含有微源逆变器串联子系统的微电网结构研究

Study of micro-grid structure with series subsystem of micro-source inverter

鉴于串联子系统的诸多优点,研究了一种含有微源逆变器串联子系统的微电网结构。介绍了该微电网结构,并分析了逆变单元发生故障时冗余串联子系统的接入方式;对该结构中混合型微源的直流变换环节进行控制以维持直流链电压的稳定;以含2个串联子系统的孤岛微电网为例对直流链电压的稳定控制及逆变单元发生故障由冗余串联子系统提供电压支撑进行Matlab/Simulink仿真分析,结果验证了该微电网结构的可行性。

Aiming at the series subsystem with many advantages,a kind of micro- grid structure which connects the hybrid micro- source is studied in this paper. The structure of the micro- grid is introduced and access method of redundant series subsystems is analyzed. In order to keep the DC link voltage stable,DC converters of hybrid micro- source are controlled. Matlab / Simulink simulation analysis based on the islanding micro- grid with two series subsystem is made. Simulation results verified the effectiveness of micro- grid structure.