Research on Model Predictive Control Method for Multi-paralleled DC-DC Converters

With the continuous increase of battery capacity in the power battery charging and discharging system(PBCDS), the charging and discharging equipment of power battery also needs to output large power or energy, so the multi-DC-DC parallel-connected structure on the battery side becomes the first choice. In addition, considering the traditional PI control method have a complex parameter adjustment process and the complexity of parameter adjustment increases sharply with the parallel-connected of multi-DC-DC, but also it cannot meet the special requirements of high dynamic response speed and non-overshoot in the power battery charging and discharging process(PBCDP). Therefore, this paper innovatively proposed a model predictive control method for the parallel-connected system with n DC-DC converters, which does not require complicated parameter tuning, but also achieves the special requirements of high dynamic response speed and non-overshoot in the PBCDP. The method has strong universality and high flexibility, and can be applied to power battery charge and discharge conditions with any level of power. Finally, the simulation is conducted to validate the feasibility and correctness of the proposed MPC control method.