采用一种具有双参数控制的结构实现并网运行和负序电流的消除,直流侧的电压控制环作为并网的基础控制,同时提取电网电压和逆变器输出电压的负序分量并加以控制,当两者相等时就可以达到消除负序电流的目的,然后对负序电压的获取以及电流的跟踪控制作了分析.最后利用Matlab/Simulink 对系统进行仿真,验证了系统的可行性.%In this paper, a control method with two-parameter structure to achieve grid-connected operation and eliminate the negative sequence component of grid-connected current. DC voltage control loop is the foundation for the grid control, at the same time, the negative sequence components of inverter output voltage and grid voltage are extracted, it can achieve the purpose to eliminate the negative sequence current when control the two components equal. Then the acquisition of negative sequence voltage and current tracking are also discussed. Finally, the system is simulated with Matlab/Simulink, and then the simulation results validate the feasibility of the system.
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