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| Wide Area Power System Damping Controller Considering Time-Delay |
| Luo Ke1, 2, Liu Yutian1, Ye Hua1 |
| 1. Shandong University Jinan 250061 China; 2. Shandong Jianzhu University Jinan 250101 China |
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Abstract With respect to negative effects on system dynamic performance induced by time-delay of wide-area measurements, a direct iterative design approach for power system wide-area supplementary inter-area damping controller is proposed. A matrix inequality theorem based on state feedback as a asymptotic stability criterion on time-delay system is deduced from a known linear matrix inequality (LMI) theorem. The non-linear matrix inequality in the theorem is transformed into linear matrix inequality by variable substitution method. Then the damping controller design is converted to a cone complementarity problem subjecting to linear matrix inequalities and solved by iteration. The approach can directly obtain state feedback control matrix and has good convergence. Simulation results of a test system show that the wide-area damping controller is insensitive to time-delay to some degree and can damp inter-area low frequency oscillation very well.
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Received: 31 August 2009
Published: 04 March 2014
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2010, Vol. 25 
