Design of a predictive control strategy for integration of stand-alone wind/diesel system

Power control of variable speed wind turbines coupled with squirrel cage induction generators is difficult and suffers from some fundamental problems. If this type of wind turbines are applied to remote areas, they cannot stabilize frequency and voltage of the grid in acceptable limits. Changes in the load during one day also make this problem harder to deal with. In this paper, a system consisting of three wind turbines integrated with two diesel generator connected to a variable load is analyzed, and a new predictive control is proposed. The load model is implemented a changing power demand based on load curve. This control method adjusts a controller based on past system and environmental data. Simulations with “PSCAD/EMTDC” software show the ability of the proposed control system to provide high quality power for this type of load.