摘要
调查了1 000 kV皖电东送特高压输电线路邻近线路分布情况,提出了邻近线路在特高压线路上产生感应电压的计算方法,分析了土壤电阻率及平行接近距离对交流线路产生感应电压的影响规律,仿真计算得到了邻近线路在特高压线路上产生的感应电压值,并与现场测试结果进行了对比分析。结果表明:皖电东送特高压同塔双回交流输电线路跨越、平行于多条?800、?500 kV直流及500 kV交流线路;特高压线路上的容性感应电压和感性感应电压均随着平行接近距离的增加而减小;容性感应电压的减小速率较快,感性感应电压的减小速率相对缓慢。土壤电阻率的变化对特高压线路上的容性感应电压几乎没有影响;而感性感应电压值随着土壤电阻率的增加而增大。皖电东送特高压线路上感应电压具有"静电感应电压较高,电磁感应电压相对较低"的特点。
Distribution of the transmission lines neighboring 1000 kV Anhui-to-East ultra high voltage （UHV） power transmission lines were surveyed. Calculation method of the voltage on UHV line induced by the adjacent transmission lines was put forward. The influence law of soil resistivity and parallelly approaching distance on the induced voltage occurring on AC lines were analyzed. The voltage of UHV line induced by the adjacent transmission lines was obtained through numerical simulation, and compared with the field test results. Results show that, many ±800 kV,±500 kV DC and 500 kV AC transmission lines across from or are in parallel with Anhui-to-East UHV AC power transmission lines. Both capacitive induced voltage and inductive induced voltage of UHV transmission lines decrease with the increase of parallelly approaching distance, and the capacitive induction voltage decrease faster than the inductive induced voltage. The variation of soil resistivity has little effect on the capacitive induced voltage of UHV AC line, and the inductive induced voltage increases with the increase of soil resistivity. Field test results showed that the induced voltage of UHV AC line has characteristics of great electrostatic induced voltage and comparatively little electromagnetic induced voltage.
出处
《电网技术》
EI
CSCD
北大核心
2014年第5期1162-1168,共7页
Power System Technology
基金
国家电网公司科技项目(SGJLJSFW[2013]494)~~
关键词
皖电东送
特高压
同塔双回
工频参数
测试干扰
感应电压
Anhui-to-East power transmission
ultra high voltage
double-circuit line on same tower
power frequency parameter
measurement interference
induced voltage
