Design and Analysis of the synchronization control method for BCM/DCM current-mode flyback micro-inverter
Design and Analysis of the synchronization control method for BCM/DCM current-mode flyback micro-inverter
复制标题
DOI：
10.1109/apec.2013.6520187
复制
发表时间：
2013-03
期刊：
影响因子：
--
通讯作者：
Zhe Zhang;Min Chen;Wang Chen;Z. Qian
中科院分区：
文献类型：
--
作者：
Zhe Zhang;Min Chen;Wang Chen;Z. Qian
微型逆变器可以直接与光伏板集成，以产生与电网兼容的交流电源。将两个反激变换器并联作为DC-DC级，并利用交错扩展反激微型逆变器的功率范围。本文首先分析了工作在边界导通模式（BCM）和具有主从关系的断续导通模式（DCM）下的反激微逆变器的开环交错技术。然后，提出了一种新的交错相位同步控制方法，以实现高功率转换效率和稳定运行。在DCM工作区域将采用开环相位调节技术，而在BCM工作区域将采用闭环相位调节技术。搭建了一个200w的交错反激微逆变器样机，验证了交错同步控制方法。仿真和实验结果表明，所提出的闭环控制方法在保持良好的效率和较低的THD性能的同时，可以实现稳定的交错相位同步。
A micro-inverter could be directly integrated with a PV panel to generate grid-compatible AC power. Placing two flyback converters in parallel as the DC-DC stage and utilizing interleaving extends the power range of flyback micro-inverters. In this paper, open-loop interleaving technique for flyback micro-inverter operating at the boundary conduction mode (BCM) and discontinuous conduction mode (DCM) with a master-slave relationship are analyzed first. Then, a novel interleaving phase synchronization control method is proposed to achieve high power conversion efficiency and stable operation at the same time. In DCM operation region the open-loop phase regulation will be utilized while in BCM a closed-loop technique will dominate. A 200 W interleaved flyback micro-inverter prototype is built to verify the proposed interleaving synchronization control method. Simulation and Experimental results are provided to show that the proposed closed-loop control method could achieve stable interleaving phase synchronization while maintain good efficiency and low THD performance.