Inverter main loop topology and hard ware/ soft ware design of main control circuit based on 500 kW parallel grid-connected PV inverter with the background of practical work are proposed . Meanwhile, a prototype of 500 kW parallel three-phase photovoltaic grid-connected inverter is made. Finally, the validity and feasibility of this design is confirmed by field experiment and the following computer simulation experimental.%以500 kW三相光伏并网逆变器的研究工作为背景,介绍了系统主回路的拓扑结构,主控制电路的硬件和软件设计,并实际制作了一台初样机.最后通过现场试验以及后续计算机仿真实验,验证了该设计方案的正确性和可行性.
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