基于主从控制的逆变器并联系统研究

基于主从控制的逆变器并联系统由3个采用输出电压瞬时值和滤波电感电流瞬时值双闭环反馈控制的逆变器模块构成,通过共用电压调节器实现负载均分,理论分析证明并联系统的输出阻抗减小,输出电压精度提高,电路仿真结果表明逆变器输出滤波电容和逆变器的电流环放大倍数是影响负载均分的主要因素,实验结果表明该并联方案可行,并联系该具 较好的均流精度,电气性能指标优于单逆变模块。

Research on master-slave controlled inverter parallel system

The master slave controlled inverter parallel system is composed of three inverter modules. Based on the instantaneous output voltage and filter inductor current double closed loop feedback control and through sharing the same voltage regulator, the current sharing is achieved. Theory analysis proves that the output impedance of parallel system is reduced and the precision of output voltage is improved. Simulation results show that the main factors which influence the current sharing are output filter capacitor and the amplifying multiple of current loop. Experimental results confirm the feasibility of this parallel scheme and show that the parallel system has good current sharing performance, being superior to single module.