反激微型逆变器的混合控制策略研究

Research on Hybrid Control Scheme of Flyback Miniature Inverters

反激逆变器具有结构简单,体积小,高频隔离等优点。本文首先阐述推导了反激变换器的工作原理,并对其工作在不同的工作模式下的工作状态。针对对传统工作模式下反激变换器不同控制策略下的功率密度与损耗等方面存在不足,提出一种交错并联的反激逆变器工作在DCM/BCM混合模式下的控制策略,根据电网相位和输出功率的变化,选择不同的控制策略,弥补单一控制策略下存在的不足。并通过仿真验证控制策略的有效性和可行性。

Flyback inverter has the advantages of simple structure, small volume, high-frequency isolation and so on. This paper first introduced the working principle of the flyback converter, then analyzed and compared their working conditions in different operating modes. Aiming at the shortcomings of power density and power consumption under different control strategies of flyback converter in traditional working mode, proposed a control strategy of a interleaved-flyback inverter operating in DCM/BCM mixed mode. According to the changes of grid phase and output power, choosing different control strategy. The simulation results shows the effectiveness and feasibility of the control strategy.