Ground Fault Diagnosis Method of Three-Phase Power Supply Line Based on Improved Wavelet Packet Analysis
The grounding fault signal of three-phase power supply lines is complex and susceptible to interference,which reduces the sensitivity of fault diagnosis.Therefore,a fault diagnosis method of three-phase power supply line based on improved wavelet packet analysis is proposed.By deploying high-precision sensors,analog-to-digital conversion,wireless transmission and normalization measures,the quality of grounding signals is improved.By optimizing frequency band division,integrating fast Fourier transform and interval sampling techniques,the characteristics of grounding fault signals are extracted.The fault diagnosis model is established,supplemented by Euclidean distance similarity matching,intelligent automatic diagnosis of grounding faults is achieved.The experimental results show that the design method can improve the sensitivity of diagnosis and ensure fast and accurate identification of faults in complex power environments.
improve wavelet packet analysisthree-phase power supplygrounding faultextract fault signal featuresautomatic diagnosis
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