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GB/T 40596-2021: Technical rules for automatic under-frequency load shedding in electric power systems
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 40596-2021 | English | 279 |
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Technical rules for automatic under-frequency load shedding in electric power systems
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GB/T 40596-2021
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Basic data | Standard ID | GB/T 40596-2021 (GB/T40596-2021) | | Description (Translated English) | Technical rules for automatic under-frequency load shedding in electric power systems | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | F21 | | Word Count Estimation | 14,171 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 40596-2021: Technical rules for automatic under-frequency load shedding in electric power systems
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Technical rules for automatic under-frequency load shedding in electric power systems
ICS 29.020
CCSF21
National Standards of People's Republic of China
Technical regulations for automatic low-frequency load shedding of power systems
powersystems
Released on 2021-10-11
2022-05-01 implementation
State Administration of Market Supervision and Administration
Issued by the National Standardization Management Committee
Table of contents
Foreword Ⅰ
1 Scope 1
2 Normative references 1
3 Terms and definitions 1
4 General requirements 1
5 Basic requirements for automatic low frequency load shedding 2
6 Setting calculation of automatic low frequency load shedding 2
7 Configuration and setting of automatic low frequency load shedding 3
8 Setting of low-frequency splitting device 4
Appendix A (informative) Low-frequency load reduction plan management process 5
Appendix B (informative) Calculation of dynamic process of frequency change of constant output power generator with concentrated load 6
Appendix C (Informative) Calculation of the dynamic process of system frequency changes after the rated value is exceeded 8
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.
Please note that some of the contents of this document may involve patents. The issuing agency of this document is not responsible for identifying patents.
This document was proposed by the China Electricity Council.
This document is under the jurisdiction of the National Grid Operation and Control Standardization Technical Committee (SAC/TC446).
Drafting organizations of this document. State Grid Corporation of China National Electric Power Dispatching Control Center, China Electric Power Research Institute Co., Ltd., China
China Southern Power Grid Co., Ltd. Power Dispatching Control Center, State Grid Co., Ltd. East China Branch, Guangdong Power Grid Co., Ltd., State Grid
Shaanxi Electric Power Company, State Grid Gansu Electric Power Company, Northwest Branch of State Grid Co., Ltd., State Grid Ningxia Electric Power Co., Ltd., State Grid
Northeast branch of the company, Central China branch of State Grid Corporation.
The main drafters of this document. He Jingbo, Guo Qiang, Bu Guangquan, Su Yinsheng, Zhao Bing, Yin Yonghua, Wang Shanshan, Ye Jian, Xu Shiyun, Zhao Qiang,
Jin Yiding, Li Jianhua, Pan Xiaojie, Wu Guanglu, Yue Han, Zhang Zhenyu, Huo Chao, Chen Xinghua, Zhou Yingkun, Miao Yuancheng, Wang Jianbo, Xi Gongwei, Jia Lin,
Ding Haoyin, Bian Hongyu, Tan Beisi, Wang Kefei, Ke Xianbo, Liu Yang, Zhang Gang, Guo Deyang, Zhang Libo.
Technical regulations for automatic low-frequency load shedding of power systems
1 Scope
This document specifies the basic principles and requirements for the configuration and setting of automatic low-frequency load shedding devices for power systems (hereinafter referred to as "systems").
Basic assumptions and methods of automatic low-frequency load shedding calculation.
This document is applicable to the automatic low-frequency load reduction technical measures involved in system planning and design, production operation, and scientific research and manufacturing.
2 Normative references
The contents of the following documents constitute the indispensable clauses of this document through normative references in the text. Among them, dated quotations
Only the version corresponding to that date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to
This document.
GB/T 15945 Power quality power system frequency deviation
GB/T 31464 Grid Operation Guidelines
GB 38755 Safety and Stability Guidelines for Power Systems
3 Terms and definitions
The following terms and definitions defined in GB/T 15945, GB/T 31464 and GB 38755 apply to this document.
3.1
Load power loadcapacity
The size of the load when the system is running.
3.2
Remaining power generation
The total amount of generating power still running in the system after the occurrence of active power shortage.
3.3
Nominalfrequency
The nominal frequency selected by the system design.
3.4
Frequencycolapse
A serious system accident caused by a vicious drop in frequency.
4 General requirements
4.1 The system should reasonably arrange the sequence of automatic low-frequency load shedding and the amount of load shedding. When the whole system or the partial power shortage after splitting
At the same time, a sufficient amount of load should be automatically subtracted according to the frequency drop in a planned way, so as to avoid long-term large-scale blackouts and damage to important users.
Catastrophic power outages (including plant power) minimize load loss as much as possible.
4.2 When the system's active power shortage suddenly occurs and the system frequency is severely reduced, the action of the automatic low-frequency load shedding device should be relied on to make
The load capacity reserved for operation is compatible with the generating capacity in operation. In view of the combination of system generator sets (thermal power, hydropower, nuclear power, gas turbine
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