基于改进型恒压控制与直流电压控制的交流微网协调控制方法研究

RESEARCH ON COORDINATED CONTROL METHOD OF AC MICRO-GRID BASED ON IMPROVED CONSTANT VOLTAGE CONTROL AND DC VOLTAGE CONTROL

PQ控制、下垂控制与交流微网中光伏发电、风力发电等微电源之间存在协调性差问题,该文通过采用交流微网的直流电压控制策略,可使直流电压控制与光伏发电、风力发电之间的配合与协调更好,但当采用直流电压控制时,光伏发电、风力发电微电源的恒压控制策略就无法实现,为此改进恒压控制策略,提出基于改进型恒压控制与直流电压控制的交流微网的协调控制策略。Matlab/Simulink仿真结果验证了该文所提控制策略的有效性和可行性。

Aiming at the problem of poor coordination between PQ control/droop control and micro-sources such as photovoltaic generation,wind power coordination in AC micro-grid,this paper uses DC voltage control strategy of AC microgrid with to obtain better cooperation and coordination between DC voltage control and photovoltaic generation,wind power in AC micro-grid. But when DC voltage control is used,the constant voltage control strategy of micro-sources cannot be achieved. For improving the constant voltage control strategy,a coordinated control strategy based on the improved constant voltage control and DC voltage control is proposed. The Matlab/Simulink simulation results show that the proposed control method is effective and feasible.