基于双树复小波的煤矿电网故障选线

从煤矿电网实际条件着手,针对三相电流互感器、两相电流互感器、单相电流互感器以及零序电流互感器4种情况分别展开讨论,分析各线各相电流初始行波,利用双树复小波分解得到模极大值幅值和相位关系,并进行比值计算,构成不同的选线或选相判据。Matlab仿真验证了基于双树复小波的煤矿电网故障选线方法的可靠性。

Fault line selection of coal mine power grid based on dual-tree complex wavelet

The paper proceeded from actual conditions of coal mine power grid,discussed in allusion to four cases of three-phase TA,two-phase TA,single-phase TA and zero-sequence TA.It analyzed initial travelling waves for each line of each phase current,used dual-tree complex wavelet decomposition to get relationships between amplitude and phase of modulus maxima,and then conducted ratio calculations to constitute different criterions of fault line selection or phase selection.Finally,Matlab simulation verifies reliability of fault line selection method of coal mine power grid based on dual-tree complex wavelet.