海洋环境下接地电阻的测量

Measurement of Grounding Resistance in Marine Environment

对电力系统中接地电阻的精确测量,能够保证电力设备正常运行。为实现对海洋环境下跨海大桥所属电气设备的接地电阻的准确测量,对跨海大桥所属的电气设备接地的可靠性进行判断。传统的方法需要在土壤中打入辅助电极,不适用于海洋环境。在海洋环境中,通过"三点法"使用钳型接地电阻测试仪对跨海大桥所属电气设备的接地电阻进行测量,数据结果显示"三点法"能够准确反映接地电阻的大小。在港珠澳大桥施工现场,通过"三点法"使用钳型接地电阻测试仪,准确测量了各接地系统的接地电阻。

The accurate measurement of ground resistance in power system can ensure the normal operation of power equipment. In order to realize accurate measurement of grounding resistance of electrical equipment of sea-crossing bridge under marine environment,the grounding reliability of the electrical equipment belonging to the bridge is determined. Traditional method needs to infiltrate the auxiliary electrode into the soil,which is not suitable for marine environment. In marine environment,the grounding resistance of the electric equipment of the cross-sea bridge is measured by clamp type grounding resistance tester with "three point method". The data result shows that the "three-point method"can accurately reflect the amount of the grounding resistance.In the construction site of Hong Kong-Zhuhai-Macao Bridge,the grounding resistance of each grounding system is measured accurately by using the abovementioned grounding tester with "three-point method".