基于CEEMD和TEO的电力电缆故障测距方法研究

针对传统希尔伯特黄变换(HHT)中经验模态分解(EMD)在分解过程中存在模态混叠现象,将补充总体平均模态分解(CEEMD)与Teager能量算子相结合.提出一种基于CEEMD和TEO的电力电缆故障行波测距方法,通过CEEMD分解得到故障行波信号的固有模态分量(IMF),采用Teager能量算子得到瞬时能量谱,得到故障初始行波到达检测点时刻.PSCAD/EMTDC仿真结果验证了该方法的正确性,测距精度高.

A Power Cable Fault Location Method Based on CEEMD and TEO

In order to avoid the phenomenon of mode mixing in the decomposition process of the empirical mode decomposition (EMD) in the traditional Hilbert Huang transform (HHT),the complementary ensemble EMD (CEEMD) is combined with the Teager energy operator.A new traveling wave fault location method based on CEEMD and Teager energy operator is proposed.The intrinsic mode function (IMF) of fault traveling wave signal is extracted by CEEMD.Then,the instantaneous energy spectrum is extracted by the Teager energy operator.The initial traveling wave reaches the detection point.The PSCAD/EMTDC simulation results demonstrate the correctness and high precision of the proposed methodology.