| Abstract: | Dual‐loop control of the instantaneous values plays an important role in inverters whose output waveform has fast dynamic response, high steady‐state accuracy, and strong anti‐interference performances. Double closed‐loop control approaches that are widely used can be considered as those of the inner‐loop inductor current and capacitor current. However, the anti‐interference performance and the dynamic response speed of the former are not fast enough. Meanwhile, the latter cannot provide good overcurrent protection for the inverter source. Based on state‐space theory, the PI–PI control strategy of inner‐loop inductor current and outer‐loop voltage with feed‐forward control of the load current is adopted in this paper to further reduce the steady‐state error of the inverter system and improve its dynamic anti‐interference performance. The approach proposed in this paper can present fast and high‐stability performances as well as an effective overcurrent protection for the inverters. We verify the correctness of this approach by simulation and experiments, which prove the improved effectiveness of the approach through the output voltage waveform of the system. © 2014 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc. |
