机械制造企业配电网故障检测研究

由于故障电流小、电弧不稳定、受电磁干扰大、信噪比低等原因，配电网故障检测可靠性较低。利用小波变换提取零序电压和零序电流暂态特征频带（SFB）信息，在SFB频带内，故障馈线暂态零序电流方向与健全馈线相反，据此采用暂态瞬时无功功率方向及暂态无功功率进行故障选线。大量的MATLAB仿真验证表明：该选线方法能够准确识别单相接地故障方向线路，可靠性和灵敏性较高。

Research on the Distribution Network Failure Detection for Machine Manufacturing Enterprises

Detection of distribution network failure is not satisfactory in practice due to the nature of weak fault current,unstable electric arc,strong electromagnetism induction and low SNR.This article utilizes wavelet transform to pick up the transient frequency band of zero sequence voltage and current;the opposite direction of transient current about faulty feeder and healthy feeder in SFB.Therefore,selected fault feeder is adopted with the direction transient reactive power algorithm.The simulation and analysi...