CAJ | 학술논문

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 kV.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.
위보장저압배전선로검수작업안전,유필요연구저압배선재정운검수상태하적감응전압화전류.채용 EMTP 건모방진,분별계산료상해지구 4 개초/특고압교、직류수전공정선로하방평행가설적380 V저압배선상적감응전압、전류,대영향감응적인소진행료분석,병설계연발료저압배전선로감응전압소제장치.방진결과표명,초/특고압교、직류선로재기하방정운적380 V배선상산생교대적감응전압화전류,감응전압최고가체30～70 kV.시험결과표명,저압배선감응전압소제장치재선로정운시장기량단접지,능유효소제배전선로상적감응전압.
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 kV to 70 kV. 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.