Journal
IEEE TRANSACTIONS ON POWER SYSTEMS
Volume 32, Issue 4, Pages 2509-2520Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TPWRS.2016.2617886
Keywords
Adaptive control; inter-area oscillation; Kalman filter; linear matrix inequality (LMI); mean chi-square variable; phasor measurement unit (PMU); polytopic convexity
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Funding
- National Natural Science Foundation of China [51407071]
- Fundamental Research Funds for the Central Universities [2016MS12]
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An adaptive control scheme based on the convexity property of polytopes for damping interarea oscillations is developed here. A polytopic control guarantees requisite damping when the current operating point lies inside it. Multiple polytopes increase the robustness of the control provided the polytope inside which the operating point lies after a disturbance is correctly identified. In this paper, the identification of the correct polytope is performed using Kalman-filters and the mean-chi square variable. A 29-machine 127-busmodel of theWestern Electricity Coordinating Council (WECC) system is used as the test system for this analysis. The simulation results demonstrate that the proposed adaptive control is able to provide adequate damping to the interarea modes of oscillation under changing operating conditions without any prior knowledge of the postdisturbance operating state. It is also found to be more robust than some of the modern controllers proposed previously.
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