Stability Analysis of Single-Phase Full H-bridge DC-AC Converter with Considering Time Delay and Parasitic Inductance Based on Small-Signal Model

With the development of renewable energy and distributed generation, DC-AC converters are widely used in the power system. For the safety of the power system, the analysis of the stability in the inverter is vital. For this issue, the small-signal model of the inverter is established in this paper. Some non-ideal components are investigated, like response delay time and the parasitic inductance of the resistance. This paper determines that these factors do affect the stability of the DC-AC converter. The slow-scale instability is detected by the small-signal analysis. In the final, the experimental device is carried out to verify the correctness of the investigation.