Abstract: Aiming to solve the problem of possible CEEMDAN fault location failure caused by noise residual and modal spurious problems in wind farm station side traveling wave detection, a new method of current traveling wave fault location based on ICEEMDAN and NTEO is proposed. The ICEEMDAN algorithm that can efficiently mitigate modal aliasing is employed to decompose the current traveling wave signal into intrinsic mode components and residual components. Subsequently, the NTEO algorithm is utilized to perform denoising on the decomposed first-order high-frequency signal, thereby enhancing the fault mutation characteristics of the traveling wave. According to the instantaneous energy peak characteristics, the first arrival time of the traveling wave head is accurately calibrated to achieve fast and reliable fault location. Simulation results show that while both CEEMDAN-NTEO and CEEMDAN-NTEO can accurately calibrate the fault traveling wave head, ICEEMDAN-NTEO traveling wave fault location method has better robustness.

Key words: wind farm, transmission line, ICEEMDAN-NTEO, fault location