| Environmental pollution, depletion of oil resources and other issues is increasing sparked the development of new environmentally friendly energy boom. Owing to a single cell can not satisfy the high specific power and high specific energy dual needs, resulting hybrid power ideas which combine the two complementary performance of energy storage. A reasonable control of bi-directional transformation system in composite power storage can better implement the "peak load shifting" effect of Supercapacitor on the battery. From the perspectives of improving composite power dynamic performance and better lengthen the service life of the battery, this paper proposed composite power bi-directional DC/DC converter polynomial control to optimize system performance. In bi-directional Buck/Boost converter with Interleaved Integrated Magnetic Technology can improve the efficiency and dynamic current response speed, better achieving supercapacitor priority charge-discharge and improving hybrid power energy system efficiency. Analyzing and modeling for supercapacitor and battery in composite power, then on the basis of the power direction in different operation modes, analyzing the operational modal for interleaved integrated magnetic Buck/Boost converter and elaborating converter operational principle and the main parameter setting. Setting the appropriate control objectives for different working modes in composite power, established the corresponding modal small singal model and mathematical expressions between control variables to the state variable. Energy regulation controller was designed on account of the Polynomial algorithm and its parameters were tuning. Describes composite power bi-directional conversion system hardware circuits and control diagram. Finally, analysis the matlab simulation diagram and experimental verify the theory analysis. |
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