基于双端不同步采样的同杆双回线故障测距算法

Two-terminal Asynchronous Data Based Fault Location Algorithm for Double-circuit Transmission Lines on One Pole

在现有各种测距算法的基础上,采用基于同杆双回线分布参数模型和相模变换技术,将同杆双回线解耦成完全独立的模量并选择合适的模量,采用牛顿-拉夫逊法实现同杆双回线双端不同步采样的故障定位。仿真结果证明,该算法不需要判断故障类型,且不受系统运行方式、过渡电阻、负荷电流的影响,具有较高的故障测距精度。

Based on existing different fault location algorithms, the paper puts forward a fault location algorithm for double transmission lines on one pole. The algorithm adopts the line＇s model of distributing parameter and phase-modal transformation technique, uses two-end data and six-order component, and realizes fault location of two-terminal non-synchronous sampling for the double transmission lines on one pole by Newton-Raphson approach. The simulation demonstrates that the precision of the presented algorithm is high and the algorithm is not affected by system operation mode, transition resistance and load current.