Investigation of a decentralised control strategy for grid frequency support from DC microgrids

DC microgrids (DC-MGs) are capable of integrating and coordinating distributed energy resources into power systems, along with providing services to the wider system, e.g. balancing, frequency support, demand response and so on. This study investigates the capability of DC-MGs providing grid frequency support, for the GB enhanced frequency response service. In this study, photovoltaic generation, energy storage, and load form the DC-MGs. The control strategy is a decentralised scheme, based on conventional droop control for active power sharing and grid frequency support. Droop control is also used within the DC-MG for power-sharing amongst generation and load. Scenarios are conducted to evaluate the effectiveness of the control strategy and verified by MATLAB/Simulink simulations.