Island division and fault repair cooperation method for improving post-disaster toughness of active power distribution network

By using a directed multi-commodity flow model in the active distribution network for island division and emergency repair coordinated optimization, the resilience improvement problem under high proportion of distributed energy and variable network topology is solved, and the rapid system recovery and resilience improvement is achieved.

CN120357548APending Publication Date: 2025-07-22CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Patent Information

Application Number
CN202510429570.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-04-08
Publication Date
2025-07-22

AI Technical Summary

Technical Problem

The existing island division and fault repair methods are difficult to adapt to the high proportion of distributed energy and variable network topology in active distribution networks, resulting in poor results in post-disaster resilience improvement.

Method used

The directed multi-commodity flow model is used to divide islands, combine the coordinated optimization of emergency repairs in faults, and dynamically adjust the network topology and emergency repair strategies to maximize the system recovery status indicators and recovery process indicators.

Benefits of technology

The resilience level of active distribution networks in extreme events has been improved, and by fully leveraging the potential of distributed power supplies, the system performance recovery is accelerated and the toughness coefficient is improved.

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Abstract

According to the island division and fault repair cooperation method for improving the post-disaster toughness of the active power distribution network, firstly, toughness evaluation indexes reflecting the recovery state and the recovery process of a system are constructed in combination with a system performance curve; secondly, an island division model with maximization of a system recovery state index as a target is established, a directed multi-commodity flow model is adopted for network topology reconstruction in the model, and the DG utilization rate is better matched and improved; establishing a fault first-aid repair model which aims at maximizing indexes in a system recovery process so as to accelerate recovery of power supply to a power-losing load; the two models dynamically interact in the post-disaster operation and recovery process, and the system toughness is cooperatively improved. Example results show that compared with a traditional island division model based on spanning tree constraint and a fault first-aid repair strategy formulated according to the load importance degree, the method can improve the post-disaster power supply quantity of the system. And the response potentials of various DGs are mined by using the flexibility of the contact branch and the schedulability of emergency repair resources, so that the after-disaster toughness of the ADN can be further improved.
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Citation Information

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