In the case of small current grounding system, the fault current is too small to select the fault feeder. In order to solve this problem, this paper proposes a method based on Ensemble Empirical Mode Decom-position (EEMD) for fault feeder selection of distribution lines. Firstly, the zero-sequence current of all feeders is decomposed by the ensemble empirical mode decom-position, then the kurtosis calculation is performed on the decomposed Intrinsic Mode Function (IMF), and the transient high-frequency components are adaptively selected and the transient high-frequency energy is calculated. Defining fault credibility based on transient high frequency energy. Finally, the fault credibility of all feeders is compared, and the fault feeder selection result is given. The simulation results of PSCAD show that the method has high precision and is not affected by factors such as transition resistance, fault distance and initial fault angle.
Keywords distribution network, small current grounding system, fault feeder selection, transient energy, eemd