高压输电线路行波故障选相及测距研究

Study on fault phase selection and fault location of traveling wave in transmission line

针对电力系统高压输电线路上故障相别和故障点测距问题,提出一种行波故障选相及单端测距分析法。通过提取输电线路在发生故障时暂态过程包含的大量故障特征信息,利用凯伦贝尔变换方法将三相电压、电流进行相模转换。根据不同短路故障下α,β,0模分量之间的关系进行故障选相和输电线路故障点的定位。最后通过建立的双源电力系统短路故障仿真模型数据分析结果验证了所提方法的有效性。

In connection with the problem of fault phasing and fault location on high voltage transmission lines in power system,this paper proposes a traveling wave fault phase selection and single-ended location analysis method.By extracting a large amount of fault feature information contained in the transient process of the transmission line when a fault occurs,the three-phase voltage and current are converted into phase-mode using the Karen Bell transform method.According to the relationship betweenα,βand 0 mode components under different short-circuit faults,the fault phase selection and the location of the fault point of the transmission line are carried out.Finally,the effectiveness of the proposed method is verified by the data analysis results of the established dual-source power system short-circuit fault simulation model.