Impact and Improvement Method of the Biological Effects during the Transmission Tower Being Lightning Struck

2017 2nd Asia Conference on Power and Electrical Engineering

能源学;电工学

Li, Hengzhen^1 ; Mo, Youguang^1 ; Sun, Guanghui^1 ; Wang, Pengcheng^2 ; Xu, Han^2 ; He, Zhijie^2

Guangdong Power Grid Limited Liability Company, Foshan Power Supply Bureau, Foshan

528000, China^1

School of Electric Engineering, Southwest Jiaotong University, Chengdu

610031, China^2

关键词: Bioelectromagnetism;    Biological effects;    Grounding conductors;    Improvement methods;    Lightning currents;    Local current density;    Transmission line towers;    Transmission tower;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/199/1/012109/pdf
DOI  :  10.1088/1757-899X/199/1/012109

来源: IOP

【 摘 要 】

When lightning strikes the transmission line towers, the lightning current flow through the overhead line shunted along the grounding conductor dispersed in the earth, the lightning current amplitude of tens of thousands of amperes or even hundreds of thousands of amperes, making the local current density is very large, seriously affecting the surrounding biological safety. This paper analyzes that different fish fatalities in fish ponds after lightning strikes the transmission line towers, the typical accident towers were simulated and the correctness of the model was verified by CDEGS. Meanwhile the effects of lightning current on fish were simulated, according to the simulation results that the fish current density is related to body length and the current angle in the electric field. By comparing the simulated results with the fish tolerance limits, we can quantitatively evaluate the fish bioelectromagnetism of the relationship between soil resistivity and fishpond distance. The modification of the external grounding network based on the insulated lead wire can be used to guide the related grounding devices.