配电网单相接地故障的综合选线方法及其实现

Comprehensive fault line selection method and its realization for single phase earth fault in distribution networks

为克服单一的接地选线方法无法满足小电流接地系统的各种情况,从而不能做到100%正确选线的缺陷,提高选线装置的正确动作率,该文提出了一种综合的选线方案,它以4种较有代表性且经实践证明较为有效的选线方法为基础,采用模糊逻辑形成综合选线判据。给出了硬件实现的方案,进行了M atlab仿真,仿真结果表明该方法能够有效地提高选线的正确率。

Any individual fault line selection criterion can not select the faulty feeder correctly and completely during all conditions at present. A comprehensive fault line selection method is proposed in this paper in order to improve the correct rate of fault line selection criterion and perfect the performance of line selecting equipment. Fuzzy logic, based on four effective methods, is adopted to form com- prehensive fault line selection criterion. MATLAB simulation gives satisfactory result that the comprehensive method can improve the correct rate of fault line selection. In the end, hardware design plan is described to develop fault line selection equipment.