土壤电阻率对特高压输电线路塔顶电位的影响.pdfVIP

Smart Grid 智能电网, 2014, 4, 201-206 Published Online October 2014 in Hans. /journal/sg /10.12677/sg.2014.45029 Influence of Soil Resistivity on the Potential of Tower Overhead in UHV Transmission Line 1 2 1 2 Jiangang Gong , Zhouyou Lin , Yangyong Xu , Shen Zhao 1 State Grid Zhejiang Electric Power Company, Hangzhou 2 Wenzhou Power Supply Company of State Grid Zhejiang Electric Power Company, Wenzhou Email: th th th Received: Aug. 29 , 2014; revised: Sep. 28 , 2014; accepted: Oct. 8 , 2014 Copyright © 2014 by authors and Hans Publishers Inc. This work is licensed under the Creative Commons Attribution International License (CC BY). /licenses/by/4.0/ Abstract This paper established the equivalent model of the inductance effect and the spark effect of the grounding connector when attacked by lightning current. Meanwhile, the article explored the lightning simulation calculation model of the ultra-high voltage transmission lines, and analyzed the influence between the resistance rate and the tower potential when hit by lightning. The result indicates that: when the resistance rate of the soil is less, the tower potential increases greatly with the increase of the resistance rate; and when the resistance rate of the soil is bigger, it in- creases gently. So it is necessary to design the lightning protection based on the resistance rate of the soil. Keywords Spark Discharge, Impulse Grounding Resistance, Soil Resistivity, UHV, Tower Overhead Potential, Lightning Protection