分支配电线路单相接地故障的多端测距方法

MultiTerminal Method for the Locating of Single PhaseGrounding Faults in Radial Distribution Network

针对分支配电线路特点，建立分布参数电路模型。提出了故障后分别在线路的起始端及所有末端施加正弦诊断信号，并检测激励所在端口的电压电流相量，以此实现故障分支的识别和接地点的定位。大量计算机仿真和在仿真线路上的实验表明，该方法有效。

A distributed parameter circuit model has been constructed according to the characteristics of the radial distribution network. A method is then presented that when a fault is reported, sinusoidal diagnose signals are applied to the starting point and one after another to all the measurable terminals of the circuit. Then by measuring the voltage and current at the excited terminal, the faulted branch can be identified and the grounding point can be located. Repeated computer simulation and experiments on simulated network show that the method is effective.