CAJ | 학술논문

为解决配电网小电流接地故障时故障点定位困难的问题，提出一种基于线电压和零模电流暂态分量的故障定位新方法。该方法借助馈线自动化（feeder automation，FA）系统实现，不需要额外增加设备。馈线终端检测线电压和零模电流信号，利用暂态线电压的希尔伯特变换与暂态零模电流的乘积计算故障方向参数，FA主站根据故障点前后方向参数极性相反的特征确定故障点所在的线路区段。介绍基于线电压的小电流接地故障检测和接地故障相确定的算法。数字仿真与试验结果表明该方法是正确可行的。
위해결배전망소전류접지고장시고장점정위곤난적문제，제출일충기우선전압화령모전류잠태분량적고장정위신방법。해방법차조궤선자동화（feeder automation，FA）계통실현，불수요액외증가설비。궤선종단검측선전압화령모전류신호，이용잠태선전압적희이백특변환여잠태령모전류적승적계산고장방향삼수，FA주참근거고장점전후방향삼수겁성상반적특정학정고장점소재적선로구단。개소기우선전압적소전류접지고장검측화접지고장상학정적산법。수자방진여시험결과표명해방법시정학가행적。
In order to solve the fault location problem of single phase grounding fault in non-solidly earthed distribution network, a new fault location method based on transient component of line voltage and zero-mode current was presented. This method is realized by the feeder automation （FA） system and does not require additional equipment. The product of transient line voltage after Hilbert transformation and transient zero-mode current is defined as the parameter of fault direction, calculated by the feeder terminal unit （FTU）. The fault section is located by master station according to opposite polarity of direction parameter before and after fault point. The algorithm of detecting single phase grounding fault and confirming the fault phase was introduced. Results of digital simulation and experiment demonstrated the accuracy and feasibility of this method.