采用改进不完全S变换估计电能质量扰动参数

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Abstract This paper proposes a new method of parameter estimation of power quality disturbances based on modified incomplete S-transform, which combines the modified S-transform with incomplete S-transform. The method complementary advantages in time frequency resolutions and computation speed. First, the computational procedure is provided. After that the optimal windowing coefficients in connection with different disturbances are discussed. Then the extraction of characteristic quantities is introduced, which are the module vectors obtained from the modified incomplete S-transform. The computation of each vector based on adaptive selection of optimal windowing coefficient. Finally, the parameters estimation method which utilizes these characteristic quantities are illustrated. Simulation results verified that the proposed method has characteristics of lower complexity, less computation and high precision.

Key words： Power quality modified incomplete S-transform computational procedure adaptive disturbance parameters

Received: 16 January 2010 Published: 07 March 2014

PACS:

TM933.4

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	Li Li
	Yi Jiliang
	Zhu Jianlin

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Li Li,Yi Jiliang,Zhu Jianlin. Parameter Estimation of Power Quality Disturbances Using Modified Incomplete S-Transform[J]. Transactions of China Electrotechnical Society, 2011, 26(6): 187-193.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2011/V26/I6/187

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