Stability and Stabilization for T-S Fuzzy LoadFrequency Control Power System With Energy Storage System
IEEE TRANSACTIONS ON FUZZY SYSTEMS(2024)
摘要
This article investigates the stability and stabilization problem for delay-dependent Takagi-Sugeno (T-S) fuzzy load-frequency control (LFC) power system with energy storage system (ESS). First, a unified T-S fuzzy LFC model is constructed for power system with ESS by further analyzing the nonlinear characteristics existing in turbine and governor dynamics. Second, a fuzzy proportional-integral control strategy is proposed to stabilize the T-S fuzzy power system. Then, based on existing approaches to handle quadratic function with respect to the time-varying delay, an improved quadratic function negative-determination lemma is proposed to achieve larger upper bound of time delay. Furthermore, delay-dependent stability criteria with less conservatism are established by means of Lyapunov stability theorem. Finally, some contrast illustrative examples are given to verify the advantage of the proposed methods.
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关键词
Power system stability,Stability criteria,Valves,Power system dynamics,Turbines,Load modeling,Delays,Delay-dependent power system,improved quadratic function lemma,load-frequency control (LFC),Takagi-Sugeno (T-S) fuzzy control,time-varying delays
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