摘要
微电网存在两种运行模式,即并网运行和孤岛运行模式。微电网并网运行模式向孤岛运行模式的平滑切换对实现微电网正常运行以及负荷可靠供电有着重要的意义。提出了一种自适应系数的下垂控制方法应用于并网模式转变为孤岛模式,并分析了自适应系数下垂控制方法的工作原理,能够有效地解决并网模式向孤岛模式切换时引起的电压波动大、频率不稳定的情况。最后用MATLAB仿真证明了此方法的可行性。
There are two operating modes in micro-grid, grid-connected mode and islanded mode. The grid-con- nected mode smooth switching to islanded mode is very important and meaningful to reliable power supply and normal operation. A droop control method with the daptive droop factor is used in the grid-connected mode smooth switching to islanded mode. It＇s working principle is analyzed. The proposed approach can effectively solve the voltage fluctuations and unstable frequency problems occurred when the grid-connected mode switches to islanded mode. Finally, MATLAB simulation prove the feasibility of this method.
出处
《电力科学与工程》
2014年第7期60-64,共5页
Electric Power Science and Engineering
关键词
微电网
并网运行
孤岛运行
自适应系数
平滑切换
micro-grid
grid-connected mode
islanded mode
adaptive droop factor
smooth switching
