A Multi source Cooperative Control Strategy for Standalone Microgrids Based on Bus Frequency Signaling

To achieve long term and stable operation of standalone microgrid, the multi source coordinated control strategy based on bus frequency signal and self decision model of the standalone microgrid are put forward in this paper. As to the proposed coordinated control strategy, according to the bus frequency signal algorithm, the frequency threshold is set up by considering the state of charge of the energy storage system, which is used as the switch signal of control mode in the micro turbine. The energy storage system operate according to the state of charge of the energy storage system, which can guarantee sufficient energy for energy storage system, and realizes cooperative control between the active storage system and the back up micro turbine independent of communication. Through the verification on MATLAB/SIMULINK simulation platform, it can be seen that coordinated control strategy has good effects, and can maintain the stable operation of the standalone microgrid.