ZHOU Tingdong, SHANG Hai, HE Yongtao, et al. Fault Diagnosis for Distribution Networks Based on Transfer Learning and Residual Network[J]. High Voltage Apparatus, 2026, 62(4): 208-214.
DOI:
ZHOU Tingdong, SHANG Hai, HE Yongtao, et al. Fault Diagnosis for Distribution Networks Based on Transfer Learning and Residual Network[J]. High Voltage Apparatus, 2026, 62(4): 208-214. DOI: 10.13296/j.1001-1609.hva.2026.04.024.
Fault Diagnosis for Distribution Networks Based on Transfer Learning and Residual Network
The single-phase grounding faults in the distribution network account for a relatively high proportion
and there are various types of faults. If different types of grounding faults are handled appropriately
both reliability and availability of the distribution network can be effectively improved. However
how to quickly distinguish different types of faults has always been a research hotspot. In this study
an innovative solution is proposed to solve the problem of high resistance grounding fault detection difficulties caused by the unobvious characteristics of high resistance grounding fault current and voltage
that is
the high resistance grounding fault is identified by using transfer learning and deep residual network. First
the zero-sequence voltage data in 2 cycles after the single-phase ground fault is extracted
and the zero-sequence voltage is mapped into the two-dimensional time-frequency map. Then
a deep residual network is built
the small sample migration is achieved by freezing underlying parameters
and different fault samples is classified by fine-tuning parameters.To verify the effectiveness of the algorithm
a 10 kV distribution network simulation model is set up. It is proved by experiment that application of this method can effectively detect arc high resistance grounding fault signals and accurately identify such grounding faults.
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