PCI控制的九开关逆变器及谐波补偿控制研究

摘要:

针对独立电源系统中，传统逆变电路与谐波补偿电路为两个并联式三相电压型逆变器，存在生产成本高、体积庞大、PI控制策略下逆变输出电流质量较差等问题。提出一种逆变与APF谐波补偿一体化的九开关控制拓扑结构，同时对九开关逆变器采用PCI控制策略，可在 坐标系下追踪交流信号减小稳态误差。通过Matlab/Simulink环境中的仿真研究表明，该控制方案能实现交流信号幅值和相位零稳态误差，加快系统的动态响应，明显减小电流信号的波动，保证了系统的稳态和动态性能。同时，系统谐波补偿效果较好，THD值下降，输出得到稳定的三相正弦交流信号，证实了该方法的有效性。

Abstract:

Aiming at the problem of high production costs, excessive volume and quality poor of output current of inverters in the traditional inverters and harmonic compensation circuit which is two parallel three-phase voltage type inverters. A kind of inverter and APF harmonic compensation integrated nine-switch topology for the independent power supply is proposed. In order to reduce steady-state error and increase stability, specific PCI control strategy is presented, which can reduce the steady-state error of tracking ac signals. Finally, the simulation results in Matlab/Simulink environment show that this scheme can not only achieve AC signal amplitude and phase zero steady-state error, but also accelerate the dynamic response of the system, and significantly reduce the fluctuation of the current signal. It ensures the steady state and dynamic performance of the system. The harmonic compensation effect is better and reduce THD. Comparison shows that output obtains a stable three-phase sinusoidal AC signal, which confirms the effectiveness of this method.