商业楼宇型微网的应急能量管理策略

Emergency Energy Management Strategy for Commercial Building Microgrid

在配电网停电后,商业楼宇型微网进入孤岛运行状态。为减小停电给用户带来的损失、维持停电期间内对重要负荷的供电,针对光储型商业楼宇微网,提出了考虑计划停电与非计划停电2种情况的应急能量管理策略。在计划停电时,以减小停电损失、维持供电时间为目标建立了优化模型,并引入权重因子以权衡二者的重要程度;为减小预测误差对结果的影响,提出了滚动优化策略。在非计划停电时,以优先考虑对重要负荷供电为原则,制定了实时应急方案。通过算例对比分析可知,该策略可有效调节可控负荷投入量,从而实现预期目标。同时,在算例中进行了灵敏度分析,不同的权重因子可灵活调节减小停电损失与维持供电时间在优化目标中的比重。

When there is a power failure in distribution network,commercial building microgrid can be operated autonomously. In order to reduce the users＇ loss caused by power outage and preserve the power supply of important loads during blackout,this paper presents a novel emergency energy management strategy for commercial building microgrid with photovoltaic-battery system,where planned and unplanned outages are both taken into account. When the outage is planned,an optimization model is established,aiming to reduce outage loss and preserve power,and weighting factors are introduced to weigh the importance of reducing loss and preserving power. Rolling optimization strategy is proposed to reduce the prediction errors on the result. When the outage is unplanned,a real-time emergency program is established,follow ing the principle of giving priority to preserve the power supply of important loads. Comprehensive results obtained from comparison simulations show that the proposed strategy is efficacious in adjusting the input of controllable loads to reach the desired goals. Additionally,sensitivity analysis is carried out in case study section,and different weighting factors will flexibly adjust the importance of reducing outage loss and preserving power in the optimization goal.