this can be reached with different
methods, for example:
– Data encryption and decryption;
– Constructive design (avoid that no one except authorized persons can gain access the devices and
communication channel).
4.2.4 Customer Energy Management System security
The security of the Customer Energy Manager System (CEMS) is linked to the number of connections between
the CEMS and the Neighbourhood Network. Every connection attempt between the CEMS and the
Neighbourhood Network shall be vetted to avoid unauthorized access to the CEMS. The more connections are
between the two networks then the more effort shall be spent for configuring of the different Firewalls and the
higher is the risk of security holes. Therefore, it is recommended to limit the connection points between the
CEMS and the Neighbourhood Network as much as possible. Ideally there is only one connection between the
CEMS and the Neighbourhood Network.
4.3 Device type agnostic energy management
While today there is a set of common devices and appliances (e.g. freezers, TV sets, electric bikes, …), the
data structures of the interface between the CEM and a Resource Manager should be designed in such a way
that even future device types can be correctly managed without the need to update the communication standard.
4.4 Clock alignment
The main task for a CEM is to manage energy, which basically are variations of (average) power over time. One
of the key CEM data structures is therefore a power profile and it makes “time” a central and very important
aspect.
“Time” seems like a trivial concept. Humans tend to think of “absolute” time in the form of a “date” plus a “24-
hour clock” information. But on a technical level it is not that trivial at all, because there are aspects like time
zones, different calendars, daylight saving time, leap seconds, hardware clock drift and the overall question of
how to actually synchronize multiple clocks to a desired type and precision of alignment.
This is why the CEM architecture shall incorporate a concept of clock alignment with a well-defined master clock
and time synchronization rules and procedures.
5 Background
The traditional model of the grid will lead to increased inefficiencies as electricity energy consumption and the
connection of distributed (renewable) energy resource equipment is increased.
In order to combat these problems, the architecture of traditional grids is being extended to include remote
control of distributed loads and energy resources, requiring bi-directional communication. This is the “Smart
Grid”.
Smart grids rely on flexibility in energy production and/or consumption to compensate for imbalance and
congestion in the grid, for example caused by:
– Increasing electricity demand by electric vehicle charging;
– Increasing numbers of renewable energy sources that are far less predictable/controllable than traditional
power plants.
The use of devices and equipment in homes and buildings that are able to control their energy consumption or
generation (either locally or remotely) greatly enhances the flexibility capability of a smart grid.
9
---------------------- Page: 11 ----------------------
SIST EN 50491-12-1:2018
EN 50491-12-1:2018 (E)
Energy flexibility can be defined as the ability to willingly deviate from the normal energy production and/or
consumption pattern over time and/or by power level. This flexibility may be used by third parties to help alleviate
imbalance or congestion.
Third parties will use different incentive schemes to unlock the flexibility potential, such as time of day pricing,
real time pricing, feed-in tariffs and variable grid tariffs. These incentives should somehow be mapped to the
capabilities of smart devices in order to deliver energy flexibility.
Figure 1 — Future Electricity Network
The Smart Grid Architecture Model (SGAM) was developed by the CEN-CENELEC-ETSI Smart Grid
Coordination Group in order to provide a general representation of the architecture of a smart grid. It is used
here in order to show the scope of this specification within the general context of the smart grid.
The SGAM incorporates the main elements of the electricity energy supply system as a set of Domains. Each
Domain is further split into hierarchical levels of power system management, referred to as Zones, ranging from
Process to Market. Finally, five interoperable layers are mapped over the Domains and Zones. More information
may be found in CEN-CENELEC-ETSI Smart Grid Coordination Group; Smart Grid Reference Architecture;
November 2012.
This standard relates to the Customer Premise Domain, the Process to Field Zones and Communication,
Information and Function Interoperability Layers.
