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Wide-area damping control reckoning with feedback signals’ multiple delays

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5 Author(s)
Shaobu Wang ; Dept. of Electr. Eng., Zhejiang Univ., Hangzhou ; Yonghui Yi ; Zhaoyan Liu ; Quanyuan Jiang
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WAMS (wide-area measurement systems) involve all kinds of communicating channels. Different channels have different time delays and randomicity of time-delay. So closed-loop power systems ought to be modeled as nonlinear dynamic systems with multiple time delays and varying time delays. A method is proposed in this paper to design a controller that can adapt to feedback signals with multiple time delays and varying time delays. The method is based on the topological characteristics of stable time-delay regions, the LMIs (linear matrix inequalities) method, GA (genetic algorithm) and the balanced truncation model-reduced algorithm. Numerical results form a tow-area four-machine power system demonstrate that the controller derived from the above method can damp low-frequency oscillations in the system for the feedback signals with multiple time delays and varying time delays.

Published in:

Power and Energy Society General Meeting - Conversion and Delivery of Electrical Energy in the 21st Century, 2008 IEEE

Date of Conference:

20-24 July 2008

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