Neutral Grounding Fault Line Selection Algorithms for Low Voltage Side of Distribution Transformers in Civil Buildings

Abstract

The neutral grounding fault line selection of low-voltage side of distribution transformer in civil buildings is of great significance in the field of power system. It is necessary to analyze the grounding fault of distribution transformer in civil buildings, calculate the current energy of distribution transformer by using the frequency coefficient of wavelet packet decomposition, and analyze the current fault components of grounding fault phase and sound phase, get the energy ratio of grounding fault current component, and complete the grounding fault of distribution transformer. Experiments show that the proposed algorithm can reasonably judge the fault line of distribution transformer nodes, and has a high accuracy in the selection of grounding faults.