采用干扰观测器PI控制的单相SPWM逆变电源

摘要

The PI control strategy with disturbance observer is adopted in the single-phase SPWM inverter. Compre-hensive theoretical analysis of this control strategy and traditional PI control is given,and the inverter systems with these two controllers are designed and simulated respectively in MATLAB. Besides,the control schemes are imple-mented on DSP platform using digital control algorithm. The simulation result and experimental result prove that com-pared with traditional PI control,the proposed scheme can achieve good dynamic and steady-state performance with better harmonic suppression,thus verifies the correctness of the theoretical analysis.%采用了一种干扰观测器PI控制的单相正弦脉宽调制（ SPWM）逆变电源的控制方案。对该控制策略与传统的PI控制均进行了全面的理论分析，在MATLAB中对分别采用这两种控制策略的逆变电源系统进行了仿真设计，并在DSP平台上采用数字控制算法实现了这两种控制方案。仿真结果与实验结果均表明，与传统的PI控制相比该控制方案能获得更好的动、稳态性能，具有更好的谐波抑制能力，从而验证了理论分析的正确性。