Research and Application of Fault Location Method for Active Distribution Network Based on Wideband Polymorphic Signal Identification

In order to solve the problem of identification of wideband polymorphic signals and location of fault zones faced by large-scale application of power electronic devices in active distribution networks, this paper proposed a wideband polymorphic signal identification algorithm based on CEEMDAN-RobustICA-TFT. The parameter estimation accuracy of the proposed algorithm in the case of noise free and strong noise was obtained through simulation, and the measurement error was about 0.06%. On this basis, a fault section location method for active distribution network was proposed, and a numerical example was vanalyzed to verify the feasibility and accuracy of this method. The fault section location unit was further constructed and field application tests were carried out. The experimental results show that the fault section location method proposed in this paper can quickly and accurately detect the fault information, and can also accurately locate in the strong noise environment.