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GB/T 26218.4-2019: Selection and dimensioning of high-voltage insulators intended for use in polluted conditions -- Part 4: Insulators for d.c. systems
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| GB/T 26218.4-2019 | English | 679 |
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Selection and dimensioning of high-voltage insulators intended for use in polluted conditions -- Part 4: Insulators for d.c. systems
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GB/T 26218.4-2019
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Basic data | Standard ID | GB/T 26218.4-2019 (GB/T26218.4-2019) | | Description (Translated English) | Selection and dimensioning of high-voltage insulators intended for use in polluted conditions -- Part 4: Insulators for d.c. systems | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | K48 | | Classification of International Standard | 29.080.10 | | Word Count Estimation | 34,358 | | Date of Issue | 2019-12-10 | | Date of Implementation | 2020-07-01 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 26218.4-2019: Selection and dimensioning of high-voltage insulators intended for use in polluted conditions -- Part 4: Insulators for d.c. systems
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(Selection and sizing of high-voltage insulators for use in dirty conditions. Part 4. Insulators for DC systems)
ICS 29.080.10
K48
National Standards of People's Republic of China
High voltage insulators used in dirty conditions
Selection and sizing
Part 4. Insulators for DC systems
Selectionanddimensioning ofhigh-voltageinsulatorsintendedforuseinpoluted
conditions-Part 4. Insulatorsford.c.systems
2019-12-10 release
2020-07-01 implementation
State Administration of Market Supervision
Published by the National Standardization Management Committee
Contents
Foreword III
1 Scope 1
2 Normative references 1
3 Terms and definitions, acronyms 2
3.1 Terms and definitions 2
3.2 Abbreviations 2
4 Principle 3
4.1 General 3
4.2 Design Process 3
5 Material 5
6 Site pollution level determination 5
6.1 Input data 5
6.2 Site pollution level 5
6.3 Fouling characteristics 6
6.4 Direct AC Pollution Ratio 7
6.5 AC and DC Site Pollution Degree Relationship 8
7 Outer insulation configuration 8
7.1 Step 8
7.2 Amendments to ESDDdc 10
7.3 Amendments to U50 10
7.4 Adjusting the number of pieces or length 12
7.5 Insulation configuration 13
8 Insulator outline parameter requirements 13
8.1 Overview 13
8.2 Alternating Umbrella and Umbrella Extension 13
8.3 Umbrella spacing 13
8.4 Ratio of Umbrella Spacing to Umbrella Extension 14
8.5 shortest distance between umbrellas 14
8.6 Ratio of creep distance to clearance distance 15
8.7 Umbrella inclination 15
8.8 Creepage coefficient 16
9 Design Verification 16
9.1 General principles 16
9.2 Operating experience 16
9.3 Laboratory test 16
Appendix A (Informative) Site Pollution Test of DC Lines and Converter Stations 17
Appendix B (informative) Example of DC line and converter station insulation configuration 23
Appendix C (Informative) Example 25 Survey and Indication of Pollution of Insulators in Polluted Areas
Appendix D (informative) Operating experience 28
Foreword
GB/T 26218 "Selection and sizing of high-voltage insulators used in dirty conditions" includes 4 parts.
--- Part 1. Definition, information and general principles;
--- Part 2. Porcelain and glass insulators for AC systems;
--- Part 3. Composite insulators for AC systems;
--- Part 4. Insulators for DC systems.
This part is Part 4 of GB/T 26218.
This section is drafted in accordance with the rules given in GB/T 1.1-2009.
Please note that some elements of this document may involve patents. The issuer of this document is not responsible for identifying these patents.
This section is proposed by China Electrical Equipment Industry Association.
This section is under the jurisdiction of the National Insulator Standardization Technical Committee (SAC/TC80).
This section was drafted. China Electric Power Research Institute, Tsinghua University, Xi'an High Voltage Apparatus Research Institute Co., Ltd., State Grid Electric Power Section
Research Institute, China Southern Power Grid Scientific Research Institute Co., Ltd., Chongqing University, North China Electric Power University (Baoding), Tsinghua University Shenzhen Postgraduate
Institute, State Grid Corporation of China, China Southern Power Grid Co., Ltd., State Grid Shandong Electric Power Company Electric Power Research Institute, Yunnan Power Grid Co., Ltd.
