交流型微网指定次电压谐波主动补偿策略

Autonomous Selective Voltage Harmonics Compensation Control Method in an AC Microgird

微电网中电力电子变换器,以及局部非线性负荷的普遍存在,使得谐波污染已经成为影响微电网电能质量的重要因素。根据分布式电源接口逆变器,提出了一种基于两相静止αβ坐标系的微电网孤岛运行下的电压谐波补偿控制策略,有效地降低了微电网电压谐波畸变率。考虑到分布式电源的有功输出,采用了指定次谐波补偿控制策略,节省分布式电源用于补偿的功率,实现了微电网电能质量柔性控制;最后,在MATLAB/SIMULINK中对所提控制策略进行了验证。

The existence of many electrical converters and partial non-liner loads in AC micro-grid makes the harmonic pollution an important factor of influencing the power quality.This paper proposes a voltage harmonic compensation control method based on two-phase stationary frame,which depends on the distributed generation inverter tied to micro-grids,and the method can efficiently reduce the voltage THD of the microgird. Considering the distributed generations' active power output,this paper adopts the selective harmonics compensation control strategy which helps to save the DG capacity and achieve the flexible power quality control. Finally,in the MATLAB/SIMULINK,the proposed control strategy is verified in this paper.