光伏储能系统交错并联磁集成变换器控制研究

Control research of Staggered parallel magnetic DC-DC converters for pv system

本文以储能光伏系统交错并联磁集成Buck-Boost变换器的Buck工作模式为研究对象，首先对多相磁集成双向DC-DC变换器进行耦合电感研究设计，分析变换器Buck工作模态，采用小信号建模方式推演出状态变量到控制变量的传递函数，根据两相交错并联磁集成Buck变换器的开环特性，设计出相应的补偿网络，提出基于平均电流控制策略对系统加以优化，最后对系统进行仿真和实验，结果表明，基于电流平均控制策略与传统控制方式相比，提高了系统的稳态性能和动态特性，同时采用的磁集成耦合电感设计降低输出电流纹波，改善了系统稳态特性。

Study multiphase bi-directional DC/DC converter coupling inductance, magnetic integration using the state variables from the small signal modeling approach to the transfer function of control variables, design the corresponding compensation network, based on average current control strategy is proposed for system optimization, finally the sinmlation and experhnent, the results shiny that based on average current control strategy is compared with the traditional control mode, improve the steady-state performance and dynamic characteristic of the system, and the integration of magnetic coupling inductor design are adopted to decrease the output current ripple, improve the system steady state characteristics.