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光伏并网逆变器的并联可以增加系统容量,但随之而来的环流会降低系统效率,增加并网电流畸变.传统PI控制器方法,由于零序电流控制方法响应速度慢,当两台逆变器电感量或输出电流不相等时,对环流抑制难以实现精准控制.提出预测控制PWM控制方案,可以准确实现两台逆变器并联时的环流抑制,基于数字信号处理器TMS320F2812PGFA的控制系统,快速有效的实现了预测控制的软件算法,实验结果验证了算法的有效性.“,”PV grid inverter in parallel can increase the system capacity, but the resulting circulation will reduce the efficiency of the system and increase the grid current distortion. The traditional PI controller method, because the zero sequence current control method is slow to respond, when the inductances or output currents of the two inverters are not equal, circulation restrain is difficult to achieve precise control. The predictive control PWM control scheme is proposed in this paper, which can accurately realize the circulating current inhibition of two inverters in parallel. The control system based on digital signal processor TMS320F2812PGFA implements the software algorithm of predictive control fast and efficiently, the experimental results verify the effectiveness of the algorithm.