10
---------------------- Page: 12 ----------------------
SIST EN 50491-12-1:2018
EN 50491-12-1:2018 (E)
Figure 2 — Abstract view of Future Electricity Network described by
the Smart Grid Reference Architecture (SGAM) Model
11
---------------------- Page: 13 ----------------------
SIST EN 50491-12-1:2018
EN 50491-12-1:2018 (E)
Figure 3 — Graphical representation of a Premises smart grid system
In a Smart Grid environment, devices in the home/building environment are considered as either loads,
generators, storage or a combination of those. Some devices are able to communicate with each other and
external bodies for energy management purposes. These are referred to as smart devices and can include
space and water heating systems, white and brown goods (“appliances”), plug-in electric vehicles, micro
generation equipment (PV, CHP, wind turbine, hydro-electric, fuel cell etc.), domestic storage batteries, lighting
systems and so on.
6 Smart Grid premises side Architecture
6.1 General
The Smart Grid may control or influence the operation of smart devices, according to its requirements. For
instance, the smart grid may request that the energy consumption or production of a building is increased or
decreased or shifted in time. This control may be directed to specific smart devices or to the property in general.
In the latter case, a range of options for smart device control may result in the same aggregated outcome for
the property.
12
---------------------- Page: 14 ----------------------
SIST EN 50491-12-1:2018
EN 50491-12-1:2018 (E)
The consumer is likely to have their own set of preferences for the operation of their smart devices. These
preferences include time of use, cost, level of comfort (e.g. heating/lighting) etc. Unless expressed explicitly in
legally binding documents (i.e. a contract) then the consumer's preference shall always take precedence over
those of the smart grid. However, the consumer may be presented with a set of options (i.e. from a control
entity) from which to choose and may modify their preferences at any time.
Figure 4 — Logical view of a Premises smart grid system
One of the main operational parameters, cost, is expected to be provided by the energy supplier via the smart
metering system. Figure 4 shows the relationship between the smart metering and smart grid functional
architectures. Cost information may be transferred either directly via interface H2 or indirectly via Actor A (e.g.
retailer/vendor, Balance Responsible Party, aggregator). Actor B is in charge of metering.
The entity providing the logical connection between the smart grid and the smart devices in the home/building
is known as the Customer Energy Manager (CEM). It is expected that CEMs will be made available with a range
of features, from the very simple to the highly sophisticated. Although this document does not specify the
operation of the CEM, several assumptions are made on the basic operation of every CEM.
In essence, the CEM at least multiplexes/de-multiplexes communication between the smart grid and the smart
devices in the home/building although it may also provide other services including forecasting and scheduling.
As of yet there is however no standardized interface to describe and control the energy flexibility of smart
devices. Such an interface (S2), defined in this standard series, allows generic, interoperable communication
for energy flexibility between smart devices and energy management applications.
13
---------------------- Page: 15 ----------------------
SIST EN 50491-12-1:2018
EN 50491-12-1:2018 (E)
Figure 5 — Zoomed in view of a CEMS and HBES, SASS and Smart Device
The different types of smart devices in the home/building are likely to use different communications protocols
and/or different data/function models. In addition, it is likely that smart grid entities use a different set of protocols
to the home/building smart devices. The CEM acts as a “negotiator” between all of these different
representations (at least at the data/function level).
There is a limited number of protocols available for communication from the smart grid to the home/building.
However, within the home/building space many protocols are available today and more are likely to become
available in the future. In order to prevent the requirement to support an open-ended range of protocols, it is
useful to define a “neutral” or common data/function model, message structures and message sequencing rules
to be used between the CEM and the various HBES or SASS to which the smart devices are attached.
6.2 Smart Grid Connection Point (SGCP)
The Smart Grid Connection Point (SGCP) is the connection point between the outer smart grid world (i.e. the
distribution network) and the smart grid premises side. The SGCP may have different functions depending on
the local smart grid implementation. Usually, the communications protocols used by the SGCP will only vary at
the lower layers; the information models and protocol are expected to be unchanged. Information coming in
from the grid is terminated at the CEM.
6.3 Energy Management Gateway (EMG)
The Energy Management Gateway (EMG) combines the information from the Grid and Metering systems
allowing the cost of the electrical energy to be taken into account.
