基于三相交错变流器的直流微网稳压技术研究

摘要

微电网中电源和负荷经过变流器并入直流母线,DC/DC变流器具有能量双向流动的特点.采用三相交错式变流技术进行直流微电网并网运行时抑制功率波动,保持直流母线电压稳定;孤岛运行时为直流微电网提供母线电压支撑.为验证微电网孤岛运行时三相交错式变流器稳定直流母线电压的能力,搭建了物理实验平台,对三相交错式变流器稳定直流母线的电压进行了实验验证.%Microgrid power supply and load through the converter are incorporated to the DC bus,having a bidirectional energy flow characteristics in DC/DC converter.A three-phase interleaved DC converter technology is used for microgrid merged into grid and suppressing power fluctuation,maintaining the DC bus voltage stabilizing role.Providing DC link voltage microgrid supports when work is islanding runtime.In order to test and verify microgrid islanding operation,three-phase interleaved converter stable DC bus voltage is verified through building physical experimental platform,and three-phase interleaved convert partially stabilized DC link voltage is verified.