【摘要】 传统移相控制策略在串联谐振型三端口变换器（Series-Resonant Three-Port-Converter, SR-TPC）端口电压不匹配时，存在回流功率较大、软开关范围小的问题。文章提出了一种基于移相加占空比（PWM）控制策略下的回流功率优化方法。利用基波分析法和相量法给出SR-TPC的复功率模型，在保证传输一定有功功率的前提下，通过对SR-TPC回流功率模型的分析，给出变换器在回流功率为零时的最优控制策略，并求解出最优控制变量，进一步分析在优化控制策略下达到软开关的条件，对比其他两种控制方式下的软开关范围。Matlab/Simulink仿真结果表明，在端口电压不匹配的条件下，SR-TPC在优化控制策略下的回流功率小、软开关范围宽、效率高。更多还原

【Abstract】 Series-Resonant Three-Port-Converter(SR-TPC) applies the traditional phase-shifting control strategy when the port voltage mismatch which has the problems of large reflow power and small soft switching range, and this paper will propose a reflux power optimization method based on the phase-shifting plus duty cycle(PWM) control strategy. The complex power model of SR-TPC is given by fundamental analysis method and phasor method, and the optimal control strategy of the converter when the reactive power is zero is given and the optimal control variable is solved through the analysis of the SR-TPC reactive power(reflux power) model under the premise of ensuring the transmission of certain active power. Furthermore, the conditions for realizing soft switching under the optimized control strategy are further analyzed, and the soft switching range under the two control modes is compared. Finally, the Matlab/Simulink simulation results show that compared with the traditional phase shift control strategy, the SR-TPC reflow power under the optimized control strategy has a smaller reflux power, a wider soft switching range, and higher efficiency under the condition of port voltage mismatch.更多还原