Hybrid low switching frequency modulation strategy with high dynamic response for high‐power voltage source converter

For high-power converters, the low switching frequency (SF) modulation represented by selective harmonic elimination pulse width (SHE-PWM) is crucial to reduce loss and enhance efficiency with a good steady-state performance. However, since advantages of SHE-PWM mainly come from fixed angle distribution limited non-linear equations, angles should be adjusted slowly. This requires that bandwidth proportional integral (PI) controllers hugely, resulting in poor dynamic response. As most popular control improve response, finite-control-set model predictive (FCS-MPC) has worse performance under SF because large errors caused long prediction period harmonics space vector PWM (SVPWM). Therefore, hybrid strategy an acceptable complexity proposed this article, which combines FCS-MPC. PI + adopted steady state SF, while MPC SVPWM used transient high SF. By studying smooth level level, method can eliminate current surge when between SVPWM. Experiments verify have response simultaneously overall