Abstract: 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, following 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.

Key words: planned/unplanned outage, emergency energy management, rolling optimization strategy, commercial building microgrid, microgrid