Fault Line Selection Based on Wavelet Packet Transform and Support Vector Machine
[1]Gao Jinfeng,Qin Yurui,Yin Hongde.Fault Line Selection Based on Wavelet Packet Transform and Support Vector Machine[J].Journal of Zhengzhou University (Engineering Science),2020,41(01):63-69.[doi:10.13705/j.issn.1671-6833.2020.01.003]
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Journal of Zhengzhou University (Engineering Science)[ISSN
1671-6833/CN
41-1339/T] Volume:
41
Number of periods:
2020 01
Page number:
63-69
Column:
Public date:
2020-03-10
- Title:
- Fault Line Selection Based on Wavelet Packet Transform and Support Vector Machine
- Keywords:
- fault line selection; wavelet packet transform; multi-classification; support vector machine
- CLC:
- -
- Abstract:
- When single-phase grounding fault occurs in distribution network, the non-power frequency components of zero-sequence current between fault line and sound line are obviously different. In order to solve the problem that the success rate of line selection is not high when the modulus maxima polarity is used as criterion in high resistance grounding, a method of line selection based on zero sequence current non-power frequency component and support vector machine is presented in this paper. This method decomposes the zero sequence current of each line by wavelet packet transform, chooses the characteristic frequency band according to the principle of maximum energy, takes the energy and modulus maxima of different lines in the characteristic frequency band as the characteristic vector, takes the fault line label as the classification target, transforms the fault line selection int o multi-classification, and uses support vector machine to predict the fault line. A large number of training samples are obtained through simulation. K-fold cross-validation and grid search are used to optimize the param eters of support vector machine. The results on the test dataset show that the method is accurate and reliable. The correct line selection can be achieved at different grounding distances, grounding resistances and initial phase angles of faults.
- References:
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- Similar References:
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Last Update:
2020-02-22