GB/T 14598.1871-2024Measuring relays and protection equipment - Part 187-1: Functional requirements for differential protection - Restrained and unrestrained differential protection of motors, generators and transformers (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 for standardization documents" Drafting.

This document is part 1871 of GB/T 14598 "Measuring relays and protection devices". GB/T 14598 has been published for the following part.

---GB/T 14598.2 Measuring relays and protection devices Part 1: General requirements;

---GB/T 14598.3 Electrical relays Part 5: Insulation coordination requirements and tests for measuring relays and protection devices;

---GB/T 14598.8 Electrical relays Part 20: Protection systems;

---GB/T 14598.23 Electrical relays Part 21: Vibration, shock, impact and earthquake of measuring relays and protective devices Test Part 3: Earthquake Test;

---GB/T 14598.24 Measuring relays and protection devices Part 24: Transient data exchange in power systems (COMTRADE) Common Format;

---GB/T 14598.26 Measuring relays and protection devices Part 26: Electromagnetic compatibility requirements;

---GB/T 14598.27 Measuring relays and protection devices Part 27: Product safety requirements;

---GB/T 14598.118 Measuring relays and protection devices Part 118: Synchronous phasor measurement in power systems;

---GB/T 14598.121 Measuring relays and protection devices Part 121: Requirements for distance protection functions;

---GB/T 14598.127 Measuring relays and protection devices Part 127: Over/undervoltage protection function requirements;

---GB/T 14598.149 Measuring relays and protection devices Part 149: Functional requirements of electric heating relays;

---GB/T 14598.151 Measuring relays and protection devices Part 151: Over/under current protection function requirements;

---GB/T 14598.181 Measuring relays and protection devices Part 181: Requirements for frequency protection functions;

---GB/T 14598.300 General technical requirements for transformer protection devices;

---GB/T 14598.301 Technical requirements for continuous recording devices in power systems;

---GB/T 14598.302 Technical requirements for arc protection devices;

---GB/T 14598.303 General technical requirements for digital integrated motor protection devices;

---GB/T 14598.1871 Measuring relays and protection devices Part 187-1.Functional requirements for differential protection of motors, Generator and transformer ratio restraint differential protection and differential quick-break protection.

This document is equivalent to IEC 60255-187-1:2021 "Measuring relays and protection devices Part 187-1.Functions of differential protection Requirements for ratio brake differential protection and differential quick-break protection for motors, generators and transformers.

The following minimal editorial changes were made to this document.

---Correct the relevant contents of 6.4.4.2, 6.4.4.3, 6.4.4.4, 6.4.5.2 in IEC, and change "When a fault occurs, the voltage of system A and the voltage of system B are equal" to the phase angle between the voltage of system A and the voltage of fault A should be consistent with the state before fault (load)" is corrected to "When fault occurs, the phase angle between the voltage of system A and the voltage of fault A should be consistent with the state before fault (load)" the front (load) state remains consistent";

--- Correct the relevant content of IEC 6.4.7.2, and correct "the total number of tests is 2560 times" to "the total number of tests is 2048 times";

--- Corrected footnote c of table 43 in 6.4.7.3 of IEC, adding "magnetizing impedance is infinite";

---Correct the relevant content of IEC 6.8.3.1, and correct "the input current can be obtained by equation (17) to equation (22)" to "the input current is obtained by Formula (16)~Formula (21) to obtain";

---Correct the relevant content of E.3.3 in IEC, and change "CT1" to "CT2".

Introduction

The purpose of formulating GB/T 14598 is to stipulate unified principles that are consistent with the above characteristics. These principles are applicable to power generation, transmission and distribution systems.

Measuring relays and protection devices used in systems. GB/T 14598 currently consists of 18 parts.

--- Part 2: General requirements for measuring relays and protection devices. The purpose is to specify measuring relays and protection devices and the General rules and requirements for power system protection schemes consisting of these devices such as control, monitoring and process interface equipment.

--- Part 3: Insulation coordination requirements and tests for measuring relays and protection devices. The purpose is to specify the insulation coordination requirements for measuring relays and protection devices.

General requirements for insulation coordination of devices, including how to select electrical clearances and creepage distances, voltage tests, insulation resistance measurements, etc.

--- Part 8: Protection system. The purpose is to specify the performance requirements of the entire protection system and its components, applicable to all types of protection Protective devices and devices connected to the protective devices that have an impact on them.

--- Part 23: Earthquake test. The purpose is to specify the test methods, test conditions, Test severity levels, test procedures and acceptance criteria.

--- Part 24: Common format for power system transient data exchange (COMTRADE). The purpose is to define a common data Interchange format, used to store data files and exchange media for various types of faults, tests, and simulations. Defines the general purpose of data exchange format, which is conducive to improving the analysis, testing, evaluation and simulation of power systems and their protection and control measures under fault disturbance conditions.

Automated level.

--- Part 26: Electromagnetic compatibility requirements. The purpose is to specify the electromagnetic compatibility requirements for measuring relays and protection devices, including electromagnetic Emissions and Immunity.

