IEC TR 61850-90-27:2023

Communication networks and systems for power utility automation - Part 90-27: Use of IEC 61850 for thermal energy systems connected to electric power grid

IEC TR 61850-90-27:2023, which is a Technical Report, is to provide basic aspects that need to be considered when using IEC 61850 for information exchange between systems and components to support applications for thermal systems connected to electric power networks. Thermal systems isolated from electric power networks are outside the scope of this document.
From the perspective of category, this document considers thermal systems that provide thermal energy services for residential and/or commercial buildings and districts. In other words, industrial thermal systems are outside the scope of this document.
From the perspective of energy transformation, this document deals with ones between electricity and thermal energy. Other types of energy such as gas will be documented in a future report.
From the perspective of resource, this document considers generic aspects of thermal energy generators, storage, and loads that may contribute to the operations and management of electric power networks. It also deals with specific types of resources that have electric parts such as power to heat (P2H) that is a kind of electric load, and combined heat and power (CHP) that is an electric generator. This document models the characteristics for such specific units of resources including alarms and ratings. On the other hand, it does not deal with other types of specific units according to the scope of this document. For example, gas boilers, thermal energy tanks, heat exchangers, HVAC, auxiliary devices for thermal systems are not modelled as logical nodes in this document.
As a summary, this document
- gives an overview of thermal energy resources connected to electric power networks.
- provides use cases for typical operations of thermal system and deducts exchanged information necessary for information modelling.
- provides mapping of requirements on LNs based on the use cases.
- defines generic logical nodes for resources in thermal systems.
- defines logical nodes for specific unit types of P2H and CHP.
- defines logical nodes for operations that may contribute to the operations of electric power networks.

General Information

• Status: Published
• Publication Date: 15-Aug-2023
• ICS: 33.200 - Telecontrol. Telemetering
• Technical Committee: TC 57 - Power systems management and associated information exchange
• Drafting Committee: WG 17 - TC 57/WG 17
• Current Stage: PPUB - Publication issued
• Start Date: 17-Aug-2023
• Completion Date: 16-Aug-2023

Standards Content (Sample)

IEC TR 61850-90-27 ®
Edition 1.0 2023-08
TECHNICAL
REPORT
colour
inside
Communication networks and systems for power utility automation –
Part 90-27: Use of IEC 61850 for thermal energy systems connected to electric
power grid
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IEC TR 61850-90-27 ®
Edition 1.0 2023-08
TECHNICAL
REPORT
colour
inside
Communication networks and systems for power utility automation –

Part 90-27: Use of IEC 61850 for thermal energy systems connected to electric

power grid
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS  33.200 ISBN 978-2-8322-7339-5

– 2 – IEC TR 61850-90-27:2023 © IEC 2023
CONTENTS
FOREWORD . 8
INTRODUCTION . 10
1 Scope . 11
1.1 General . 11
1.2 Data model Namespace name and version . 11
1.3 Data model Namespace Code Component distribution . 12
2 Normative references . 13
3 Terms and definitions . 13
4 Abbreviated terms . 16
4.1 General purpose abbreviated terms . 16
4.2 Abbreviated terms used in data object names . 17
5 Overview of thermal systems . 17
5.1 General . 17
5.2 System structure . 18
5.3 Energy transformation . 19
5.3.1 General . 19
5.3.2 Transformation from electricity to thermal energy . 19
5.3.3 Transformation from thermal energy to electricity . 20
5.3.4 CHP device . 20
6 Use cases . 21
6.1 General . 21
6.2 Common actors . 21
6.2.1 General . 21
6.2.2 Actors from IEC 62913-2-3 . 21
6.2.3 Actors originating with the thermal energy domain . 23
6.3 Use case 1: "Aggregated energy storage in buildings for electricity grid
congestion management via electricity demand shifting" . 23
6.3.1 Motivation . 23
6.3.2 Solution . 23
6.3.3 Benefit . 24
6.4 Use case 2: Small-scale cogeneration for e-grid stabilisation and heat
generation for use in building or injection . 25
6.4.1 Motivation . 25
6.4.2 Solution . 25
6.4.3 Benefits . 25
6.5 Use case 3: Centralised heat-pumps for hot water storage in DH plant
facilities . 26
6.5.1 Motivation . 26
6.5.2 Solution . 26
6.5.3 Benefit . 26
6.6 Use case 4: Providing tertiary reserve to electric power systems by demand
response using thermal energy storage . 26
6.6.1 General . 26
6.6.2 Motivation . 26
6.6.3 Solution . 27
6.6.4 Benefits . 28
7 Information model requirements . 28

