贾僖泉,龚仁喜.并联DC/DC变换器的混杂系统建模与优化控制[J].电测与仪表,2016,53(4):. jiaxiquan,Gongrenxi.Hybrid Dynamic Modeling and Model Predictive Control for Parallel Buck DC/DC Converter[J].Electrical Measurement & Instrumentation,2016,53(4):.
并联DC/DC变换器的混杂系统建模与优化控制
Hybrid Dynamic Modeling and Model Predictive Control for Parallel Buck DC/DC Converter
A DC/DC converter is a typical kind of hybrid system. It is difficult to characterize its hybrid characteristics by traditional modeling methods. In this paper, a v-step modeling approach is introduced to deeply analyze the dynamic process of parallel DC/DC converter and deduce its dynamic evolution equation, thus yielding the mixed logical dynamical (MLD) model. On the basis of it, a control strategy combining model predictive control and interleaving PWM technology is proposed to implement the optimal control of a DC/DC converter. In order to verify the effectiveness of the control, a system simulation experiment is made. And the obtained results show that the strategy enables the system to quickly and efficiently track the reference signal and quickly return to its steady state with small magnitude change even in such a case where the input voltage or load resistance suddenly changes, the system has a good dynamic performance.
