基于在线辨识和区域极点配置法的电力系统低频振荡协调阻尼控制

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Abstract Based on the uniform damping thought and the identification of the low-frequency oscillation (LFO), the paper puts forward the design method of damping controllers which makes use of region pole assignment method to realize coordination damping control of LFO. First, the damping characteristics of power systems oscillation and the characteristics that machines are involved in oscillations are analyzed, and the condition and method of realizing uniform damping control are put forward. Then evaluating the damping based on the oscillation characteristics identification, the control object of uniform damping is determined. And reduced order models used to design controllers are deduced by the order reduction of identification models. Finally controllers’ parameters are calculated by poles assignment method which damp several oscillation modes that generator participated in. Because identified models consider fluencies of other machines and the control goal avoids decreasing damping of other modes in excess, the coordination of controllers is realized. At the same time, the feedback signal of controller is local and the decentralized coordinated control is realized. At last, take New England 10-machine 39-node system as example, the simulation proves controllers designed validity and robust, the method put forward a new thought for restraining LFO.

Key words： Low-frequency oscillations on-line identification uniform damping region poles assignment decentralized control

Received: 28 April 2011 Published: 20 March 2014

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TM712

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	Ma Yanfeng
	Zhao Shuqiang

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Ma Yanfeng,Zhao Shuqiang. Coordinated Damping Control of Power Systems Low-Frequency Oscillation Based on On-Line Identification and Region Poles Assignment[J]. Transactions of China Electrotechnical Society, 2012, 27(9): 117-123.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2012/V27/I9/117

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