电缆网故障选线方法的研究

对电缆网故障选线方法的研究一直是配电网故障研究的重点.笔者提出一种基于小波分析的暂态群体比幅比相法为主、暂态能量法为辅的故障选线法,并运用EMTP数字仿真工具搭建了一个10 kV电缆网配电系统模型,进行了仿真实验.仿真结果证明该法能够准确地识别故障发生时刻.不受电压故障时刻、接地电阻大小等因素对故障选线的影响,抗干扰能...

A New Fault Line Selection Method for Cable Network

Research of cable network fault line selection method has been the focus in the fault study of distribution system.Based on the wavelet analysis,we proposed a new fault line selection method by employing the comparison method of transient population amplitudes and phases with supplementation of the transient energy method,established a 10 kV cable network distribution system model by adopting EMTP digital simulation tools,and performed a simulation experiment.Simulation results show that the present method can accurately catch the fault moment without the influences of such factors as voltage fault time and grounding resistance on selection of fault line.Its anti-interference ability and recognition rate of the fault lines are improved,and the fault feature information is obvious in the simulation graphics.The main criteria and the supplementary criterion for fault line selection can fuse very well.Hence,the accuracy of fault line selection is improved significantly.