摘要
微电网孤岛和并网模式切换时,为了减小对大电网和微电网造成的冲击,提出同步并网控制方法。在采用P-f和Q-V下垂控制策略的基础上,设计了同步并网控制流程。根据电网和微电网输出的电压进行同步调节,使得两者的电压幅值差、频率差和相角差满足并网要求,以实现微电网在孤岛和并网两者模式之间的平滑切换。最后,在Matlab/Simulink仿真软件中建立微电网运行控制模型。仿真结果表明,所提出的方法实现了微电网在两种模式之间的平滑切换和在双模式下的稳态运行。
In order to reduce the impact on grid and micro-grid when the micro-grid changes operating mode, a synchro- nization control strategy is proposed. The droop control based on P - f and Q - v characteristics is applied, and a synchro- nization control process is designed. To enable a smooth transition between the island and grid-connected mode of micro- grid, this paper makes the voltage magnitude difference, frequency difference and phase angle difference between grid and micro-grid to meet the grid-connecting requirements by adjusting their output voltage. Finally, an operation and control mode is established in Matlah/Simulink simulation software. Simulation results show that a smooth switching between two modes and a steady operation in dual-mode are realized by the proposed method.
出处
《电气开关》
2015年第2期31-35,共5页
Electric Switchgear
关键词
微电网
下垂控制
同步并网控制
模式切换
micro-grid
drooped control
grid-connecting synchronization control
mode transition
作者简介
朱桃兰（1990-），女，硕士研究生，研究方向：微电网运行与控制；
王倩（1962-），女．教授，硕士生导师．研究方向：电力系统调度自动化；
黄付顺（1990-）。男，硕士研究生．研究方向：分布式电源运行优化。
