交流特高压对平行架设线路挂接临时地线上的电磁感应分析

平行交流特高压带电线路架线施工中,线路感应电情况十分复杂和严重,线路升空后主要经由杆塔临时接地线接地,施工中挂接地线过少会出现接地线熔断现象.基于电磁暂态分析软件建立了同塔双回交流带电线路以及平行架设的昌吉—古泉±1 100 kV直流施工线路的模型,计算了施工线路多处接地线上的感应电压和感应电流,总结了不同接地方案下感...

Electromagnetic induction analysis of AC high voltage on parallel line erected temporary ground line

In the construction work of parallel AC UHV live lines,the line induction is very complicated and serious.After the line is lifted,it is mainly grounded through the temporary grounding wire of the tower.If the number of grounding wires is too small during construction,the grounding wire will be blown.Based on the electromagnetic transient analysis software,this paper establishes the model of the double-circuit AC live line on the same tower and the Changji-Guquan±1100 kV DC construction line set up in parallel,and calculates the induced voltage and induced current on multiple grounding lines of the construction line.The distribution characteristics of induced voltage and current under different grounding schemes are analyzed,and the factors affecting the induced voltage and current are analyzed.The effectiveness of multiple grounding lines on the construction line was verified by field tests.The research results provide a theoretical basis for parallel UHV AC transmission line safety and grounding scheme of construction line.