Multi-objective design of damping controllers of FACTS devices via mixed H2/H∞ with regional pole placement

Mixed performance control problems have been the objective of much attention lately. These problems allow for capturing different performance specifications without resorting to approximations. In this paper, a mixed H(2)/H(infinity) with regional pole placement is used to design controllers for SVC, SSSC and UPFC placed in a small power system to secure system operation against inter-area modes. This multi-objective design allows for more flexible and accurate specification of the desirable closed-loop behaviour, both in the time and frequency domains. The results of the proposed multi-objective approach are compared with pure H(infinity) method (mixed-sensitivity), which show the effectiveness of this approach. (C) 2003 Elsevier Science Ltd. All rights reserved.

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