--- Part 27: Product safety requirements. The purpose is to specify the basic safety requirements for measuring relays and protection devices so that the risk of fire, electric shock or injury to the user is minimized. This standard also applies to devices used with measuring relays and protective devices Test and auxiliary devices used.

--- Part 118: Power system synchronized phasor measurement. The purpose is to specify the performance classification of synchronized phasor measurement and the performance of each performance Evaluation methods and performance indicators for steady-state performance and dynamic performance of categories.

--- Part 121: Distance protection functional requirements. The purpose is to specify the functions and performance evaluation of distance protection on power system lines.

minimum requirements for pricing, and how performance test results should be recorded and published.

--- Part 127: Over/undervoltage protection function requirements. The purpose is to specify the minimum requirements for over/undervoltage relays, including protection Specifications of functions, measurement characteristics and delay characteristics.

--- Part 149: Functional requirements for electric thermal relays. The purpose is to specify the minimum requirements for electric thermal relays, including protection functions, measurement Specifications for quantitative characteristics and test methods.

--- Part 151: Over/under current protection function requirements. The purpose is to specify the minimum requirements for over/under current relays, including protection Specifications of functions, measurement characteristics and delay characteristics.

--- Part 181: Frequency protection function requirements. The purpose is to specify the minimum requirements for frequency protection functions and performance evaluation, and to record Methods for recording and publishing performance test results.

--- Part 300: General technical requirements for transformer protection devices. The purpose is to specify the technical requirements, test Methods, inspection rules, marking labels, packaging, transportation and storage requirements.

--- Part 301: Technical requirements for continuous recording devices in power systems. The purpose is to specify the technical requirements for continuous recording devices in power systems.

Requirements, test methods, inspection rules, marking and labeling, packaging, transportation and storage, etc.

--- Part 302: Technical requirements for arc protection devices. The purpose is to specify the technical requirements, test methods, inspection and Inspection rules, marking and labeling, packaging, transportation and storage requirements.

--- Part 303: General technical requirements for digital motor integrated protection devices. The purpose is to specify the general technical requirements for digital motor integrated protection devices.

General technical requirements, test methods, inspection rules, marking labels, packaging, transportation and storage requirements for protective devices.

--- Part 1871: Functional requirements for differential protection of motors, generators and transformers Ratio brake differential protection and differential quick trip protection the purpose is to define the functions and performance evaluation of (longitudinal) differential protection for AC motors, generators and transformers.

Minimum price requirement.

This document provides more detailed requirements for the function and performance evaluation of differential protection for motors, generators and transformers, which is conducive to promoting the design and to promote the technological progress of equipment manufacturers, improve product quality, integrate into the international standard trade system, and facilitate the entry of products into the international market; guide third parties Testing agencies carry out corresponding testing activities to facilitate end users to select products that meet their technical requirements.

Measuring relays and protective devices Part 187-1.

The differential protection function requires motors, generators and Transformer ratio restraint differential protection and differential quick-break protection

1 Scope

This document specifies the minimum requirements for the functions and performance evaluation of (longitudinal) differential protection for AC motors, generators and transformers.

This document also specifies how the performance test results are to be recorded and published.

This document applies to differential protection functions whose operating characteristics can be defined on the differential current-restraint current coordinate plane, including protection functions Specifications, measurement characteristics, excitation compensation, additional braking or blocking (for overexcitation and inrush current), starting and delay characteristics. This document also applies to Used for differential quick-break protection function, it is usually combined with ratio brake differential protection function to form a differential relay.

This document specifies factors affecting accuracy under steady-state conditions and performance characteristics under dynamic conditions.

This document also specifies the requirements for current transformers for protection functions.

The functions are as follows.

IEEE/ANSIC37.2 Function Code IEC 61850-7-4 Logical Node Transformer differential protection 87T PDIF Motor differential protection 87M PDIF Generator differential protection 87G PDIF Zero sequence differential protection (Also called zero phase differential protection, REF) 87N PDIF Surge Braking or Surge Blocking PHAR Overexcitation braking or overexcitation blocking PHAR this document does not detail other additional functions associated with the ratio differential relay, such as current transformer secondary circuit supervision (CTS), closing Gate-on-Fault Protection (SOTF) and Geomagnetic Induction Current (GIC) detection.

This document does not involve bus differential protection (including high impedance bus differential protection, low impedance bus differential protection) and line differential protection.

The document does not explicitly cover generator incomplete longitudinal differential protection, generator split phase transverse differential protection, self-balancing or magnetic balance differential protection, Phase transformer differential protection, zero-sequence phase ratio protection (also known as zero-phase direction protection), railway traction transformer differential protection, converter transformer differential protection However, the principles of this document can be used as a reference for implementation.

General requirements for measuring relays and protection devices are specified in IEC 60255-1.

2 Normative references

The contents of the following documents constitute the essential clauses of this document through normative references in this document.

For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to this document.

equipment-Part 1: Common requirements) Note. GB/T 14598.2-2011 Measuring relays and protection devices Part 1: General requirements (IEC 60255-1.2009IDT)