【摘要】 逆变器并联运行时由于各模块输出电压的频率、相位等参数不一致,会在模块间产生环流。先分析了逆变器并联运行时环流产生的原理。然后对加入和未加入环流反馈控制的并联逆变器系统结构做出比较,结果表明加入环流反馈控制后,其输出电压不变,环流大大减少,两台逆变器的输出电流趋于一致。最后用Matlab软件对此并联系统进行了仿真研究,验证了控制方式的可行性。更多还原

【Abstract】 Inverter parallel operation will have a circle current between the modules,because the module’s output voltage frequency,phase,and other parameters are inconsistent.At first,this paper analyzes the principle of circle current between parallel inverters.Then it gives the comparison between the structure of inverter parallel system with circulation feedback control and the structure of inverter parallel system without circulation feedback control.The results indicate that with circulation feedback control,output voltage keeps invariant,circulating current is greatly reduced and output current of two inverters tends to coincide.At last,simulations study of parallel system with MATLAB software are done to prove its rationality.更多还原