Analysis and Reliability Assessment for a Bidirectional Single-Stage DAB-Based Three-Port Photovoltaic Energy Storage Inverter

With the gradual popularization of the concept of carbon neutrality, more and more sustainable energy sources are being developed and applied. Corresponding photovoltaic (PV) systems that rely on batteries for stable output require three-port inverters with high stability and efficiency. Due to the lack of research on the PV energy storage inverter itself and its reliability, this paper first makes A theoretical analysis of a three-port converter based on bidirectional single-stage DAB. Secondly, the reliability and mean time to failure analysis of the proposed three-port topology under different working conditions are carried out. Finally, the paper gives the conditional parameters of theoretical analysis and simulation, and gives the simulation waveform of the proposed topology under different working conditions, proving the feasibility of the topology.