| Summary: | To more effectively select the method that reduces the impact of time delay in digital control on inverter stability and improve the robustness of an inverter, a discrete model of the inverter with inverter-side current feedback control is first established in the two-phase stationary frame in this paper. Then, based on this model, systematic study is carried out on the inverter stability under half sampling time delay method and linear predictor method respectively. It is found that, compared with one sampling time delay method, half sampling time delay method and linear predictor method are both able to reduce the influence of time delay on inverter stability. Moreover, analysis shows that half sampling time delay method have a better performance than linear predictor method. Finally, experiment results are presented to prove the correctness of theoretical analysis.
|
|---|