Type 2 fuzzy logic–based robust control strategy for power sharingrnin microgrids with uncertainties in operating conditions

摘要

Accurate power sharing in a microgrid with distributed generations is a challengingrntask because of various uncertainties in the network operating conditions. Thisrnarticle proposes a new control scheme for power sharing in a microgrid comprisingrndoubly fed induction generator–based wind energy system, a photovoltaic system,rnand a battery storage, operating in both grid‐connected and islanding conditions.rnA robust intelligent controller is designed for power sharing to counter the effectsrnof nonlinearities in the model and uncertainties in the operating conditions. The thirdrndimension of type 2 membership functions (MFs) and the footprint of uncertaintyrntogether provide an additional degree of freedom in the controller design thatrnenables it to directly model and handle the uncertainties associated with the rulesrnand MFs. The performance of the proposed scheme is verified through a comparativernanalysis with the conventional Proportional Integral (PI) controller, consideringrnthe IEEE‐34 bus system as a microgrid, under various network disturbances. Further,rnthe feasibility of the controller for real‐time applications is demonstratedrnthrough hardware‐in‐loop simulations in the real‐time digital simulator environment.