多时滞广域测量电力系统稳定分析与协调控制器设计

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Abstract The model of power system with multiple time delays is constructed for wide area measurement information with different transmission distances. The damping controller signals are divided into two parts: The first level of control is derived from local signals without time delays. The second level of control is supplied by a coordinator using global states with different multiple time delays. The delay fractioning based on Lyapunov-Krasovskii approach is used to derive a delay-dependent steady stability criterion, and the criteria of stability are formulated as feasibility problems of linear matrix inequality(LMI). The model is reduced by the model reduction method. The time-delay output feedback control is realized for wide-area power system. Meanwhile, the maximum delay times is calculated. In addition, the relationship between the delay fractioning of the criteria and the damping controller is discussed. Finally, taking a two-area four-machine power system as an example, the results of simulation in time-domain show that performance of the proposed controller in this paper is effective.

Key words： Power system wide-area measurement system(WAMS) multiple time delays output feedback controller linear matrix inequality(LMI) delay fractioning

Received: 31 May 2012 Published: 18 June 2014

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TM712

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2014/V29/I2/279

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