Power distribution network multi-fault first-aid repair recovery method and system considering pre-disaster pre-scheduling

Abstract

The invention relates to a power distribution network multi-fault first-aid repair recovery method and system considering pre-disaster pre-scheduling. The method comprises the steps: determining the outage probability of an element, and generating an anticipated accident set; calculating a system direct-current power flow; sequentially quitting the load nodes in the anticipated accident set to judge whether the system has faults or not, and if so, merging the fault nodes into an accident determination set; judging whether all nodes in the system are judged to be finished or not, and if so, obtaining an accident determination set; if not, obtaining the information of the next node; determining a system fault position and a subarea to which a fault element belongs based on the accident determination set, and constructing a path scheduling scheme; determining a DG output prediction curve by adopting a DG output prediction method based on nearest neighbor clustering; and based on the DG output prediction curve, determining a power distribution network first-aid repair recovery scheme by constructing a multi-source collaborative optimization model. The fault first-aid repair efficiencycan be effectively improved, the first-aid repair sequence is optimized, the first-aid repair plan is adjusted in real time, and the power supply capacity of available resources of the power distribution network is optimized.

Description

technical field [0001] The invention relates to the field of power system analysis, in particular to a multi-fault emergency repair recovery method and system for a distribution network considering pre-disaster pre-scheduling. Background technique [0002] The traditional distribution network fault recovery problem refers to that after the distribution network fault occurs, on the basis of fault location and fault isolation, a certain fault recovery strategy is adopted to operate the tie switch and section switch of the distribution network. Transfer the outage load to other feeders for power supply, find the best path to restore power supply in the non-fault area in time, and complete the task of distribution network fault recovery. Distribution network power supply restoration is a high-order, multi-constrained nonlinear combination problem. Especially after the microgrid is added, the system network structure becomes more complex, and new challenges are proposed for the r...

AI Technical Summary

Problems solved by technology

However, as the penetration rate of distributed power continues to increase, the participation of demand-side loads, and the operation mode of the distribution network become more flexible and changeable, only considering this recovery method will no longer be applicable to the current operation of the distribution network, especially in severe weather Under such circumstances, the distribution network may be severely damaged, and multiple faults may occur, leading to large-scale, continuous, and long-term power outages. Therefore, how to make full and efficient use of existing flexible resources to improve the dispatching efficiency of rescue supplies, realize the rapid recovery of the distribution network, and improve the resilient response of the distribution network has become the research focus of the present invention.

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