14
---------------------- Page: 16 ----------------------
SIST EN 50491-12-1:2018
EN 50491-12-1:2018 (E)
6.4 Interface S1
Interface S1 transports the Grid and metering data to the Customer Energy Manager (CEM) to ensure the
interoperability between the grid and the premises. This interface will be defined by the IEC 62746 series.
6.5 Customer Energy Manager (CEM)
The CEM is a software component that is responsible for energy management within the premises. It receives
the flexibility constraints/options of all devices on the premises, may aggregate these, and tries to find the most
optimal set of device allocations. What constitutes an optimal solution depends on the incentives and constraints
that are taken into account (and usually result from a specific commercial proposition). These may differ from
one CEM implementation to another. The CEM shall implement interface S1 and S2 (energy flexibility options
of devices). Should additional information/interaction be required for its
...
SLOVENSKI STANDARD
oSIST prEN 50491-12-1:2017
01-november-2017
Splošne zahteve za stanovanjske in stavbne elektronske sisteme (HBES) in
sisteme za nadzor in avtomatizacijo stavb (BACS) - Pametna omrežja - Aplikacijske
specifikacije - Vmesnik in okvir za odjemalca - 12-1. del: Vmesnik med CEM in
upravljalcem stanovanjskih in stavbnih virov - Splošne zahteve in arhitektura
General requirements for Home and Building Electronic Systems (HBES) and Building
Automation and Control Systems (BACS) - Smart grid - Application specification -
Interface and framework for customer - Part 12-1: Interface between the CEM and
Home/Building Resource manager - General Requirements and Architecture
([LJHQFHVJpQpUDOHVUHODWLYHVDX[V\VWqPHVpOHFWURQLTXHVSRXUOHVIR\HUVGRPHVWLTXHV
HWOHVEkWLPHQWV +%(6 HWDX[V\VWqPHVGHJHVWLRQWHFKQLTXHGXEkWLPHQW 6*7%
5pVHDXLQWHOOLJHQW6SpFLILFDWLRQG
DSSOLFDWLRQ,QWHUIDFHHWFDGUHSRXUOHFOLHQW3DUWLH
,QWHUIDFHHQWUHOHJHVWLRQQDLUHGpQHUJLHSRXUOHFOLHQW &(0&XVWRPHU(QHUJ\
0DQDJHU HWOHJHVWLRQQDLUHGHUHVVRXUFHVSRXUIR\HUVGRPHVWLTXHVEkWLPHQWV
([LJHQFHVHW$UFKLWHFWXUHJpQpUDOHV
Ta slovenski standard je istoveten z: prEN 50491-12-1
ICS:
35.240.67 Uporabniške rešitve IT v IT applications in building
gradbeništvu and construction industry
97.120 Avtomatske krmilne naprave Automatic controls for
za dom household use
oSIST prEN 50491-12-1:2017 en,fr
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
oSIST prEN 50491-12-1:2017
---------------------- Page: 2 ----------------------
oSIST prEN 50491-12-1:2017
EUROPEAN STANDARD DRAFT
prEN 50491-12-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2017
ICS 97.120
English Version
General requirements for Home and Building Electronic Systems (HBES)
and Building Automation and Control Systems (BACS) - Smart grid -
Application specification - Interface and framework for customer - Part 12-1:
Interface between the CEM and Home/Building Resource manager -
General Requirements and Architecture
Exigences générales relatives aux systèmes électroniques
pour les foyers domestiques et les bâtiments (HBES)
(HBES) et aux systèmes de gestion technique du bâtiment
(SGTB) - Réseau intelligent - Spécification d'application -
Interface et cadre pour le client - Partie 12-1 : Interface
entre le gestionnaire d'énergie pour le client (CEM,
Customer Energy Manager) et le gestionnaire de
ressources pour foyers domestiques/ bâtiments. Exigences
et Architecture générales
This draft European Standard is submitted to CENELEC members for enquiry.
