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GB/T 40865-2021Terminology for voltage source converter based high voltage direct current (VSC-HVDC) transmission (English PDF)

柔性直流输电术语

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

October 11, 2021

Implementation date

May 1, 2022

Scope

GB/T 40865-2021 is the English-translated version of 柔性直流输电术语.

GB/T 40865-2021 is the Chinese national vocabulary for high voltage direct current transmission based on voltage source converters, known as flexible DC transmission or VSC-HVDC.

It defines general terms such as converter, voltage source converter, converter unit and converter station, then terms for topological structures and wiring modes, the operating states of the voltage source converter and the main primary equipment of a converter station.

Further clauses cover the topology and components of voltage source converters and of DC circuit breakers, and the terms of the control system and the protection system, with an alphabetical index.

It applies to flexible DC transmission systems based on voltage source converters, including DC grids and back-to-back systems, but not to systems with grid-commutated converters. It was issued on 11 October 2021 and has applied since 1 May 2022.

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Document preview — GB/T 40865-2021

National Standard of the People's Republic of China

ICS: 29.020
Classification: F 21

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Foreword
1 Scope
2 Normative references
3 General terms
4 Topological structure and wiring mode
5 Status of the voltage source converter
6 Main primary equipment of converter station
7 Topology and composition of voltage source converter
8 Topology and composition of DC circuit breaker
9 Flexible DC transmission control system
10 Flexible DC Transmission Protection System

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1: Structure and Drafting Rules of Standardization Documents" Drafting.

1 Scope

This document defines the terms and definitions related to flexible DC transmission.

This document applies to flexible DC transmission systems based on voltage source converters. Flexible DC grid and flexible DC back-to-back system can participate Follow the execution.

This document does not apply to DC transmission systems based on grid-commutated converters.

2 Normative references

There are no normative references in this document.

3 General terms

3.1 Converter

A device for converting AC power to DC power or converting DC power to AC power, connected to three AC terminals and two Between two DC terminals.

3.2 Voltage source converter

A three-phase bridge-connected converter composed of fully-controlled power electronic devices, usually composed of centralized or distributed DC capacitors (7.16) Provide a smooth DC voltage.

3.3 Flexible DC transmission

DC transmission technology based on voltage source converter (3.2).

Note: HVDC is the abbreviation for High Voltage Direct Current.

3.4 Converter unit

In the DC system, an inseparable operating unit composed of all the equipment between the AC bus and the DC bus, including the converter and its control Control equipment, connection (conversion) transformer (6.8), necessary protection and switchgear and auxiliary equipment for commutation (if any). see picture 1.

3.5 [High voltage direct current] converter station

A part of the HVDC system (3.7), consisting of all primary equipment, secondary equipment, auxiliary facilities and corresponding It is composed of buildings, etc.

Note: Primary equipment includes converters and connection (converter) transformers, and secondary equipment includes control and protection equipment.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 30 pages — is available in the English PDF.

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