Study on Power Quality Control in Multiple Renewable Energy Hybrid MicroGrid System

Compounding the various kinds of power sources would impact the quality of power supply within the MicroGrid and cause many control problems to be dealt with. This paper focuses on the stability of MicroGrid operation and discusses the control techniques of combining micro turbine and Fuel cell, Hydrogen tank, and Electrolyzer system hybrid System (FHES) to expand the MicroGrid system´s ability for solving power quality issue of frequency fluctuation. The paper examines the feasibility of FHES control, especially dynamic control of electrolyzer system, to secure real power balance and enhance the operation capability of handling frequency fluctuation. It is presented that the Proposed PC control and monitoring system can be considered as a means of power quality control to improve the frequency fluctuation caused by a random power fluctuation on generation and load sides and to relax a tie line power flow fluctuation by the frequency one on the interconnected MicroGrid local power system.