Deadline for CENELEC: 2017-11-24.
It has been drawn up by CLC/TC 205.
If this draft becomes a European Standard, CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which
stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
This draft European Standard was established by CENELEC in three official versions (English, French, German).
A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to
the CEN-CENELEC Management Centre has the same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden,
Switzerland, Turkey and the United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to
provide supporting documentation.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2017 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Project: 63376 Ref. No. prEN 50491-12-1 E
---------------------- Page: 3 ----------------------
oSIST prEN 50491-12-1:2017
prEN 50491-12-1:2017 (E)
1
2 European foreword . 3
3 Introduction . 4
4 1 Scope . 5
5 2 Normative references . 5
6 3 Terms, definitions and abbreviations . 5
7 3.1 Terms and definitions . 5
8 3.2 Abbreviations . 7
9 4 Design considerations . 8
10 4.1 General . 8
11 4.2 Data security /privacy . 8
12 4.3 Device type agnostic energy management . 8
13 4.4 Clock alignment . 8
14 5 Background. 9
15 6 Smart Grid premises side Architecture . 12
16 6.1 General . 12
17 6.2 Smart Grid Connection Point (SGCP) . 14
18 6.3 Energy Management Gateway (EMG) . 14
19 6.4 Interface S1 . 14
20 6.5 Customer Energy Manager (CEM) . 15
21 6.6 Interface S2 . 16
22 6.7 Resource manager . 16
23 6.8 HBES . 17
24 7 User Stories and Use Cases . 17
25 7.1 Requirements for interoperability . 17
26 7.2 Determining the requirements for Interface S2 . 17
27 7.3 Extensibility of S2 Requirements . 18
28 Annex A (informative) Use Case example . 19
29 Bibliography . 22
30
2
---------------------- Page: 4 ----------------------
oSIST prEN 50491-12-1:2017
prEN 50491-12-1:2017 (E)
31 European foreword
32 This document (prEN 50491-12-1:2017) has been prepared by the Technical Committee CLC/TC 205, “Home
33 and Building Electronic Systems (HBES)”.
34 This document is currently submitted to the Enquiry.
35 The following dates are proposed:
• latest date by which the existence of this (doa) dor + 6 months
document has to be announced at national
level
• latest date by which this document has to be (dop) dor + 12 months
implemented at national level by publication of
an identical national standard or by
endorsement
• latest date by which the national standards (dow) dor + 36 months
conflicting with this document have to be (to be confirmed or
withdrawn modified when voting)
36 EN 50491-12 is part of the EN 50491 series of European Standards - General requirements for Home and
37 Building Electronic Systems (HBES) and Building Automation and Control Systems (BACS) - which will
38 comprise the following parts:
39 — Part 1: General requirements;
40 — Part 2: Environmental Conditions;
41 — Part 3: Electrical Safety Requirements;
42 — Part 4-1: General functional safety requirements for products intended to be integrated in Building
43 Electronic Systems (HBES) and Building Automation and Control Systems (BACS);
44 — Part 5-1: EMC requirements, conditions and test set-up;
45 — Part 5-2: EMC requirements for HBES/BACS used in residential, commercial and light industry
46 environment;
47 — Part 5-3: EMC requirements for HBES/BACS used in industry environment
48 — Part 6-1: HBES installations - Installation and planning;
49 — Part 6-3: HBES installations - Assessment and definition of levels;
50 — Part 11: Smart Metering – Application Specification – Simple External Consumer Display;
51 — Part 12: Smart grid - Application specification - Interface and framework for customer;
52 — Part 12-1: Interface between the CEM and Home/Building Resource manager– General Requirements and
53 Architecture
54 — Future Part 12-2: Interface between the Home/Building CEM and Resource manager(s)– Data model and
55 messaging
56 — Future Part 12-3: Home/Building Customer Energy Manager (CEM)
57 — Future Part 12-4: Resource manager
3
---------------------- Page: 5 ----------------------
oSIST prEN 50491-12-1:2017
prEN 50491-12-1:2017 (E)
58 Introduction
59 Traditional electricity networks make use of a primarily one-way flow of energy and communication from the
60 generator to the consumer via the transmission and distribution systems.
