A New Strategy for Mitigating The Frequency Deviation in Distribution networks and Microgrids

An islanded Microgrid (MG) might experience extreme frequency deviations which necessitates a reliable frequency control scheme to ensure its frequency stability. Various techniques have been proposed including PI control and more advanced techniques like fuzzy control. The PI controls cannot establish a fast frequency restoration due to their poor performance and slow response-time of DGs. Advanced methods have been able to slightly improve the DGs response-time and hence decrease the total frequency deviation. Here, a novel frequency control scheme is proposed that despite its simplicity than previous schemes is able to further decrease the total frequency deviation. The proposed is tested on the CIGRE low voltage MG. The simulation results show that using the proposed frequency control scheme, the value of the total absolute frequency deviation is decreased by 79% and 68 % than using the GA-optimized and fuzzy frequency schemes, respectively.