含多微网的主动配电网分层调度策略

Hierarchical scheduling strategy for active distribution network with multi-microgrids

近年来,可再生能源高渗透率接入电网面临着明显的弃风弃光现象。微网为可再生能源的充分利用提供了良好的平台,主动配电网下多微网间的协调调度将进一步提高可再生能源的利用率。将分层控制理论与多微网并列运行的配电网架构结合,提出一种以配网协调能力最强为目标的先配网后微网的两步动态分层调度策略。重点研究配网能量管理中心和微网EMS的信息交互过程,旨在最大化利用可再生能源,减少主动配电网与主网的交互功率,同时保证微网运行的经济性。最后,以含多微网的主动配电网为例分析,验证所提出策略的正确性。与其他策略的对比体现了所提策略在充分利用可再生能源、减少主动配电网与主网的交互功率、缩短优化用时方面的优势。

In recent years,renewable energy integration to power grids with high penetration is facing an obvious phenomenon of abandoning wind and solar energy.Microgrid provides a good platform for the full utilization of renewable energy,and the coordinated scheduling of multi-microgrids in Active Distribution Network(ADN)would further improve the utilization efficiency of renewable energy.Based on the combination of hierarchical control and the parallel operation of multi-microgrids in AND,a two-step hierarchical dynamic scheduling strategy is proposed,in which microgrids are optimized after the AND optimization to maximize their coordination capability.The information interaction process between the energy management center of the distribution network and that of the microgrid is also addressed to maximize the utilization of renewable energy and to reduce the interaction power between ADN and the main grid,as well as to ensure the economical operation of microgrids.Finally,an ADN with multi-microgrids is analyzed to verify the correctness of the proposed strategy.Comparison results show that the strategy has advantages in making full use of renewable energy,reducing scheduling time and interactive power between ADN and the main grid and shortening optimization time.