A Numerical Parameter Optimization Design Method For Isolated Tripe Active Bridge Converter

To enhance the operational efficiency of multi-port converters across their entire working range, this paper proposes a numerical parameter optimization design method based on hierarchical constraints. We provide a detailed analysis of the working principle of the isolated three-active-bridge converter and establish a frequency-domain steady-state analysis model. Building on this foundation, we sequentially introduce constraints such as voltage gain, maximum power, and Zero Voltage Switching (ZVS) alongside the converter's operating characteristics and safe operating domain. This approach significantly reduces the parameter design space and simplifies the optimization process. Next, we optimize the main circuit parameters of the multi-port converter with the objective of minimizing the weighted average loss across the full operating range. Our proposed method takes into account the complex coupling of the main circuit parameters, thereby avoiding efficiency degradation that can arise from overlooking these interactions. Moreover, the optimization process is grounded in the full operating domain, ensuring efficient performance across various loads and operating conditions.