As the coupling and interaction between heterogeneous energy sources in the integrated energy system deepen
operational risks are becoming increasingly significant. To mitigate the impact of extreme disaster events on the system
a line sequence repairing method of the integrated energy system aimed at enhancing resilience is proposed. Firstly
branch state variables are introduced. An islanding partitioning model based on fictitious flow is established
ensuring the continuous supply of critical loads. Secondly
a two-stage line sequence repairing model is developed. In the first stage
the objective is to minimize costs related to load curtailment
switch operation
wind and solar power curtailment penalties
coupling component operation
and start-stop
thereby formulating a plan for network reconstruction and islanding. In the second stage
the goal is to minimize post-repair power loss at node loads to determine the optimal repair sequence. Finally
a test system consisting of an IEEE 33-node system
an 11-node gas network
and a 6-node heat network and an actual integrated energy system are used for simulation verification. The results demonstrate that through dynamic cycles of network reconstruction
islanding partitioning
and temporal repairs
the system achieves efficient recovery
reduces load loss throughout the fault process
and enhances system resilience under extreme weather.
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