Coordinated Control Strategy of Multiple Operation Condition for DC Microgrid with Time-Of-Use Price

In the development of distributed generation and microgrid technology, microgrid as a new type of distributed generation system has been widely concerned. In order to ensure the stable operation of the microgrid, firstly, the paper proposes a coordinated control strategy of multiple operation conditions for DC microgrid taking time-of-use into account. Through the mutual coordination of port parameters and control instructions between the local control layer and the central management layer, the power balance in the microgrid is maintained. Combined with time-of-use, 13 kinds of energy coordination operation conditions taking into account the peak, valley and normal time of the electricity price are divided. Through “peak-valley arbitrage” operation condition to reduce operating costs, and to a certain extent to ease the grid in the peak of the pressure. Secondly, a grid-connected pre-synchronization control method is proposed to achieve smooth switching under multiple operation conditions, so as to improve the stability of microgrid operation. Finally, the effectiveness of the proposed coordinated control strategy of multiple operation condition for DC microgrid with time-of-use price is verified by simulation.