61 Although there is some monitoring and control of equipment in the transmission and distribution systems, there
62 is no communication with, or control of, consumer equipment. In particular, there is no means of requesting
63 short-term control of consumer equipment according to generation and/or transmission/distribution grid
64 conditions. Generation equipment is controlled according to the open-ended (uncontrolled) demand of the
65 consumer.
2
66 Today we are faced with an increase of power consumption, this is directly connected to an increase of CO
2
67 production. The increased CO density in the atmosphere supports the climate warming of the earth.
2
68 One significant way to cope with the increased energy consumption without increasing the CO production is to
69 use more renewable energy resources.
70 Unfortunately, the available renewable energy supply is not aligned with the energy demand. To increase the
71 efficiency, the energy demand should be aligned as much as possible with the available energy supply. To
72 reach this goal communication between the various equipment and systems of the stakeholders within the
73 energy field is necessary. This grid, exchanging information and energy between producers, consumers,
74 distributors and metering is known as the “Smart Grid”.
75 The EN 50491-12 series describes aspects of this smart grid that relate specifically to the premises
76 (home/building) part of the smart grid, including the common interface between equipment in the premises and
77 the smart grid is described.
4
---------------------- Page: 6 ----------------------
oSIST prEN 50491-12-1:2017
prEN 50491-12-1:2017 (E)
78 1 Scope
79 This European Standard specifies General Requirements and Architecture of an application layer interface
80 between the Customer Energy Manager (CEM) and Smart Devices (SD) operating within the smart grid
81 premises side system (i.e. home or building but not industrial premises).
82 This standard does not include:
83 – Safety;
84 – EMC;
85 – Data Security; it is assumed that the underlying protocols will take the Data Security aspect into account;
86 – Special equipment (e.g. legacy heat pumps) with a direct physical connection to the grid, as such equipment
87 bypasses the CEM and is not HBES/BACS enabled (covered by other standards than the
88 EN 50491 series).
89 2 Normative references
90 The following documents are referred to in the text in such a way that some or all of their content constitutes
91 requirements of this document. For dated references, only the edition cited applies. For undated references, the
92 latest edition of the referenced document (including any amendments) applies.
93 EN 50491-12 (all parts), General requirements for Home and Building Electronic Systems (HBES) and Building
94 Automation and Control Systems
95 3 Terms, definitions and abbreviations
96 3.1 Terms and definitions
97 For the purposes of this document, the following terms and definitions apply:
98 3.1.1
99 Customer Energy Manager
100 CEM
101 internal automation function for optimizing the energy consumption and/or production within the premises
102 according to the preferences of the customer using internal flexibilities and typically based on external
103 information received through the Smart Grid Connection Point and possibly other data sources
104 3.1.2
105 Customer Energy Manager System
106 CEM system which allows to manage the energy consumption and or production within the premises, consists
107 of a CEM and attached Resource Manager which connects the HBES / BACS and / or Smart Appliances to the
108 CEM
109 3.1.3
110 Energy Management Gateway
111 EMG
112 access point (functional entity) sending and receiving smart grid related information and commands between
113 an actor in the Grid and the CEM, letting the CEM decide how to process the events
114 Note 1 to entry: The communication is often ensured through an internet connection.
115 3.1.4
116 Head End System
117 HES
118 system that receives metering data in the advanced metering infrastructure
5
---------------------- Page: 7 ----------------------
oSIST prEN 50491-12-1:2017
prEN 50491-12-1:2017 (E)
119 3.1.5
120 Home and Building Electronic Systems / Building Automation Control System
121 HBES / BACS
122 logical group of devices which uses a multi-application communication system where the functions are
123 distributed and linked through a common communication process
124 Note 1 to entry: HBES/BACS is used in homes and buildings plus their surroundings. Functions of the system are e.g.:
125 switching, open loop controlling, closed loop controlling, monitoring and supervising.
