同步发电机的非线性鲁棒电压控制

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Abstract Most nonlinear excitation control methods depend on the operating point of power system and can’t assure voltage regulation accuracy of synchronous generators. For this reason, a nonlinear robust voltage control strategy is proposed in this paper. For a synchronous generator connected to power network through a transformer, the mathematical model is transformed into a uncertain linear system with the state variables of deviations of generator terminal voltage, rotor speed and generator active power output. And then a nonlinear voltage controller is designed utilizing a linear matrix inequation(LMI) based robust control theory. Compared with the existing controllers, the proposed controller assures voltage regulation accuracy and adapts to system parameters and operating points. And the controller doesn’t need to be respectively designed for single-machine-infinite-bus system and multi-machine power system. Besides that, neither rotor angle nor any variable’s differentiation or integration needs to be measured for the controller. Detailed tests were conducted by PSCAD/EMTDC for a single-machine-infinite-bus system and WSCC 4-machine power system respectively, and simulation results illustrate good performance of the proposed controller.

Key words： Power system synchronous generators nonlinear excitation control voltage control output feedback

Received: 30 May 2011 Published: 20 March 2014

PACS:	TM341
	TM712

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	Ruan Yang
	Yuan Rongxiang
	Wan Li
	Zhao Hongsheng

Cite this article:

Ruan Yang,Yuan Rongxiang,Wan Li等. Nonlinear Robust Voltage Control for Synchronous Generators[J]. Transactions of China Electrotechnical Society, 2012, 27(9): 9-16.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2012/V27/I9/9

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