微电网在并网和孤岛两种运行模式切换过程中,需要改变控制结构,容易造成电压和电流突变,影响系统稳定运行。为此,提出了一种微电网并/离网统一控制策略,将分布式电源(distributed generator,DG)控制为电流控制电压源(current controlled voltage source,CCVS),同时适用于并网、孤岛两种模式,模式切换过程中无需孤岛检测和控制策略切换,能较好地解决微电网无缝切换问题,并且保证并网时DG恒功率输出,孤岛运行时频率、电压稳定,负荷功率均分。仿真结果验证了该控制策略的有效性。
【英文摘要】
In the process of operation mode switching between grid-connection and island operation of the micro-grid,it requires to change controlled structures,which may cause voltage and current mutation and affect stable operation of the system.Therefore,this paper presents a kind of unified control strategy for grid-connection and island operation mode of the micro-grid which is to make distributed generation(DG)work as current controlled voltage source(CCVS).This control strategy is applicable to both grid-connec...
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