126 Note 2 to entry: In literature, HBES/BACS may be referred also as “home control system/network“, „home electronic
127 systems” “home automation systems” etc.
128 Note 3 to entry: Examples of HBES/BACS applications are the management, of lighting, heating, energy water, fire alarms,
129 blinds, different forms of security, etc.”. See introduction in EN 50491–4-1.
130 3.1.6
131 Schema
132 abstract model that documents and organizes the data required in a defined way, so it can be used for different
133 purposes such as exchanging and or storing information
134 3.1.7
135 Local Network Access Point
136 LNAP
137 specific Network Interface controller between the Local Network (within the premises) and a system acting as
138 back-end for the metering communication, which controls and monitors the communication to the Tx meter
139 (Instrument for measuring, memorizing data related to the consumption of commodity)
140 3.1.8
141 Meter Data management
142 MDM
143 software system that performs long-term data storage and management for the vast quantities of data delivered
144 by smart metering systems
145 3.1.9
146 Resource Manager
147 software component that exclusively represents a logical group of devices or a single smart device, and is
148 responsible for sending unambiguous instruction to the logical group of devices or to single device, typically
149 using a device-specific protocol
150 Note 1 to entry: In the context of this document the Resource Manager manages the energy flexibility of a logical group of
151 devices or a single smart device.
152 Note 2 to entry: The Resource Manager may be implemented in a special device, in the smart device itself or outside of
153 the device
154 3.1.10
155 Neighborhood Network Access Point
156 NNAP
157 specialized Network Interface Controller between the Neighbourhoods Network and Wide Area Network (WAN)
158 3.1.11
159 premises
160 can be a public or private building/home where energy is used and/or produced
161 3.1.12
162 Smart Appliances
163 device that consumes energy that can be controlled by a Resource Manager. Smart Appliance can be a washing
164 machine, a freezer
6
---------------------- Page: 8 ----------------------
oSIST prEN 50491-12-1:2017
prEN 50491-12-1:2017 (E)
165 3.1.13
166 Smart Device
167 SD
168 device that can consume, produce or store energy (or a combination thereof) and that can be controlled by a
169 Resource Manager for the purpose of energy management. Smart Devices can be Electrical Vehicles, Smart
170 Appliances, renewable Power sources
171 3.1.14
172 Smart Grid Connection Point
173 SGCP
174 physical and logical borderline / interface from the customer to the network/market or from the network/market
175 to the customer, considering generation, storage or demand
176 Note 1 to entry: The SGCP can be implemented by one or more separate interfaces.
177 3.1.15
178 Smart meter gateway
179 SMG
180 interface between the premises and the metering network
181 Note 1 to entry: The SMG may have three interfaces, one to the HAN (Home Area Network), one to the LMN (Local
182 Metrological Network) which is the interface to the different meter and one interface to the WAN (Wide Area Network).
183 Note 2 to entry: The smart meter gateway can be a part of the meter.
184 3.2 Abbreviations
BACS Building Automation Control Systems
CEM Customer Energy Manager
CHP Combined Heat and Power
DER Distributed Energy Resources
EMG Energy Management Gateway
H1 Local connection to simple external consumer display
H2 Connection between the SMG and EMG)
HES Head End System
HBES Home and Building Electronic System
LNAP Local Network Access Point
MDM Meter Data Management
MCF Meter Communication Function
NNAP Neighbourhood Network Access Point
SD Smart Device
SGCG Smart Grid Co-ordination Group, reporting to CEN-CENELEC-ETSI and in charge of
answering the M/490 mandate
SGCP Smart Grid Connection Point
SMG Smart Meter Gateway
S1 Interface between Energy management gateway and CEM
S2 Interface between CEM and Resource Manager
7
---------------------- Page: 9 ----------------------
oSIST prEN 50491-12-1:2017
prEN 50491-12-1:2017 (E)
185 4 Design considerations
186 4.1 General
187 For designing a system like the Smart Grid, some general design considerations have to be taken into account.
188 One important requirement for the Smart Grid is the data security and data privacy.
189 4.2 Data security /privacy
190 4.2.1 General
191 Data security and privacy should protect the system and keep the data as much as possible private.
192 The data security / privacy shall be distinguished between the data security / privacy related to the smart Grid
193 and the Data security / privacy within the Smart grid premises side.
