GB/T 40592-2021Technical rules for automatic over-frequency generator tripping in electric power system (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.

1 Scope

This document specifies the basic requirements, configuration principles, and setting calculations for the configuration and configuration of automatic high-frequency cut-off generator sets in the power system.

And the principle of coordinated configuration with unit high frequency protection and steam turbine overspeed protection.

This document is suitable for high-frequency control of large power grids and high-frequency control of isolated power grids that are disconnected from the main grid after an accident. Outgoing local power grid and Enterprise power grids with self-supplied power plants can be implemented by reference.

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 38755 Safety and Stability Guidelines for Power Systems

GB/T 38969 Technical Guidelines for Power System

DL/T 1234 Technical Specification for Power System Security and Stability Calculation

3 Terms and definitions

The following terms and definitions apply to this document.

4 General requirements

4.1 The automatic high-frequency cut-off of the power system (hereinafter referred to as the high-frequency cut-off) measure belongs to the third line of defense for the stable operation of the power system.

This is an emergency control measure taken to prevent the system frequency from rising sharply after a serious failure of the power grid.

4.2 When the power system has excessive active power, the transient frequency of the system exceeds the normal control range, and may cause system stability problems At the same time, the configuration of high-frequency cutting device should be considered.

4.3 The power system high-frequency cut-off configuration should include different types of generator set combinations, grid structure and operation mode, etc.

4.4 The power system high-frequency cutting plan should be formulated, organized and implemented by the power grid operation department, and checked regularly. When the system condition has When major changes are made, it should be reconfigured.