基于改进载波调制算法三电平并网逆变器研究

针对传统载波调制实现比较复杂的缺点,提出了一种改进的单载波调制方法,它利用一个载波与一个调制信号进行比较,并结合脉冲发生和分配原则,使软件实现变得更容易。详细分析了其原理,并在Matlab中建立了仿真模型,最后搭建实验平台进行验证。仿真和实验结果证明了所提出的单载波调制方法和并网逆变器控制策略的可行性和中点平衡控制的有效性。

Research on Three-level Grid Inverter Based on an Improved Carrier Modulation Algorithm

Because the traditional carrier modulation is complex to realize,a single-carrier modulation method is proposed.It uses a carrier to compare with a modulation signal,combine with pulse occurrence and distribution principle,so that the software become easier.Giving the detailed analysis of the working principle,the simulation model in Matlab software is es-tablished,finally the experimental platform is set up.The simulation and experimental results verify the feasibility of the single-carrier modulation method and the control strategy of grid inverter,and the control method of neutral point voltage balance is effective.