Distribution network fault location based on ESMD-EE and Duffing vibrator system

Aiming at the problem of difficult fault location under single-phase high-resistance ground fault in a distribution network, a fault location method based on optimized pole symmetric modal decomposition (ESMD-EE) with Duffing oscillator system is proposed. The primary noise reduction of the fault zero-sequence current signal is performed by using the pole symmetric mode decomposition method (ESMD), and the secondary noise reduction is completed by selecting the most prominent mode function of the fault characteristics through the pole entropy (EE); the line is selected according to the phase trajectory distinction of the Duffing oscillator system, and the traveling wave method is used to realize the accurate location. The simulation results show that the proposed method can achieve a 15km distribution line length meter-level fault location in the high-resistance grounding background, and the location accuracy rate exceeds 98% under different fault conditions.