基于S变换及同步相量测量的输电线路故障定位研究

文中提出一种基于S变换及相量测量装置(Phasor Measurement Units,PMU)的输电线路故障定位方法,将双端电压数据经过S变换预处理后,分离出故障波段与正常波段及其电压幅值相位数据,将两组数据之差经相模转换后作为初始数据源,输入故障定位特征函数中,最后通过粒子群优化算法(Particle Swarm Optimization,PSO)的全局搜索能力求解出定位目标函数的最优解以确定故障位置。仿真实验结果显示,文中方法能够实现故障的准确定位,并能提供更为丰富、可视化程度更高的故障信息。

Research on Fault Location of Transmission Line Based on S-Transform and Synchronized Phasor Measurement

A fault location method for transmission line based on S-transform and phasor measurement units(PMU)is proposed in this paper.The double-terminal voltage data is pretreated by S-transform in order to separate fault waveform from the normal one.And voltage amplitude phase data is calculated at the same time.Moreover,two sets of data are subtracted and the difference is used as the initial data source after phase-to-mode conversion and is input into the fault location characteristic function.Finally,the optimal solution of the function is obtained by particle swarm optimization(PSO)though the ability of global searching to determine the fault location.In conclusion,the simulation results show that the proposed method can accurately locate faults and provide more abundant and visualized fault information.