光储型商业楼宇微电网应急能量管理策略

Emergency Energy Management Strategy for Commercial Building Microgrid Consisting of Photovoltaic-Battery System

微电网的应急能量管理需兼顾减小停电影响范围与维持供电时间两方面。针对含有光储系统的商业楼宇型微电网,提出了一种基于鲁棒优化的应急能量管理策略,并在确定可控负荷投入量后,给出了以"先调节、后切除"为原则的可控负荷调节方案。应急能量管理策略在鲁棒优化模型的基础上引入了滚动优化的思想,且在优化模型中设置了权重因子以权衡减小影响与维持供电二者的重要程度,设置了不确定度以调节不确定因素对问题的影响程度。通过算例对比分析、灵敏度分析与不确定度分析可知,该策略可灵活设定权重因子与不确定度以合理调整可控负荷的投入量,从而实现预期目标。此外,可以从可控负荷调节方案中获得电动汽车的实时充电倍率和空调的实时环境温度。

Reducing the impact scope of power failure caused by power outage and preserving the power supply should be both taken into account for microgrid emergency energy management after the failure of electricity supply in distribution network.This paper presents an emergency energy management strategy based on robust optimization for commercial building microgrid consisting of photovoltaic-battery system,and controllable loads regulation scheme is proposed after obtaining the inputs of controllable loads,following the principle of‘‘first adjustment,then cutting off”.The proposed strategy embraces the thought of rolling optimization.Besides,based on robust optimization model,weighting factors are introduced to weigh the importance of reducing the impact and preserving power,and uncertainty is set up to adjust the influence of uncertain factors on the problem.Comprehensive results obtained from comparative analysis,sensitivity analysis and uncertainty analysis have shown that the proposed strategy is effective in adjusting the inputs of controllable loads to reach the desired goals by changing weighting factors and uncertainty flexibly.Moreover,real-time charging rate of electric vehicles and real-time ambient temperature of air conditioners can be obtained from controllable loads regulation scheme.