中华人民共和国住房和城乡建设部公告

前言

1　总则

2　术语

3　系统中性点接地方式和电气装置绝缘上作用的电压

• 3.1　系统中性点接地方式

• 3.2　电气装置绝缘上作用的电压

4　暂时过电压、操作过电压及限制

• 4.1　暂时过电压及限制

• 4.2　操作过电压及限制

• 4.3　VFTO及限制

• 4.4　限制操作过电压用MOA的基本要求

5　雷电过电压及保护

• 5.1　一般规定

• 5.2　避雷针和避雷线的保护范围

• 5.3　高压架空输电线路的雷电过电压保护

• 5.4　发电厂和变电站的雷电过电压保护

• 5.5　配电系统的雷电过电压保护

• 5.6　旋转电机的雷电过电压保护

6　绝缘配合

• 6.1　绝缘配合原则

• 6.2　架空输电线路的绝缘配合

• 6.3　变电站绝缘子串及空气间隙的绝缘配合

• 6.4　变电站电气设备的绝缘配合

附录A　外绝缘放电电压的海拔校正

附录B　架空线路悬垂绝缘子串风偏角计算用风压不均匀系数

附录C　操作过电压下线路绝缘闪络率的计算方法

• C.1　按线路操作过电压预测幅值分布进行计算

• C.2　简化统计法

附录D　架空线路和变电站雷电性能的分析计算方法

• D.1　架空线路雷电性能的分析

• D.2　变电站的雷电性能计算方法

附录E　电气设备承受一定幅值和时间暂时过电压的要求

附录F　超高压架空线路和变电站空气间隙的放电电压数据

本规范用词说明

引用标准名录

1 General provisions

2 Terms

3 System neutral point treatment and voltage stresses on insulation of AC electrical installations

• 3.1 System neutral point treatment

• 3.2 Voltage stresses on insulation of AC electrical installations

4 Temporary overvoltage，switching overvoltage and mitigation

• 4.1 Temporary overvoltage and mitigation

• 4.2 Switching overvoltage and mitigation

• 4.3 VFTO and mitigation

• 4.4 Basic requirement of MOA to suppress switching overvoltage

5 Lightning overvoltage and protection

• 5.1 General requirements

• 5.2 Protected volume of lightning rods or shield wires

• 5.3 Lightning overvoltage protection of overhead transmission lines

• 5.4 Lightning overvoltage protection of power plant and substations

• 5.5 Lightning overvoltage protection of distribution systems

• 5.6 Lightning overvoltage protection of rotating electric machines

6 Insulation coordination

• 6.1 Principles of insulation coordination

• 6.2 Insulation coordination of overhead transmission lines

• 6.3 Insulation coordination of insulator string and clearances in substations

• 6.4 Insulation coordination of electrical equipment in substations

Appendix A Atmospheric correction of discharge voltage for external insulation

Appendix B Uneven factor of wind speed for calculation on angle of wind deflection of suspension insulator string on overhead lines

Appendix C Calculation methods of insulation flashover rate for switching overvoltage

Appendix D Estimation methods of lightning performance of overhead lines and substations

Appendix E Requirements on duration of temporary overvoltage for electrical equipment

Appendix F Flashover voltage test results for clearances of extra high voltage overhead lines and substations

Explanation of wording in this code

List of quoted standards