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　高压电气装置接地

• 3.1　一般规定

• 3.2　保护接地的范围

4　发电厂和变电站的接地网

• 4.1　110kV及以上发电厂和变电站接地网设计的一般要求

• 4.2　接地电阻与均压要求

• 4.3　水平接地网的设计

• 4.4　具有气体绝缘金属封闭开关设备变电站的接地

• 4.5　雷电保护和防静电的接地

5　高压架空线路和电缆线路的接地

• 5.1　高压架空线路的接地

• 5.2　6kV～220kV电缆线路的接地

6　高压配电电气装置的接地

• 6.1　高压配电电气装置的接地电阻

• 6.2　高压配电电气装置的接地装置

7　低压系统接地型式、架空线路的接地、电气装置的接地电阻和保护总等电位联结系统

• 7.1　低压系统接地的型式

• 7.2　低压架空线路的接地、电气装置的接地电阻和保护总等电位联结系统

8　低压电气装置的接地装置和保护导体

• 8.1　接地装置

• 8.2　保护导体

• 8.3　保护联结导体

附录A　土壤中人工接地极工频接地电阻的计算

附录B　经发电厂和变电站接地网的入地故障电流及地电位升高的计算

附录C　表层衰减系数

附录D　均匀土壤中接地网接触电位差和跨步电位差的计算

附录E　高压电气装置接地导体（线）的热稳定校验

附录F　架空线路杆塔接地电阻的计算

附录G　系数k的求取方法

附录H　低压接地配置、保护导体和保护联结导体

附录J　土壤和水的电阻率参考值

本规范用词说明

引用标准名录

1 General provisions

2 Terms

3 Earthing of high voltage electrical installations

• 3.1 General

• 3.2 Protective earthing

4 Earthing grid of power plant and substation

• 4.1 General requirement on the design of earthing grid of 110 kV and above power plant and substation

• 4.2 Requirement on earthing resistance and potential equalizing

• 4.3 Design of horizontal earthing grid

• 4.4 Earthing design of substation with Gas Insulated Switchgear

• 4.5 Design of earthing system for lightning and ESD protection

5 Earthing of high voltage overhead transmission lines and cable lines

• 5.1 Earthing of high voltage over head transmission lines

• 5.2 Earthing of 6kV～220kV cablelines

6 Earthing of high voltage electrical installations in distribution network

• 6.1 Earthing resistance

• 6.2 Earthing devices

7 Earthing method types of low-voltage power network，earthing of overhead transmission line，earthing resistance and protective equipotential bonding system of electrical installations

• 7.1 Types of earthing method

• 7.2 Earthing of low voltage overhead line，earthing resistance and protective equipotential bonding system

8 Earthing devices and protective conductor of low voltage electrical installations

• 8.1 Earthing devices

• 8.2 Protective conductor

• 8.3 Protective bonding conductor

Appendix A Calculation method of power-frequency earthing resistance of artificial earthing electrode in soil

Appendix B Calculation method of short-circuit current and the consequent ground potential rise through earthing grid of power plant and substation into soil

Appendix C Determination of attenuation coefficient of surface soil layer

Appendix D Calculation method of touch potential difference and step potential difference

Appendix E Thermal stability check of earthing conductor of high voltage electrical installations

Appendix F Calculation method of earthing resistance of power transmission tower

Appendix G Calculation method of coefficient k

Appendix H Specification of the low voltage earthing device，protective conductor and protective bonding conductor

Appendix J Recommended resistivity values of earth and water

Explanation of wording in this code

List of quoted standards