同杆并架双回线准确参数未知时的故障测距新算法

New Fault Location Algorithm for Double Transmission Lines on a Same Tower

比较分析了各种主要的测距算法,并在此基础上提出了一种同杆并架双回线的故障测距新算法。算法采用分布参数线路模型,利用了双端数据和六序分量法,并考虑了对不准确线路参数识别的问题。EMTP仿真表明了该算法的正确性和有效性,测距精度较高,不受故障过渡阻抗、负荷电流和系统运行方式的影响,不需要双端数据同步,对不准确的线路参数具有较好的自适应能力。该算法具有工程实用价值。

This paper compares and analyses various types of main fault location algorithms and puts forward a new fault location algorithm for double transmission lines on a same tower. The algorithm adopts the line's model of distributing parameter, uses two-end data and six-order component and considers the problem to identifying inaccurate parameter. EMTP simulation demonstrates the correctness and validity of the proposed algorithm. The precision of location identified by the proposed algorithm is quite high and the algorithm is not affected by transition fault impedance, load current and method of system operation. It does not demand two-end data in synchronism and has preferable self-adapting ability for inaccurate line parameter.