Recognizing Noise-Influenced Power Quality Events With Integrated Feature Extraction and Neuro-Fuzzy Network

The wavelet transform coefficients (WTCs) contain plenty of information needed for transient signal identification of power quality (PQ) events. However, once the power signals under investigation are corrupted by noises, the performance of the wavelet transform (WT) on detecting and recognizing PQ...

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Bibliographic Details
Published in:IEEE transactions on power delivery 2009-10, Vol.24 (4), p.2132-2141
Main Authors: LIAO, Chiung-Chou, YANG, Hong-Tzer
Format: Article
Language:English
Subjects:
Applied sciences
Degradation
Disturbances. Regulation. Protection
Electrical engineering. Electrical power engineering
Electrical power engineering
Event detection
Exact sciences and technology
Feature extraction
Fuzzy
Fuzzy logic
Fuzzy neural networks
Fuzzy systems
Miscellaneous
Neural networks
neuro-Fuzzy network
Noise
Noise reduction
noise-suppression
Operation. Load control. Reliability
Power electronics, power supplies
Power networks and lines
Power quality
Power system transients
Recognition
Riding
Signal processing
wavelet transform
Wavelet transforms
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Summary:The wavelet transform coefficients (WTCs) contain plenty of information needed for transient signal identification of power quality (PQ) events. However, once the power signals under investigation are corrupted by noises, the performance of the wavelet transform (WT) on detecting and recognizing PQ events would be greatly degraded. At the mean time, adopting the WTCs directly has the drawbacks of taking a longer time and much memory for the recognition system. To solve the problem of noises riding on power signals and to effectively reduce the number of features representing power transient signals, a noise-suppression scheme of noise-riding signals and an energy spectrum of the WTCs in different scales calculated by the Parseval's theorem are presented in this paper. The neuro-fuzzy classification system is then used for fuzzy rule construction and signal recognition. The success rates of recognizing PQ events from noise-riding signals have proven to be feasible in power system applications.
ISSN:0885-8977
1937-4208
DOI:10.1109/TPWRD.2009.2016789