双闭环控制SVG及脉冲封锁仿真研究

Study on SVG simulation with dual closed-loop control and pulse latching

介绍SVG的主体结构和基本原理,在dq坐标系下对SVG拓扑结构进行建模,通过比较选择了SVG电流直接控制方法。考虑到直流侧电容电压稳定的要求,设计了电压电流双闭环PWM控制系统,并对脉冲封锁运行方式进行了研究,用Matlab/Simulink对SVG进行系统仿真,表明了SVG具有良好的动态性能,验证了双闭环控制及脉冲封锁运行方式的正确性与有效性。

The SVG main circuit and the basic principles of SVG were introduced. SVG topology modeling in dq coordinate process was finished. Then SVG direct current control method was selected by comparing as well.Considering stability requirement to the DC side voltage, voltage and current dual closed-loop PWM control system was designed, and the pulse latching operation mode was studied. Finally, SVG system was simulated using the Matlab/Simulink. Results show that SVG has a good dynamic performance, verifying the correctness and validity of the dual closed-loop control and pulse latching operation mode.