7.1 General . 28
7.2 Mappings of requirements on LN classes at the resource level . 28
7.3 Mappings of requirements on LN classes at the operational function level . 33
7.4 Mappings of requirements on LN classes at the reference point level in
thermal energy network . 34
8 Logical node classes and data objects modelling . 36
8.1 General . 36
8.1.1 General . 36
8.1.2 Modelling principles of logical nodes considering sector coupling . 36
8.2 Generic resource LN . 39
8.2.1 Generic LN classes related to electrical DERs (DGEN, DSTO and
DLOD) . 39
8.2.2 Generic LN classes related to thermal energy resources (DGTH, DSTH
and DLTH) . 39
8.2.3 Generic LN classes related to both electrical DERs and thermal energy

resources (DETH and DETG) . 40
8.3 LN classes related to specific type of units . 40
8.3.1 General . 40
8.3.2 Modelling P2H units . 41
8.3.3 Modelling of CHP . 44
8.3.4 Modelling of thermal storage units . 45
8.4 Modelling of operational functions for energy services . 46
8.5 Modelling of reference points in thermal systems . 48
9 LN class definitions . 49
9.1 General . 49
9.2 Abstract logical nodes for thermal systems (AbstractLNs_90_27) . 49
9.2.1 General . 49
9.2.2 <> LN: All energy (electricity, thermal energy, and gas) mixed
DER  Name: AllEnergyMixedDERLN . 51
9.2.3 <> LN: Transformation from electricity to thermal  Name:
TransformationFromElectricityToThermalLN . 51
9.2.4 <> LN: Transformation from thermal energy to
electricity  Name: TransformationFromThermalToElectricityLN . 52
9.2.5 <> LN: Mixed electricity and thermal generator  Name:
MixedElectricityAndThermalGeneratorLN . 52
9.2.6 <> LN: Thermal resource  Name: ThermalResourceLN . 52
9.2.7 <> LN: Non thermal storage operational settings  Name:

NonThermalStorageOperationalSettingsLN . 53
9.2.8 <> LN: Thermal storage operational settings  Name:
ThermalStorageOperationalSettingsLN . 54
9.2.9 <> LN: Electricity to thermal energy unit  Name:
ElectricityToThermalUnitLN . 54
9.2.10 <> LN: Thermal operation function  Name:

ThermalOperationalFunctionLN . 54
9.2.11 <> LN: Thermal reference point  Name:
ThermalReferenceLN . 54
9.2.12 <> LN: Physical thermal reference  Name:
PhysicalThermalReferenceLN . 55
9.2.13 <> LN: Virtual Thermal Reference Point  Name:

VirtualThermalReferenceLN . 55
9.3 Generic logical nodes for thermal resource (LNGroupD) . 56
9.3.1 General . 56

– 4 – IEC TR 61850-90-27:2023 © IEC 2023
9.3.2 LN: Thermal generating resource  Name: DGTH . 56
9.3.3 LN: Thermal storage resource  Name: DSTH . 61
9.3.4 LN: Thermal load resource  Name: DLTH . 65
9.3.5 LN: Mixed electricity and thermal generating unit  Name: DETG . 68
9.3.6 LN: Electricity to thermal transforming unit  Name: DETH . 71
9.4 Extended logical nodes for distributed energy resources (LNGroupD) . 74
9.4.1 General .
...