Abstract
A novel fuzzy logic controller based on T-S model is proposed for automatic generation control (AGC) system after deregulation. In this paper, the traditional AGC is modified to take into account the effect of the nonlinearity and bilateral contracts on the dynamics, since the restructured AGC system is now exposed to sudden, larger changes and the bilateral contracts are concerned. The generation rate constraint (GRC) is firstly constructed in T-S model to design the fuzzy logic controller, while the valve position limits on the governor are under consideration as well. The concept of DISCO participation matrix (DPM) is introduced to simulate the bilateral contracts. Sufficient conditions for the asymptotic convergence of the whole system are provided in terms of linear matrix inequalities (LMI). The current control scheme is compared with conventional proportional and integral (PI) controller in case 1, which indicates the proposed controller has better performance than the other while nonlinearity is concerned. The effect of bilateral contracts is simulated in case 2.
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