Recognizing noise-influenced power quality events with integrated feature extraction and neuro-fuzzy network

Chiung Chou Liao, Hong Tzer Yang

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)2132-2141
Number of pages10
JournalIEEE Transactions on Power Delivery
Volume24
Issue number4
DOIs
Publication statusPublished - 2009 Jul 31

All Science Journal Classification (ASJC) codes

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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