HHT based on the LS-SVM and its application in the voltage flicker and harmonic detection of microgrid

Microgrid contains many distributed resources (DR), such as photovoltaic, wind power, and these DR which have the characteristics of random, volatility and intermittent, will cause voltage fluctuation and flicker, therefore, harmonic pollution will be produced from power electronic devices in DR. Hi...

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Bibliographic Details
Published in2011 4th International Conference on Electric Utility Deregulation and Restructuring and Power Technologies (DRPT) pp. 1722 - 1726
Main Authors Peng Li, Liqiang Fei, Peng Xi, Jinxing Jie, Jianmin Zhang
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.07.2011
Subjects
harmonic
Harmonic analysis
HHT
LS-SVM
microgrid
Power harmonic filters
Support vector machines
Transforms
voltage flicker
Voltage fluctuations
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Summary:Microgrid contains many distributed resources (DR), such as photovoltaic, wind power, and these DR which have the characteristics of random, volatility and intermittent, will cause voltage fluctuation and flicker, therefore, harmonic pollution will be produced from power electronic devices in DR. Hilbert-Huang Transform (HHT) can distill these disturbing signals automatically and time-frequency spectrum can be obtained. However, in the application of this method there are serious end effects that mixed mode phenomenon will appear, affecting the detecting results. In order to suppress the end effects, a novel HHT based on Least Squares Support Vector Machine (LS-SVM) is applied to analyze voltage flicker and harmonic in microgrid. The results show that the improved HHT method is effective to control the end effects and the time, frequency and amplitude of disturbing signal will be detected quickly and effectively.
ISBN:9781457703645
1457703645
DOI:10.1109/DRPT.2011.5994175