IEC TS 62898-2-2023 PDF

Full title and description

IEC TS 62898-2: Microgrids — Part 2: Guidelines for operation (Amendment 1 published 2023). This Technical Specification gives guidance on the operation and control of alternating‑current (AC) microgrids at low and medium voltage with distributed energy resources (DER) and electrical energy storage. It covers operation modes and mode transfer, energy management systems (EMS), communication and monitoring, protection principles (including anti‑islanding, synchronization and reclosing), commissioning, maintenance and testing.

Abstract

IEC TS 62898-2 provides practical, non‑normative guidance to operators, designers and integrators of AC microgrids for safe, reliable and coordinated operation. The 2023 amendment updates and clarifies operational procedures, EMS interfaces and protection principles to reflect experience with grid‑connected and islanded operation of DER‑rich systems. The document excludes DC microgrids and focuses on low and medium voltage AC systems.

General information

• Status: Published / Active (consolidated with amendment).
• Publication date: Amendment published 7 November 2023 (consolidated edition 2023).
• Publisher: International Electrotechnical Commission (IEC), TC 8 / SC 8B (Decentralized electrical energy systems).
• ICS / categories: 29.240.01 (Power transmission and distribution networks in general).
• Edition / version: Original TS edition 1.0 (2018) amended by Amendment 1 (2023); consolidated CSV edition 1.1 (2023).
• Number of pages: Amendment document: 6 pages; Consolidated CSV edition: 77 pages (consolidated text including the amendment).

Scope

This Technical Specification applies to operation and control of alternating‑current microgrids with loads and distributed energy resources at low or medium voltage. It addresses both non‑isolated microgrids (that can operate grid‑connected and islanded) and isolated microgrids. DC microgrids are excluded. Main scope items include operation modes and transitions, EMS and control strategies, communication and monitoring procedures, electrical energy storage management, protection principles (non‑isolated and isolated operation, anti‑islanding, synchronization, reclosing, power quality) and activities for commissioning, maintenance and testing.

Key topics and requirements

• Definitions of operation modes (grid‑connected, islanded) and recommended procedures for mode transfer.
• Guidance on Energy Management System (EMS) functions and control hierarchies for dispatching DER and storage.
• Communication and monitoring recommendations to support operational visibility and EMS interaction.
• Electrical energy storage considerations for charge/discharge control, state‑of‑charge management and role in mode transitions.
• Protection principles for non‑isolated and isolated microgrids, including anti‑islanding detection, synchronization and reclosing strategies.
• Power quality considerations and recommended mitigation measures at points of common coupling.
• Commissioning, periodic testing and maintenance procedures to verify operational readiness and protection coordination.
• High‑level interoperability and functional expectations for DER, control equipment and operators to enable coordinated operation.

Typical use and users

Used by distribution utilities, microgrid owners and operators, system integrators, DER and storage manufacturers, power system planners, consultants and regulatory authorities. It supports design of operational procedures, EMS specifications, protection coordination studies, commissioning plans and training for operational staff.

Related standards

Part of the IEC 62898 microgrids series. Closely related documents include IEC TS 62898-1 (Guidelines for microgrid projects planning and specification), the Part 3 family (technical requirements) such as IEC TS 62898-3-1 (Protection and dynamic control), IEC TS 62898-3-2 (Energy management systems / technical requirements), IEC TS 62898-3-3 (Self‑regulation of dispatchable loads) and IEC TS 62898-3-4 (Monitoring and control systems). Users should also consult applicable IEC / national standards on DER interconnection, power quality, protection and communication protocols when implementing microgrid solutions.

Keywords

Microgrids, operation, energy management system (EMS), distributed energy resources (DER), electrical energy storage, anti‑islanding, synchronization, reclosing, protection, commissioning, maintenance, power quality, AC microgrids, low voltage, medium voltage.

FAQ

Q: What is this standard?

A: IEC TS 62898-2 is a Technical Specification titled "Microgrids — Part 2: Guidelines for operation" that provides non‑normative guidance on operating AC microgrids. The 2023 release is an amendment to the original 2018 edition and is available as a consolidated edition.

Q: What does it cover?

A: It covers operational modes and mode transfer, EMS and control strategies, communication and monitoring practices, energy storage management, protection principles (including anti‑islanding, synchronization and reclosing), power quality, and commissioning/maintenance/testing procedures for AC microgrids at low and medium voltage. It does not cover DC microgrids.

Q: Who typically uses it?

A: Distribution utilities, microgrid operators, system integrators, equipment manufacturers (DER and storage), engineering consultants, test laboratories and regulators use the document to inform operational requirements, EMS specifications, protection coordination and commissioning activities.

Q: Is it current or superseded?

A: The 2018 Technical Specification was amended in 2023 (Amendment 1 published 7 November 2023). A consolidated edition incorporating the amendment is available (consolidated edition 1.1, 2023). The document is published as active; users should check the IEC catalogue for the latest status and any further amendments.

Q: Is it part of a series?

A: Yes. IEC TS 62898 is a multi‑part series addressing microgrids. Part 1 covers planning and specification, Part 2 covers operation (this document), and Part 3 (and its subparts) covers technical requirements for protection, EMS, dispatchable loads, monitoring and control systems.

Q: What are the key keywords?

A: Microgrids, operation, EMS, distributed energy resources, energy storage, anti‑islanding, synchronization, protection, commissioning, power quality, AC microgrids.