Multi-period recovery strategy for improving distribution network resilience during extreme weather conditions
In extreme weather conditions,network reconfiguration and island partition are important means for fault recovery of distribution networks with distributed generations.According to the development process of meteorologi-cal disasters,the multi-period fault recovery strategy is conducive to improving the resilience of distribution net-work.The existing fault recovery strategies do not consider the operation cost of multiple network reconfigurations and island partitions,as well as the fluctuation of distributed power supply in the island,resulting in poor security and economic results of the optimization results.Therefore,this paper proposed a multi-period recovery strategy for improving distribution network resilience during extreme weather conditions.By constructing a unified model of ac-tive distribution network reconfiguration and island partition,considering the recovery time scale under different fault causes,and subdividing the time section,the strategy can realize the dynamic adjustment of distribution net-work structure during the fault duration,and improve the resilience of the power grid.Finally,the proposed strate-gy is verified in the IEEE 33-bus system.The case shows that the proposed strategy has fewer switching operations and higher load recovery rate;and it can resist power disturbances within a certain range,which can improve the resilience of the distribution network in extreme weather conditions.
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