Optimal Configuration Method of Power Grid Resources Considering Extreme Scenarios and Optimal Construction Time Sequence

In recent years, the global climate has changed rapidly, and extreme scenarios such as continuous high temperature, drought, floods, and hurricanes have seriously affected the operation of the power system. It is necessary for power grid planning to pay attention to the power balance in extreme scenarios. Therefore, a power grid resource allocation method considering the influence of extreme scenarios is proposed in this paper. First, the identification method of abrupt change points of the power system and meteorological factors based on the Pettitt test is proposed. Secondly, the extreme operation scenarios are selected from the abrupt points of the power system and the probability of occurrence is calculated by the time-series coupling judgment method. Then, the optimal grid construction time sequence model is constructed to minimize the total planning cost, which takes into account extreme and typical scenarios. Finally, a regional power grid is serverd as an example for demonstration, and the results show that the proposed method can consider the characteristics of the power grid in extreme scenarios, and can improve the economic benefits of planning by allocating resources in multiple stages. The cost of the optimal construction time sequence is reduced by 3.32 million yuan compared with that of the worst construction time sequence.