Electric power system optimized generator tripping method based on implicit enumeration method

Abstract

The invention discloses an electric power system optimized generator tripping method based on an implicit enumeration method. An optimized generator tripping problem is a typical 0-1 planning problem. In the process that the implicit enumeration method is applied to solving the optimized generator tripping problem, firstly, according to an input alternative generator tripping object and the needed generator tripping amount, an electric power system generator tripping selection 0-1 planning problem model is established, and a corresponding binary search tree is established; then, a search strategy, a pruning strategy and a terminal strategy of the optimized generator tripping problem are solved according to the implicit enumeration method, search is performed along the binary search tree, and search ceaselessly approaches to an optimal solution; when the requirements of a terminal criterion are met, the solving process is completed. By means of the optimized generator tripping method based on the implicit enumeration method, on one hand, the optimal calculation time of a device is shortened, and fast generator tripping is achieved; on the other hand, optimal generator tripping is achieved, and safe and stable running of a power grid is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of electric power systems, and relates to a method for selecting a power system cut-off machine, in particular to a power system cut-off method based on an implicit enumeration method. Background technique [0002] When the power grid is subjected to the second type of large disturbance, the power system will enter an emergency state. At this time, the second line of defense of the power grid will play a role. According to the pre-considered fault form and operation mode, according to the predetermined control strategy, the safety and stability control system is adopted. (Device) Implement control measures such as machine cutting, load shedding, and partial decoupling to prevent the system from losing stability. [0003] In the process of shutting down the safety and stability control system, it will first identify the fault form and type, then calculate the required shutting down amount according to the con...

AI Technical Summary

Problems solved by technology

[0004] At present, the algorithm used for matching machine-cutting combinations is the exhaustive method. In view of the rapid development of the grid scale and the increase in the number of machine-cutting objects in emergency situations, the calculation time of the exhaustive method is too long, which cannot meet the needs of large-scale power grid stability control systems. Requirements for fast cutting machine and load cutting

This has certain potential safety hazards for maintaining the safe and stable operation of the power grid in emergency situations.

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