DAB变换器回流功率优化的三重相移控制

Triple Phase Shift Control for Optimal Return Power of DAB Converter

针对DAB变换器功率回流问题,提出一种DAB变换器回流功率优化的三重相移控制策略。根据双有源桥变换器的工作原理,分析了回流功率产生的原因,推导出传输功率、回流功率与相移角间的关系。以单个双有源桥变换器为研究对象,在三重相移调制的基础上,结合遗传算法和非线性规划寻优,计算得出最优的相移角组合,降低回流功率。在simulink中进行仿真,验证了所提的控制策略与传统单相移控制、双重控制相比,可以基本消除回流功率,提高变换器功率因数。

Aiming at the power return problem of DAB converter,a triple phase shift control strategy for optimizing the return power of DAB converter is proposed.According to the working principle of the dual active bridge converter,the causes of the return power were analyzed,and the relationship between the transmission power,the return power and the phase shift angle was derived.Taking a single dual active bridge converter as the research object,on the basis of triple phase shift modulation,combining genetic algorithm and nonlinear programming to optimize,the optimal phase shift angle combination was calculated to reduce the return power.The simulation in Simulink verifies that the proposed control strategy can basically eliminate the return power and improve the power factor of the converter compared with the traditional single-phase shift control and double-phase shift control.