基于模糊粗糙集理论的小电流接地故障选线融合技术研究

正确的接地故障选线是小电流接地系统存在的一大难题．通常采用的单一故障选线方法只对部分故障信息进行处理，因此选线的可靠性不高。基于这种状况，利用信息融合技术，并以基于暂态的信号增强的小波包故障选线法和基于稳态的群体基波比幅比相法、5次谐波比幅比相法、有功法四种接地故障选线方法为例进行了模糊综合评判实例仿真。PSCAD仿真结果说明针对多种选线方法进行模糊信息融合能够充分发挥其各自优势，相互补充，扩大正确选线的范围。

System with Insulated Neutral Point Earthing of Fault Line Detection Fusion Technology Study Based on Fuzzy and Rough Set Theory

To correct detecting earthing fault line is hard to achieve on the system with insulated neutral point.The usual used fault line detection method works only on part of fault data and lacks credibility.In this paper,a multi-criteria fault line detection method is presented by using information fusion technology from example results of four earthing fault line detection methods.A fuzzy comprehensive evaluation is given.PSCAD simulation results show the proposed method of fuzzy data fusion from multiple line d...