A Novel Hybrid Fuzzy PD-TID Controller for Load Frequency Control of a Standalone Microgrid

摘要

Uncertainties related to the power output from the renewable energy sources and low inertia of a standalone microgrid(SMG) demand a robust control strategy for continuous frequency control of the SMG. Consequently, this paper proposes anovel hybrid fuzzy proportional derivative–tilt integral derivative (FPD-TID) controller for the load frequency control (LFC)analysis of a SMG. Inspiration for the proposed controller comes from combining the advantages of both the FPD and the TIDcontrollers. Gains of the proposed controller are optimized using a robust chaotic crow search algorithm (CCSA). In orderto validate the proposed control scheme, comparative frequency deviation responses of the SMG are presented consideringmultiple disturbances. Also, the proposed controller is put to test for its sensitivity and robustness subject to a±30% variationin the SMGparameters and disconnection of various SMG subsystems, respectively. Since operational stability of the SMGishighly desirable under such circumstances, the proposed control scheme aims to achieve a trade-off between its performanceand the operational stability of the SMG. The operational stability of the SMG is established through eigenvalue and rootlocus analysis.