194 4.2.2 Data security / privacy on the smart grid side
195 It should be not possible to attack and impair the data. The data privacy can be reached by exchanging only
196 aggregated, energy management related data and / or data where the customer has given the permission to
197 use the data by a second person
198 4.2.3 Data security / privacy on premises side
199 Data security / privacy on the premises side shall guarantee that the data can only read by authorized persons
200 and cannot be manipulated. Depending on the implementation of the system this can be reached with different
201 methods:
202 – Data encryption and decryption;
203 – Constructive design (avoid that anyone except authorized persons can get access to the devices and
204 communication channel).
205 4.2.4 Customer Energy Management System security
206 The security of the Customer Energy Manager System (CEMS) is linked to the number of connections between
207 the CEMS and the Neighbourhood Network. Every connection between the CEMS and the Neighbourhood
208 Network shall contain a Firewall to avoid non authorized access to the CEMS. The more connections are
209 between the two networks the more effort shall be spent for configuring of the different Firewalls and the higher
210 is the risk of security holes. Therefore, it is recommended to limit the connection points between the CEMS and
211 the Neighbourhood Network as much as possible. Ideally there is only one connection between the CEMS and
212 the Neighbourhood Network.
213 4.3 Device type agnostic energy management
214 While today there is a set of common devices and appliances (e.g. freezers, TV sets, electric bikes, …), the
215 data structures of the CEM interface S2 should be designed in such a way that even future device types, which
216 currently are unknown (e.g. micro power-to-methanol reactors, fridge-freezer- air conditioners, …), can be
217 correctly managed without the need to update the communication standard.
218 4.4 Clock alignment
219 The main task for a CEM is to manage energy, which basically are variations of (average) power over time. One
220 of the key CEM data structures is therefore a power profile and it makes “time” a central and very important
221 aspect.
222 “Time” seems like a trivial concept. Humans tend to think of “absolute” time in the form of a “date” plus a “24-
223 hour clock” information. But on a technical level it is not that trivial at all, because there are aspects like time
224 zones, different calendars, daylight saving time, leap seconds, hardware clock drift and the overall question of
225 how to actually synchronize multiple clocks to a desired type and precision of alignment.
8
---------------------- Page: 10 ----------------------
oSIST prEN 50491-12-1:2017
prEN 50491-12-1:2017 (E)
226 This is why the CEM architecture will need to incorporate a concept of clock alignment with a well-defined
227 master clock and time synchronization rules and procedures.
228 5 Background
229 The traditional model of the grid will lead to increased inefficiencies as electricity power consumption and the
230 connection of distributed (renewable) energy resource equipment is increased.
231 In order to combat these problems, the architecture of traditional grids is being extended to include remote
232 control of distributed loads and energy resources, requiring bi-directional communication. This is the “Smart
233 Grid”.
234 Smart grids rely on flexibility in energy production and/or consumption to compensate for:
235 – Increasing demand at peak times;
236 – Increasing numbers of renewable energy sources that are far less predictable/controllable than traditional
237 power plants.
238 The use of devices and equipment in homes and buildings that are able to control their energy consumption or
239 generation (either locally or remotely) greatly enhances the flexibility capability of a smart grid.
240 Energy flexibility can be defined as the ability to willingly deviate from the normal energy production and/or
241 consumption pattern over time and/or by power level. This flexibility may be used by third parties to help alleviate
242 imbalance or congestion.
243 Third parties will use different incentive schemes to unlock the flexibility potential, such as time of day pricing,
244 real time pricing and feed in tariffs. These incentives should somehow be mapped to the capabilities of smart
245 devices to deliver energy flexibility.
