Abstract
Occurring attacks in communication links of interconnected alternating current (AC) microgrids (MGs) is inevitable and interrupts the grid operation. If they are not tolerated, the stability of the overall AC MG may ruin. This paper deals with a robust (mixed) μ-synthesis-based controller to regulate the frequency in an AC MG system with vehicle-to-grid (V2G) technology. In the developed control method, the system uncertainties and external disturbance inputs are considered and the robust controller is designed offline based on a numerical method. The AC MG involves a load, a wind turbine, a photovoltaic cell, a gas turbine, a diesel generator, and a battery. The designed controller manipulates the diesel generator to mitigate the destructive effects of load, wind turbine, and photovoltaic cell power variations. By using the Pade approximation technique, the control input time delay is augmented to the state-space representation. Numerical comparisons are given to illustrate the superiority of the proposed control method.
Published Version
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