Microgrids - Part 3-2: Technical requirements - Energy management systems

IEC TS 62898-3-2:2024 provides technical requirements for the operation of energy management systems of microgrids. This document applies to utility-interconnected or islanded microgrids. This document describes specific recommendations for low-voltage (LV) and medium-voltage (MV) systems.
This document focuses on developing standards of energy management systems aimed for microgrids integrated in decentralized energy systems or public distribution grids. It concerns some particularities that are not totally covered by the existing conventional energy system. The microgrid energy management systems are being studied by various actors (utilities, manufacturers, and energy providers) on actual demonstration projects and application use case. The aims of this document are to make the state of the art of existing energy management systems used in actual microgrids projects, to classify the relevant functions which can be accomplished by microgrid energy management systems, and to recommend necessary technical requirements for energy management systems of future microgrids.
This document includes the following items:
• main performances of key components of microgrid: decentralized energy resources, energy storages and controllable loads),
• description of main functions and topological blocks of microgrid energy management systems (MEMS),
• specification of information exchange protocol between main function blocks, linked to microgrid monitoring and control systems (MMCS).
Main functions of MEMS:
• power and energy management among different resources within microgrid including active and reactive power flows with different time scales,
• power and energy forecasts of microgrid,
• energy balancing between upstream grid and microgrid energy resources according to power and energy forecast and upstream and local constraints,
• economic and environmental optimization,
• possible service capacities such as capacity market auctions and resiliency anticipation: new business models,
• data archiving, trending, reporting and evaluation of operation capacities in various operation modes.
MEMS can have some other additional functions according to microgrid size and actual application cases:
• tariff and market trading management,
• utility ancillary services such as frequency regulation, voltage regulation, power quality and reliability improvement, demand response possibilities, change of operation modes linked to MMCS.

General Information

Status
Published
Publication Date
08-Jan-2024
Current Stage
PPUB - Publication issued
Start Date
25-Aug-2023
Completion Date
09-Jan-2024
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IEC TS 62898-3-2:2024 - Microgrids - Part 3-2: Technical requirements - Energy management systems Released:9. 01. 2024
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IEC TS 62898-3-2 ®
Edition 1.0 2024-01
TECHNICAL
SPECIFICATION
colour
inside
Microgrids –
Part 3-2: Technical requirements – Energy management systems

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IEC TS 62898-3-2 ®
Edition 1.0 2024-01
TECHNICAL
SPECIFICATION
colour
inside
Microgrids –
Part 3-2: Technical requirements – Energy management systems

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.240.01  ISBN 978-2-8322-8075-1

– 2 – IEC TS 62898-3-2:2024 © IEC 2024
CONTENTS
FOREWORD . 6
INTRODUCTION . 8
1 Scope . 9
2 Normative references . 10
3 Terms, definitions and abbreviated terms . 11
3.1 Terms and definitions . 11
3.2 Abbreviated terms . 12
4 General . 12
4.1 System architecture and functional mapping . 12
4.2 Stand-alone MEMS . 14
4.3 Integrated MEMS . 14
4.4 Communication protocols and cyber security . 14
4.4.1 Basic principle . 14
4.4.2 Recommended methods . 14
4.4.3 Cyber security . 16
4.5 Overview of MEMS function requirement . 16
5 Functional requirements . 18
5.1 Dispatch optimization . 18
5.1.1 Dispatch and scheduling models . 18
5.1.2 Dispatch optimization modes and objective functions . 19
5.1.3 Management of technical constraint conditions . 20
5.1.4 Optimization types and approaches . 21
5.2 Forecast function . 22
5.2.1 General . 22
5.2.2 Forecasting requirements and time dimension . 22
5.2.3 Renewable power generation forecast . 23
5.2.4 Load forecast . 23
5.2.5 Electricity price forecast . 23
5.2.6 Input values of forecast . 23
5.3 Demand side integration . 24
5.3.1 General . 24
5.3.2 Demand side management . 24
5.3.3 Demand side response . 24
5.3.4 Energy optimisation . 25
5.3.5 Power and energy exchange with upstream grid . 25
5.4 Flexible resource management . 25
5.4.1 General . 25
5.4.2 Controllable load management . 26
5.4.3 Energy management . 26
5.5 Data archiving, trending and reporting . 26
5.6 Market trading module (ancillary services) and market data . 26
Annex A (informative) Examples of actual microgrid application cases integrated with
associated functions of MEMS . 27
A.1 General . 27
A.2 Application CN1: Obtaining lower energy cost, lower pollution emission, and
higher penetration level of renewable energy . 27
A.2.1 Overview . 27

A.2.2 System structure. 27
A.2.3 Energy management system . 28
A.2.4 Energy management system operation . 28
A.3 Application CN2: Enhancing local power supply reliability for critical loads
with AC/DC hybrid microgrid . 29
A.3.1 Overview . 29
A.3.2 System structure. 30
A.3.3 Energy management strategy . 30
A.3.4 Operation modes . 31
A.3.5 Black start . 31
A.3.6 Energy management strategy . 32
A.3.7 Operation modes . 32
A.3.8 Black start . 33
A.4 Application DE1: Intelligent, data-driven, and grid stabilizing energy
management platform – Developing a pilot for industrial diesel application . 33
A.4.1 Overview . 33
A.4.2 System structure − IDGE Platform . 34
A.4.3 Energy management strategy . 36
A.4.4 Demonstrator and evaluation . 39
A.5 Application CN4: Electrifying islands with wind-PV-diesel-energy storage
and hybrid microgrids . 41
A.5.1 Overview . 41
A.5.2 Purpose . 42
A.5.3 Main functions of MEMS . 42
A.5.4 Applications . 42
A.6 Application CN5: Optimizing local energy resources with demand side
integrated microgrid including PV and energy storage . 43
A.6.1 Overview . 43
A.6.2 Purpose . 43
A.6.3 Main functions of MEMS . 43
A.6.4 Applications . 44
A.7 Application JP1: Local independent grid supplied by an energy production
system of combining biomass, biogas, wood chip co-firing, photovoltaic and
small wind power: the Hachinohe demonstration project from Japan . 45
A.7.1 Overview . 45
A.7.2 Purpose . 46
A.7.3 Main functions of the control system . 46
A.7.4 Applications . 47
A.8 Application JP2: Islanding operation of microgrid with only converter
connected resources and no-rotating machine: the 2005 World Exposition,
Aichi, from Japan . 49
A.8.1 Overview . 49
A.8.2 Purpose . 50
A.8.3 Main functions of the control system . 51
A.8.4 Applications . 52
A.9 Application JP3: Grasping the impact of mass solar power generation on the
actual power system and empirical research on system stabilization
measures using storage batteries: Miyakojima Mega Solar Demonstration
Research . 53
A.9.1 Overview . 53
A.9.2 Purpose . 56

– 4 – IEC TS 62898-3-2:2024 © IEC 2024
A.9.3 Main functions of the control system . 56
A.9.4 Applications . 56
A.10 Application IN1: Microgrid dedicated for energy communities on a public
distribution grid: Shakti demonstration in H2020 IElectrix project . 59
A.10.1 Overview .
...

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