An Islanded Microgrid Droop Control using Henry Gas Solubility Optimization

Abstract

Coordination of various distributed generation (DG)\nunits is required to meet the growing demand for electricity.\nSeveral control strategies have been developed to operate\nparallel-connected inverters for microgrid load sharing. Among\nthese techniques, due to the lack of essential communication links\nbetween parallel-connected inverters to coordinate the DG units\nwithin a microgrid, the droop control method has been generally\naccepted in the scientific community. This paper discusses the\nmicrogrid droop controller during islanding using the Henry Gas\nSolubility Optimization (HGSO). The most important goals of\ndroop control in the islanded mode of operation are the frequency\nand voltage control of microgrid and proper power sharing\nbetween distributed generations. The droop controller has been\ndesigned using HGSO to optimally choose PI gains and droop\ncontrol coefficients in order to obtain a better microgrid output\nresponse during islanding. Simulation results indicate that the\ndroop controller using HGSO improves the efficiency of\nmicro-grid power by ensuring that variance in microgrid\nfrequency and voltage regulation and effective power sharing\noccurs whenever micro-grid island mode or when variation in\nload occurs.