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GB/T 14598.181-2021Measuring relays and protection equipment - Part 181: Functional requirements for frequency protection (English PDF)

量度继电器和保护装置第181部分：频率保护功能要求

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Issued by

State Administration for Market Regulation, China National Standardization Administration

Level / Type

National · Recommended

Issue date

December 31, 2021

Implementation date

July 1, 2022

Scope

GB/T 14598.181-2021 is the English-translated version of 量度继电器和保护装置第181部分：频率保护功能要求.

GB/T 14598.181-2021 is the Chinese standard "Measuring relays and protection equipment - Part 181: Functional requirements for frequency protection".

Its scope clause reads: This document specifies the minimum requirements for frequency protection functions and performance evaluation, as well as the way to record and publish performance test results: This document covers protection functions based on frequency measurement or frequency rate-of-change measurement, including frequency protection using additional blocking elements: This document specifies factors affecting accuracy under steady-state conditions and performance characteristics under dynamic conditions, as well as methods for verifying performance characteristics and Test method for accuracy: The frequency protection functions involved in this document are shown in Table 1: Table 1 Frequency Protection Names Frequency protection function IEEEStdC37:2 function code IEC 61850-7-4 logical node Low frequency protection 81U PTUF Over frequency protection 81O PTOF Frequency Rate of Change Protection 81R PFRC This document applies to the frequency protection function embedded in the relay protection device, and also applies to other equipment (such as the tripping list of the low-voltage circuit breaker) frequency protection function in solar cells, photovoltaic inverters, energy storage system inverters): This document does not include synchronization function, synchronization detection function: This document does not specify functional descriptions of additional characteristics normally associated with frequency protection functions, such as low voltage blocking, df/dt or deltaf/deltat Monitoring, current monitoring or power monitoring (f/P function): This document only deals with the effect of these additional features on the frequency protection function: This document does not involve the frequency measurement output and frequency change rate measurement output provided by the protection device: Furthermore, this document does not explicitly cover frequency protection with current as input excitation, but the principles specified in this document can be extended to this class application to provide guidance: General requirements for measuring relays and protective devices are given in IEC 60255-1:.

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Document preview — GB/T 14598.181-2021

National Standard of the People's Republic of China

Classification: K 45

Issued by: State Administration for Market Regulation, China National Standardization Administration

Preface
Introduction
1 Scope
2 Normative references
3 Terms and Definitions
4 Functional Specifications
5 Performance Specifications
6 Functional test method
7 Documentation Requirements
Appendix A (normative) Test signal expression for constant frequency change rate (df/dt)
Appendix B (normative) mean, median and mode calculations
Appendix C (Informative) Examples of Frequency Measurements and Calculations
Appendix D (Informative) Performance with Interharmonics
Appendix E (Informative) Realization Method of Frequency Sudden Change under Voltage Continuous Waveform

1 Scope

This document specifies the minimum requirements for frequency protection functions and performance evaluation, as well as the way to record and publish performance test results:

This document covers protection functions based on frequency measurement or frequency rate-of-change measurement, including frequency protection using additional blocking elements:

This document specifies factors affecting accuracy under steady-state conditions and performance characteristics under dynamic conditions, as well as methods for verifying performance characteristics and

Test method for accuracy:

The frequency protection functions involved in this document are shown in Table 1:

Table 1 Frequency Protection Names

Frequency protection function IEEEStdC37:2 function code IEC 61850-7-4 logical node

Low frequency protection 81U PTUF Over frequency protection 81O PTOF Frequency Rate of Change Protection 81R PFRC This document applies to the frequency protection function embedded in the relay protection device, and also applies to other equipment (such as the tripping list of the low-voltage circuit breaker) frequency protection function in solar cells, photovoltaic inverters, energy storage system inverters):

This document does not include synchronization function, synchronization detection function:

This document does not specify functional descriptions of additional characteristics normally associated with frequency protection functions, such as low voltage blocking, df/dt or deltaf/deltat

Monitoring, current monitoring or power monitoring (f/P function): This document only deals with the effect of these additional features on the frequency protection function:

This document does not involve the frequency measurement output and frequency change rate measurement output provided by the protection device:

Furthermore, this document does not explicitly cover frequency protection with current as input excitation, but the principles specified in this document can be extended to this class application to provide guidance:

General requirements for measuring relays and protective devices are given in IEC 60255-1:

2 Normative references

The contents of the following documents constitute essential provisions of this document through normative references in the text: Among them, dated citations documents, only the version corresponding to that date applies to this document; for undated references, the latest edition (including all amendments) applies to this document:

IEC 60050-103 International Electrotechnical Terminology Part 103: Mathematical functions (International Electrotechnical Vocabu- lary-Part 103:Mathematics-Functions)

IEC 60050-447 International Electrotechnical Terminology Part 447: Measuring relays (International Electrotechnical Vocabu- lary-Part 447:Measuringrelays)

IEC 60050-601 International Electrotechnical Terminology Part 601: General Terminology for Power Generation, Transmission and Distribution (International Electro- technicalVocabulary-Part 601:Generation,transmissionanddistributionofelectricity-General)

IEC 60255-1 Measuring relays and protective devices - Part 1: General requirements (Measuringrelaysandprotectione-

DL/T 540 | GB/T 38953 | GB/T 37155.2 | GB/T 14598.27 | GB/T 14598.26 | GB/T 14598.2 | […]

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 125 pages — is available in the English PDF.

Referenced standards

Normative references

IEC 60050 · IEC 60255

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