考虑时序配合的主从微电网平滑切换控制

微电网具有离网和并网两种典型运行模式,而平滑切换技术是保障模式间平稳过渡的关键.研究了微电网切换过程中控制模式切换与物理状态切换之间存在的时序配合问题.给出了可行的时序配合准则,进一步结合主从微电网中储能系统的集中控制方式,提出了考虑切换时序协调配合的微电网平滑切换控制策略.通过仿真分析和现场运行测试,验证了所提控制策略的正确性和有效性.

Smooth Transition Control in a Master-Slave Micro-Grid Considering Timing-Sequence-Coordination

Grid-connected operation and stand-alone operation are two typical operation modes in micro-grid. Smooth transition between operation modes is the key technique to guarantee the micro-grid working well. Timing- sequence-coordination between physical states switching and control modes switching was studied, and the effective timing-coordination criterion was proposed. The proposed control strategy is focused on the master unit, and based on the coordination of switching timing-sequence. The simulation and field application show that the smooth transition control strategies are correct and effective.