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Dynamic events analysis of Thailand and Malaysia power systems by discrete wavelet decomposition and short term fourier transform based on GPS synchronized phasor data
Author(s)
Issarachai, Ngamroo
Date Issued
May 21, 2013
Type
Article
Abstract
This paper applies the discrete wavelet decomposition and short term Fourier transformation to analyze the dynamic events in Thailand and Malaysia power networks using a synchronized phasor data obtained from, the wide area monitoring system. The phasor data which are synchronized by global positioning system, are measured from, the 220 V wall outlets. Here, the dynamic analysis of two events is carried out. For the first event, a sudden 80 MW load transferring from Thailand to Malaysia systems through a weak 115 kV tie-line is considered. Second, the tripping of High-Voltage Direct Current link between Thailand and Malaysia due to the fault in a thyristor room at the converter station of Thailand side is analyzed. Both events cause a problem of frequency oscillation in a southern area of Thailand. Besides, they severely excite the inter-area oscillation in a 230 kV tie-line between central and southern areas of Thailand. Analyzed results based on discrete wavelet decomposition and short term Fourier transform provide valuable information of the system dynamic behavior in both frequency and time domains. © 2013 ICIC Internatinal.
Citation
International Journal of Innovative Computing Information and Control, 9(5), 2203-2228, 2013