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

This is an open access article published by the IET under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0/)
Received 08/11/2018, Accepted 10/01/2019, Published 15/03/2019

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.

Inspec keywords: frequency control; distributed power generation; decentralised control; power grids; velocity control; frequency response; reactive power control; power system control

Other keywords: conventional droop control; DC-MG; distributed energy resources; DC microgrids; active power sharing; energy storage; grid frequency support; Matlab-Simulink simulations; GB enhanced frequency response service; decentralised control strategy; photovoltaic generation

Subjects: Control system analysis and synthesis methods; Distributed power generation; Multivariable control systems; Power and energy control; Velocity, acceleration and rotation control; Power system control; Frequency control; Control of electric power systems

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