光储微电网并网模式协调控制策略

摘要

为了有效抑制光伏输出的随机性、间歇性对大电网所产生的不利影响,提高光伏并网的友好性,深入研究了光伏-储能微电网系统在并网运行模式下的协调控制框架及相应的控制策略.通过对光伏-储能微电网系统中的功率变换器的恒功率控制和直流母线电压无静差跟踪控制策略进行协调、整合,在确保光伏-储能微电网系统向大电网提供所需的有功和无功功率的同时,有效维持了微电网系统的稳定运行.通过Matlab/Simulink平台开展了仿真研究,仿真结果验证了各控制策略的有效性.%For an effective suppression of negative effects caused by the random and intermit nature of photovoltaic (PV)generations on the grid and to make the PV systems more grid-friendly,coordinated control frameworks and the corresponding control strategies for micro-grid system with PV and energy storage units in grid connected operation are studied. Constant power control and DC bus zero-error tracking control strategies are incorporated,so that the control strategies can ensure that the micro-grid system can supply specified active and reactive powers to the grid,and main-tain a stable operation of the micro-grid system. A simulation is carried out on the Matlab/Simulink platform,and simu-lation results show the validity of each coordinated control strategy.