Method for analyzing transmission power limit and bayonet fault of power transmission section of power system

By identifying the set of adjustable generator sets at the sending end, generating a fault set, and optimizing the algorithm, combined with a repetitive power flow strategy, the transmission power limit and bottleneck faults of the transmission section are automatically identified. This solves the problem that existing technologies cannot efficiently identify key faults and achieves direct decision support for the safety and stability of the power grid.

CN122456497APending Publication Date: 2026-07-24STATE GRID SICHUAN ELECTRIC POWER CORP ELECTRIC POWER RES INST
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Patent Information

Application Number
CN202610581760.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-04-29
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

Existing technologies lack an automated analysis model that systematically correlates transient stability constraints, transmission section power limits, and dominant faults leading to instability. Dispatchers find it difficult to quickly identify the key faults that truly restrict the transmission capacity of a section from massive fault simulation results, and thus cannot provide direct and efficient decision support for power grid reinforcement and security control strategy formulation.

Method used

By identifying the set of adjustable generator units at the sending end based on the topological connection relationship of the power system, a fault set for transient stability analysis is generated. The unit combination model is solved by a group relative strategy optimization algorithm. The transmission power is improved iteratively by combining the repetitive power flow strategy. Transient stability simulation verification is performed, the severity of bottleneck faults is automatically identified, and a list of key faults is output.

Benefits of technology

It enables precise and automated determination of transmission power limits at transmission sections and efficient identification of bottleneck faults, providing direct decision support and improving the safety, stability, and rapid response capabilities of the power grid.

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Abstract

The invention discloses a power system transmission section transmission power limit and bayonet fault analysis method. Constructing a system topology undirected graph capable of representing a topological structure of a power system, establishing a power transmission section parameter model of a standardized operation mode, and determining a sending end and a receiving end of a power transmission section; further constructing a power system transmission section sending end unit automatic search model based on a topology analysis method, and generating fault cards for transient stability analysis for different elements and fault types in batches; constructing a power transmission section transmission power analysis model based on GRPO, constructing a power transmission section transient stability transmission limit calculation model by adopting a repetitive power flow strategy, and determining a transient stability transmission limit of a target power transmission section; and constructing a power transmission section bayonet fault identification model considering transient stability constraint, and identifying a key fault restricting the transmission capability of the target power transmission section.
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