Abstract

In this paper, a new self-adaptive droop control strategy based on Micro-grid Energy Storage System is presented. Through the tracking control of delayed power, the reference droop coefficient in the control strategy is adjusted and corrected, thus changing the P-F and Q-V droop characteristic curves. This control strategy allows the energy storage system to track the power balance of the grid-side in real time and whereby the system can stabilize the voltage and frequency when the load changes, which can leave out the communication devices installed on the energy storage system and the micro-grid central controller. In addition, the feasibility of the control strategy is verified by Matlab / Simulink simulation platform.

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