IEC TS 63291-2:2023 PDF

Overview

IEC TS 63291-2:2023 provides parameter lists and guidance for functional specifications of multi‑vendor high voltage direct current (HVDC) grid systems and their connected converter stations. Part 2 focuses on the parameter lists needed for planning, specifying and executing HVDC grids - systems with more than two HVDC stations on a common DC circuit (radial, meshed or hybrid topologies). The technical specification applies mainly to high‑voltage DC systems (typically nominal DC voltages > 50 kV) and complements other IEC and Cigré guidance for HVDC and point‑to‑point links.

Key topics and technical requirements

The document organizes parameters and requirements across the full HVDC grid lifecycle, including:

• HVDC grid characteristics
  • Circuit topologies (radial/meshed), availability and reliability attributes
  • Nominal and temporary DC voltages, insulation coordination and short‑circuit characteristics
• Coordination of HVDC and AC systems
  • AC/DC power flow optimisation, converter operational modes and ancillary services
• HVDC grid control
  • Core closed‑loop controls, controller hierarchy (internal converter, DC node, coordinated grid control), open‑loop sequences and propagation of information
• HVDC grid protection
  • Fault separation strategies, protection zones, DC protection functions and communication requirements
• AC/DC converter stations
  • Station types, main‑circuit design considerations, control interfaces, dynamic behavior and protection configuration
• HVDC installations
  • DC switching stations, transmission line requirements, installation controls and protection
• Studies, models and testing
  • Planning/design/extension studies, model requirements for interoperability and testing

The specification also identifies topics proposed for future work (e.g., DC/DC converter stations) and references other IEC/Cigré documents where applicable.

Practical applications and users

IEC TS 63291-2:2023 is intended for professionals involved in design, procurement, integration and operation of HVDC grids, including:

• Utility planners and transmission system operators (TSOs)
• OEMs and multi‑vendor integrators of converters, switchgear and protection systems
• Protection and control engineers specifying functional performance and interoperability
• Consultants performing HVDC grid studies, modelling and testing
• Regulators and standards committees defining compliance and interface requirements

Practical uses include preparing functional specifications, defining vendor interoperability parameters, coordinating AC/DC interfaces, designing protection schemes, and ensuring consistent testing and commissioning practices.

Related standards

• IEC TS 63291-1 (guideline context)
• IEC TR 63363‑1 and relevant Cigré reports (referenced for background on HVDC technology)

Keywords: IEC TS 63291-2:2023, HVDC grid, parameter lists, HVDC control, HVDC protection, converter stations, DC switching station, HVDC transmission lines, functional specifications.