9
---------------------- Page: 11 ----------------------
oSIST prEN 50491-12-1:2017
prEN 50491-12-1:2017 (E)
246
247 Figure 1 — Future Electricity Network
248 The Smart Grid Architecture Model (SGAM) was developed by CEN-CENELEC-ETSI Smart Grid Coordination
249 Group in order to provide a general representation of the architecture of a smart grid. It is used here in order to
250 show the scope of this specification within the general context of the smart grid.
251 The SGAM incorporates the main elements of the electricity energy supply system as a set of Domains. Each
252 Domain is further represented by a set of attributes, ranging from hardware to marketplace and termed Zones.
253 Finally, five interoperable layers are mapped over the Domains and Zones. More information may be found in
254 CEN-CENELEC-ETSI Smart Grid Coordination Group; Smart Grid Reference Architecture; November 2012
255 This standard is concerned with the Customer Premises Domain, the Process to Field Zones and
256 Communication, Information and Function Interoperability Layers.
10
---------------------- Page: 12 ----------------------
oSIST prEN 50491-12-1:2017
prEN 50491-12-1:2017 (E)
257
258 Figure 2 — Abstract view of Future Electricity Network described by
259 the Smart Grid Reference Architecture (SGAM) Model
260 In a Smart Grid environment, devices in the home/building environment are considered as either loads,
261 generators or both (storage devices). If these devices are in some way able to communicate with other devices
262 and, optionally, receive and act upon (operational) control requests from other devices, then they are considered
263 to be smart devices.
11
---------------------- Page: 13 ----------------------
oSIST prEN 50491-12-1:2017
prEN 50491-12-1:2017 (E)
264
265 Figure 3 — Graphical representation of a Premises smart grid system
266 Such smart devices include space and water heating systems, white and brown goods (“appliances”), PEV,
267 micro generation equipment (PV, CHP, wind turbine, hydro-electric, fuel cell etc.), domestic storage batteries,
268 lighting systems and so on.
269 6 Smart Grid premises side Architecture
270 6.1 General
271 If connected, the Smart Grid may control, or influence the control of, the operation of smart devices (to a greater
272 or lesser extent), according to its requirements. For instance, messages may be received from the grid that
273 request that the load demand of a property is shifted in time (or amplitude), or that more energy is fed into the
274 grid. These messages may be directed at specific smart devices or at the property in general. In the latter case,
275 a range of options for smart device control may result in the same aggregated outcome for the property.
276 The consumer is likely to have their own set of preferences for the operation of their smart devices. These
277 preferences include time of use, cost, level of comfort (e.g. heating/lighting) etc. Unless expressed explicitly in
278 legally binding documents (i.e. a contract) then the consumer's preference shall always take precedence over
279 those of the smart grid. However, the consumer may be presented with a set of options (i.e. from a control
280 entity) from which to choose and may modify their preferences at any time.
12
---------------------- Page: 14 ----------------------
oSIST prEN 50491-12-1:2017
prEN 50491-12-1:2017 (E)
281
282 Figure 4 — Logical view of a Premises smart grid system
283 One of the main operational parameters, cost, is expected to be provided by the energy supplier via the smart
284 metering system. Figure 4 shows the relationship between the smart metering and smart grid functional
285 architectures. Cost information may be transferred either directly via interface H2 or indirectly via Actor A.
286 The entity providing the logical connection between the smart grid and the smart devices in the home/building
287 is known as the Customer Energy Manager (CEM). It is expected that CEMs will be made available with a range
288 of features, from the very simple to the highly sophisticated. Although this document does not specify the
289 operation of the CEM, several assumptions are made on the basic operation of every CEM.
290 In essence, the CEM at least multiplexes/de-multiplexes communication between the smart grid and the smart
291 devices in the home/building although it may also provide other services including forecasting and scheduling.
292 As of yet there is however no standardized interface to describe and control the energy flexi
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.