基于线路分段参数的非全程同塔双回线故障定位算法

对非全程同塔双回输电线路故障定位问题进行研究。首先,对非全程同塔双回线的特点进行分析,并针对传统伪根识别法无法适用于非全程同塔双回线故障定位的问题,在分析伪根存在与否的基础上,提出一种换模量伪根识别算法,该算法可以有效识别故障支路与非故障支路的伪根情况。进而,提出一种基于非全程同塔双回线路分段参数的双端工频量故障定位算法,该算法将故障支路辨识与故障点定位相结合,在线路全程内均可完成故障定位,不受故障类型、各端数据不同步和过渡电阻等因素影响。ATP-EMTP仿真结果表明,所提算法可行、有效。

Fault Location Algorithm for Incomplete Double-Circuit Transmission Lines Based on Line Segment Parameters

The aspects of fault location for incomplete double-circuit transmission lines have been studied in this paper. Firstly, the characteristics of the incomplete lines are analyzed. Since the traditional pseudo root identification method cannot be applied in fault location for incomplete lines, a new pseudo root identification algorithm is presented based on analyzing the existence of pseudo root. This algorithm can effectively identify pseudo roots of both fault branch and non-fault branch. Then, a fault location algorithm for incomplete double-circuit lines based on line segment parameters is proposed. The method combines fault location with fault branch identification, which can be realized within the entire line. The algorithm is featured by each terminal data without synchronization, and immune to the types of fault, fault resistance and other factors. The simulation results have verified the proposed algorithm.