【摘要】 提出了一种利用暂态高频分量实现振荡中故障选相的方案。该方案利用电流互感器传变过来的暂态高频电流,用B样条导数小波提取暂态信号,先对其进行相关性分析,然后利用模糊集理论将相关系数模糊化,最后进行综合评判,选出故障相。该方案不受过渡电阻和系统运行方式的影响。通过动模实验和Matlab仿真,取得了理想的效果。更多还原

【Abstract】 This paper presents a new approach for fault selection during power swing using transient signals.This approach uses the transient current transformed from current transformer,B spline derived wavelet is proposed to extract the high frequency signals and correction analysis is applied to the results,then the correction is disposed by fuzzy set,finally the fault phase is given.This approach is insensitive to fault resistance and operational modes.The effectiveness and reliability of presented methods are verified by the result of dynamic simulation and MATLAB calculation.更多还原