Resilience-Oriented District Integrated Energy System Scheduling Considering Island Formation in Natural Disasters

Natural disasters (e.g., hurricane and rainstorm) can threaten the normal operation of district integrated energy systems (IESs). Exploiting the resilient scheduling of IESs against natural disasters can provide a promising solution to sustain the critical services. In this paper, a resilient IES scheduling approach considering the island formation is proposed to handle multiple contingencies cause by disasters (faulted lines and pipes). The IES is sectionalized into multiple islanded areas, each of which is supported by a distributed generator or a heat and power plants to satisfy maximum self-adequacy. The fictitious flow is introduced to guarantee the radiality of the topology. Then, the optimal IES scheduling strategy is determined by coordinating power, thermal and natural gas networks. As the IES scheduling model considering island formation is nonlinear, both the McCormick envelop and polygonal inner approximation methods are applied to make the problem tractable. Finally, case studies are conducted and the simulation results show the effectiveness of the proposed scheduling method in reducing the catastrophic impacts on the service and improving the resilience of IES.