架空线-高压电缆混合线路故障测距改进算法

为了提高架空线-高压电缆混合线路故障测距的精度,并解决测距的伪根问题,提出了一种混合线路的双端不同步数据故障测距改进算法。基于分布参数混合线路模型,分析了测距中伪根的产生原因,通过对二分搜寻法改进来避开伪根,通过改进算法测出故障位置,并将测距结果与自动重合闸技术配合,从而提高了电力系统的安全可靠性。Matlab仿真结果表明,该测距算法不受伪根、过渡电阻、故障类型和位置以及不同步采样角等条件的影响,能够快速、精确地实现故障测距。

Improved algorithm of fault location on overhead power line and high voltage cable hybrid line

In order to improve the accuracy of fault location on overhead power line and high voltage cable hybrid,and solve the problem of pseudo roots,an improved algorithm of fault location on hybrid line by two-terminal asynchronous information was proposed.Based on distributed parameter hybrid line model,the cause of pseudo roots in the fault location was analyzed,binary search to avoid pseudo roots was improved,the improved algorithm was used to locate fault,and the results and auto-reclosing technology were cooperated.Accordingly,the safety and reliability of the power system were improved.Matlab simulation results show that the fault location algorithm does not be affected of pseudo roots,transition resistance,fault type,fault position and asynchronous angle,and it shows that the fault location algorithm is fast and accurate.