GB/T 40532-2021Guide on technology for power system substation-area circuit breaker failure (dead-zone) protection (English PDF)

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.

Introduction

As large-capacity UHV DC transmission projects are put into operation one after another, the interconnection between regional power grids is becoming closer, AC and DC, transmission and receiving end, upper and lower power grids The electromagnetic coupling between them has been continuously enhanced, and the characteristics of system integration have become increasingly prominent. When a circuit breaker failure (dead zone) fault occurs in the UHV DC receiving end power grid, If the fault cannot be removed in time, it will cause the UHV DC continuous commutation failure in severe cases, which will bring great impact to the safe and stable operation of the power grid. threaten.

The existing circuit breaker failure (dead zone) protection cannot meet the limit cut-off time required for power grid stability. Failure of the station domain specified in this document (Dead zone) protection is an application of the station domain protection system. It adopts a systematic protection concept to collect multi-interval analog and switch signals of the whole station.

Information, the use of fiber channel for rapid information exchange between stations to achieve comprehensive discrimination, can isolate the fault in the shortest time under the existing technical Most likely to meet the system stability requirements.

This document specifies the functional configuration requirements and technical principles of the station failure (dead zone) protection technology, and proposes the station failure (dead zone) protection.

The general structure of protection is helpful to the promotion and application of site failure (dead zone) protection across the country, and has guidance for the development of subsequent site protection. Guide meaning.

1 Scope

This document stipulates the overall requirements, functions and configuration, technical requirements, auxiliary equipment and two Requirements and tests of the secondary circuit.

This document is applicable to the protection of station failure (dead zone) in power plants and substations with dual circuit breaker wiring such as 3/2 circuit breakers. Other types Refer to the use of the protection of the wiring form.

2 Normative references

The content of the following documents constitutes an indispensable clause of this document through normative references in the text. Among them, dated quotations Only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to this document.

GB/T 2900.1 Basic terminology for electrical engineering

GB/T 2900.17 Electrotechnical terminology measuring relay

GB/T 2900.49 Electrician Terminology Power System Protection

GB/T 7261 Basic test methods for relay protection and safety automatic devices

GB/T 14285 Technical Regulations for Relay Protection and Safety Automatic Equipment

GB/T 14598.24 Measuring relays and protection devices Part 24: Power system transient data exchange (COMTRADE) communication Use format

GB/T 20840.8 Transformer Part 8: Electronic Current Transformer

GB/T 21711.1 Basic Electromechanical Relay Part 1: General Principles and Safety Requirements

GB/T 25931 Accurate clock synchronization protocol for network measurement and control system

GB/T 26399 Technical Guidelines for Power System Security and Stability Control

GB/T 26864 Power System Relay Protection Product Dynamic Model Test

GB/T 34122 220kV~750kV Power Grid Relay Protection and Safety Automatic Device Configuration Technical Specification

DL/T 282 Technical Conditions of Merging Unit

DL/T 364 Fibre Channel Transmission Protection Information General Technical Conditions

DL/T 478 General technical requirements for relay protection and safety automatic devices

DL/T 860 (all parts) Electric power automation communication network and system

DL/T 1241 Technical Specification for Power Industry Ethernet Switch

DL/T 1782 Information Specification for Substation Relay Protection

The physical/electrical characteristics of the ITU-T G.703 series of digital interfaces (Physical/electricalcharacteristicsofhierarchical digitalinterfaces)

3 Terms and definitions

The terms and definitions defined in GB/T 2900.1, GB/T 2900.17, GB/T 2900.49 and DL/T 478 and the following terms and definitions apply to this document.