GB/T 42001-2022 English PDF

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GB/T 42001-2022: Altitude correction method for external insulation flashover voltage of high voltage power transmission projects
Status: Valid

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Basic data

Standard ID: GB/T 42001-2022 (GB/T42001-2022)
Description (Translated English): Altitude correction method for external insulation flashover voltage of high voltage power transmission projects
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: F21
Classification of International Standard: 29.080.01
Word Count Estimation: 14,114
Date of Issue: 2022-10-14
Date of Implementation: 2023-05-01
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 42001-2022: Altitude correction method for external insulation flashover voltage of high voltage power transmission projects

---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.
Altitude correction method for external insulation flashover voltage of high voltage power transmission projects ICS 29.080.01 CCSF21 National Standards of People's Republic of China High voltage power transmission and transformation project external insulation discharge voltage altitude Correction method Published on 2022-10-12 2023-05-01 Implementation State Administration for Market Regulation Released by the National Standardization Administration directory Preface III 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 External insulation discharge voltage altitude correction procedure 1 5 Altitude correction for air gap discharge voltage of transmission line 2 6 Altitude correction of air gap discharge voltage in substation 4 7 Altitude correction of air gap discharge voltage of converter station 5 8 Altitude correction of insulator outer insulation discharge voltage 6

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" drafted. Please note that some content of this document may be patented. The issuing agency of this document assumes no responsibility for identifying patents. This document is proposed and managed by China Electricity Council. This document is drafted by. China Electric Power Research Institute Co., Ltd., China Southern Power Grid Research Institute Co., Ltd., North China Electric Power University Xue, China Electric Power Engineering Consulting Group Corporation Southwest Electric Power Design Institute Co., Ltd., State Grid Qinghai Electric Power Company Electric Power Research Institute, State Grid Tibet Electric Power Company Electric Power Research Institute, State Grid Shanxi Electric Power Company Electric Power Research Institute. The main drafters of this document. Ding Yujian, Huang Ruiping, Huo Feng, Zhou Jun, Gu Chen, Yao Xiuyuan, Yu Xinzhe, Su Yu, Geng Jianghai, Yue Song, Wang Shengfu, Gao Chao, Yang Yun, Liang Ming, Du Yijun, Tian Liang, Nan Jing, Yu Hua, Wang Xinwei. High voltage power transmission and transformation project external insulation discharge voltage altitude Correction method

1 Scope

This document describes the air gap discharge of 110kV~750kV and ±400kV~±800kV transmission lines, substations, converter stations, etc. Altitude correction method for electric voltage and insulator pollution flashover discharge voltage. This document is applicable to the altitude correction of the external insulation discharge voltage of power transmission and transformation projects in areas with an altitude of 5000m and below, and the altitude is 5000m. Refer to the above regions for use.

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. GB/T 311.1 Insulation Coordination Part 1.Definitions, Principles and Rules GB/T 16927.1 High Voltage Test Technology Part 1.General Definitions and Test Requirements GB/T 16927.2 High Voltage Test Technology Part 2.Measurement System

3 Terms and Definitions

The following terms and definitions apply to this document. 3.1 External insulationexternalinsulation The exposed surface of the air gap or solid insulation of the equipment exposed to the voltage. 3.2 high altitude area Areas with an altitude of not less than 1000m. 3.3 According to the difference in dielectric strength between the average atmospheric conditions at the altitude and the standard reference atmospheric conditions during operation, the insulation coordination withstand voltage or discharge Factor for electrical voltage correction. 3.4 Atmospheric conditions for which the standardized withstand voltage applies. Note. The standard reference atmospheric conditions are temperature 20°C, pressure 101.3kPa, and absolute humidity 11g/m3.

4 External insulation discharge voltage altitude correction procedure

4.1 Positive conversion Through altitude correction, the external insulation discharge voltage of power transmission and transformation projects in high altitude areas can be converted to the standard reference atmospheric condition of 0m above sea level ......

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