CAJ | 학술논문

局部放电(PD)检测和定位对电力电缆绝缘状态监测具有十分重要的意义，有必要建立一个精确的电缆模型对局部放电电磁脉冲的传播特性进行分析。考虑到电缆结构的复杂性，难以得到高精度的等效电路模型，因此采用数值电磁方法，通过构建良好的电缆模型，在时域中分析电缆及其中间接头的局部放电电磁波的传播特性，并对其传播特性进行仿真，计算局部放电源沿不同方向传播产生的电场，将计算得到的电缆中的PD信号波形与接头模型中的信号波形进行对比。结果表明，局部放电产生的电磁波在电缆和电缆中间接头中的传播规律存在很大差异，因此，在电缆局部放电检测与定位时要考虑电缆中间接头的影响。
국부방전(PD)검측화정위대전력전람절연상태감측구유십분중요적의의，유필요건립일개정학적전람모형대국부방전전자맥충적전파특성진행분석。고필도전람결구적복잡성，난이득도고정도적등효전로모형，인차채용수치전자방법，통과구건량호적전람모형，재시역중분석전람급기중간접두적국부방전전자파적전파특성，병대기전파특성진행방진，계산국부방전원연불동방향전파산생적전장，장계산득도적전람중적PD신호파형여접두모형중적신호파형진행대비。결과표명，국부방전산생적전자파재전람화전람중간접두중적전파규률존재흔대차이，인차，재전람국부방전검측여정위시요고필전람중간접두적영향。
Partial discharge (PD) detection and location is of great significance for the power cable insulation condition monitoring, so an adequate cable model is needed to build to analyze the PD electromagnetic pulse propagation characteristics. Considering the complex structure of the cable and high accurate equivalent circuit model is hard to obtain, we applied numerical electromagnetic method. The propagation characteristics of PD electromagnetic wave of cables and joints in time domain were analyzed through building good cable model, and the propagation characteristics were simulated. The electric field produced by the PD source propagating along different directions was calculated, and the calculated PD waveforms in the cable are compared with those in the cable joint model. The results show that the propagation characteristics of PD electromagnetic wave in the cable and joint have big difference. Therefore, the PD detection and location for cables need to consider the effects of cable joints.