Ren Electric Power Research Institute, State Grid Liaoning Provincial Electric Power Co., Ltd. Electric Power Research Institute, State Grid Anhui Provincial Electric Power Company Power Science Research
Institute, State Grid Fujian Electric Power Co., Ltd. Electric Power Research Institute, State Grid Jibei Power Co., Ltd. Maintenance Branch, State Grid Beijing Economic Technology
Research Institute, State Grid Jiangxi Provincial Power Company, State Grid Zhejiang Provincial Power Company, State Grid Hubei Provincial Power Company, State Grid Hunan Provincial Power Company, State Grid
Electric Power Research Institute of Jiangsu Electric Power Company, Electric Power Research Institute of Guangdong Power Grid Co., Ltd., State Grid Corporation Operation Branch,
Nanjing Electric (Group) Co., Ltd., Sichuan Yibin Global Group Co., Ltd., NGK Tangshan Electric Porcelain Co., Ltd., Dalian Electric Porcelain Set
Group Co., Ltd., Suzhou Electric Porcelain Factory Co., Ltd., Zibo Taiguang Power Equipment Factory, Jiangsu Shenma Power Co., Ltd.
The main drafters of this section. Zhou Jun, Huang Ruiping, Su Zhiyi, Wu Guangya, Wang Jian, Liang Xidong, Yao Junrui, Yang Yingjian, Wei Peng, Fan Lingmeng,
Jiang Xingliang, Luo Bing, Wang Liming, Zhang Fuzeng, Yu Xinzhe, Liu Yan, Shen Qinghe, Ma Yi, Yang Tiejun, Cheng Dengfeng, Huang Haiyi, Jia Zhidong, Liu Yaxin,
Li Jin, Liu Yunpeng, Liu Bo, Guo Zhifeng, Jiang Wendong, Ma Jianguo, Gong Zhenxiong, Zhou Zhicheng, Peng Xiangyang, Shaan Huaping, Fan Jianer, Tian Liang, Zeng Hong,
Dong Gang, Lu Zhou, Zhang Jijun, Teng Guoli, Zhou Shuchen.
High voltage insulators used in dirty conditions
Selection and sizing
Part 4. Insulators for DC systems
1 Scope
This part of GB/T 26218 specifies the principles for the selection and size determination of high-voltage insulators used in DC systems under contaminated conditions,
Material, site pollution level determination, external insulation configuration, insulator outline parameter requirements, design verification.
This section applies to.
● porcelain and glass insulators;
● Composite insulator;
● Hybrid insulators.
This section includes three aspects of the classification of pollution levels, the configuration of pollution external insulation and the requirements of umbrella parameters.The main contents are as follows.
● Fouling characteristics and site pollution;
● Insulator selection and external insulation configuration under different pollution levels (including the number of line insulators and the insulation length of station insulators)
And creepage distance);
● Requirements for insulator umbrella parameters.
This section does not cover insulator selection and size determination under special operating conditions such as ice, snow and heavy rain.
2 Normative references
The following documents are essential for the application of this document. For dated references, only the dated version applies to this article
Pieces. For undated references, the latest version (including all amendments) applies to this document.
GB/T 2900.8 Insulators for electrical terms
GB/T 19077-2016 particle size analysis laser diffraction method
GB/T 22707-2008 Artificial pollution test for high-voltage insulators for DC systems
GB/T 24622-2009 Guidelines for measuring the wettability of insulator surfaces
GB/T 26218.1-2010 Selection and sizing of high-voltage insulators used in contaminated conditions. Part 1. Definitions and information
And general principles
GB/T 26218.2-2010 Selection and sizing of high-voltage insulators used in contaminated conditions. Part 2. For AC systems
Porcelain and glass insulators
GB/T 26218.3-2011 Selection and sizing of high-voltage insulators used in contaminated conditions. Part 3. For AC systems
Composite insulator
DL/T 859-2015 Artificial pollution test for composite insulators for high-voltage AC systems
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