摘要
为保障低压配电线路检修作业安全,有必要研究低压配线在停运检修状态下的感应电压和电流。采用EMTP建模仿真,分别计算了上海地区4个超/特高压交、直流输电工程线路下方平行架设的380 V低压配线上的感应电压、电流,对影响感应的因素进行了分析,并设计研发了低压配电线路感应电压消除装置。仿真结果表明,超/特高压交、直流线路在其下方停运的380 V配线上产生较大的感应电压和电流,感应电压最高可达30~70 k V。试验结果表明,低压配线感应电压消除装置在线路停运时将其两端接地,能有效消除配电线路上的感应电压。
In order to guarantee personnel safety during maintenance of low-voltage distribution lines, it’s necessary to evaluate induced voltage and current on the lines under maintenance. EMTP models are adopted to calculate the induced voltage and current on 380 V distribution lines parallel to and beneath four extra high voltage（EHV）/ultra high voltage（UHV） AC and DC transmission lines in Shanghai area, respectively. The factors impacting on induced voltage and current are analyzed. Simulation results show that large voltage and current are induced on 380 V distribution lines and maximum induced voltage varies from 30 k V to 70 k V. A new device is developed for eliminating induced voltage on such low-voltage distribution lines. Experimental results show that the device can be used to ground both ends of the distribution line under maintenance and eliminate induced voltage effectively.
出处
《电网技术》
EI
CSCD
北大核心
2015年第9期2640-2646,共7页
Power System Technology
基金
国网上海市电力公司项目(SHSHJX00ZSJS1401135)的资助
关键词
超/特高压交、直流输电线路
低压配电线路
平行架设
感应电压
感应电流
感应电压消除装置
EHV/UHV AC and DC transmission lines
low-voltage distribution lines
parallel erection
induced voltage
induced current
induced voltage eliminating device
