基于空间矢量脉宽调制控制的四桥分布式电力并网逆变器

针对分布式发电与电力系统相联的电网中不平衡和非线性负载采用了一种三相四桥臂拓扑结构。、提出了一种四桥臂三相逆变器的二维SVM控制方案；其前三个桥臂由二维SVM控制，第四桥臂解耦控制。所构建的控制器具有电压利用率高、开关频率相对较低、控制灵活和实现简单等优点。仿真和实验结果验证了该控制方案的正确性与可行性。

Space Vector Pulse Width Modulation Control Based Four Leg Inverter for Grid Integration of Distributed Powers

A three-phase four-leg topology structure is introduced for unbalanced and nonlinear loads in the large-scale power systems with distributed generation integrated into. This paper presents a control scheme of two-dimensional space vector modulation （SVM） for four-leg three-phase inverter. The first three legs are controlled by two-dimensional SVM method and the fourth leg is decoupling controlled independently. This control scheme has advantages such as high voltage utilization, low switching frequency, flexible con-trol, and simple realization. Simulation and experimental results verify the validity and feasibility of the proposed control scheme.