分布式电源并网逆变器无缝切换控制策略  

Control Strategy Based Seamless Switch of Grid-tied Inverter in Distributed Generation

作　　者：杨永超[1] 周志钢[2] 

机构地区：[1]湖北民族学院信息工程学院,恩施445000 [2]沈阳工业大学电气工程学院,沈阳110870

出　　处：《电力系统及其自动化学报》2016年第8期91-97,共7页Proceedings of the CSU-EPSA

摘　　要：为解决分布式发电系统中不同微电源逆变器控制策略的差异以及相互之间切换的问题,提出了一种基于虚拟同步发电机的微电网并网/孤岛运行模式之间的无缝切换控制策略。分析了虚拟同步发电机、恒压频比和恒定功率控制方式,在孤岛运行模式下主逆变器采用基于虚拟同步发电机控制、恒压恒频控制,提出一种在2种运行模式之间无缝切换的主逆变器控制策略。最后,在Matlab/Simulink环境下进行了仿真。仿真结果表明,所提的基于虚拟同步发电机的无缝切换控制策略实现了微电网运行模式之间的无缝切换。In order to solve the problem of differences between micro-power inverter control strategies and the switch be- tween each other, the control strategy of micro-grid seamless switch between grid-tied and islanded operation modes is proposed based on a virtual synchronous generator （VSG）. Then the control strategies are analyzed based on VSG, con- stant voltage and frequency （V/f） , constant active and reactive power （PQ）. The control effects of master-inverter based on VSG and V/f control in micro-grid islanded mode, and a master-inverter control strategy of seamless switch be- tween grid-tied and islanded operation modes, are also analyzed. Finally, the simulation results in Matlab/Simulink en- vironment show that the proposed control strategy can realize the seamless switch between micro-grid operation modes.

关 键 词：分布式发电 逆变器 虚拟同步发电机 无缝切换 恒压恒频 恒定功率 

分 类 号：TM743[电气工程—电力系统及自动化]