Closed-loop self-adaption emergency control method for large electric network 'centralized coordination, layered control'

Abstract

A closed loop self-adapting emergency control method of power pool' centralized harmonization and hierarchy control' is disclosed, which adopts the quadrilayer structure of a dispatching center station, a control main station, a control sub-station and a control execution station from top to bottom, including the following control steps: 1. safely and stably controlling the system uploading operation data to the dispatching center station; 2. controlling the decision-making computation by the dispatching center station to obtain the online strategy table; 3. sending down the online strategy to the control main station by the dispatching center station and furthermore sending down to the related control sub-station by the control main station; 4.judging the failure and the overload according to the related failure and the overloading criterion by the control sub-station and the execution station; 5. transmitting the failure information to the upper control station layer by layer by the control sub-station and the execution station; 6. performing the failure combination match by the control main station; 7. sending the cutting machine and the cutting load command tot he corresponding control sub-station by the control main station; 8. reprocessing and transmitting to the execution station by the control sub-station; 9. cutting machine and cutting load exit by the execution station.

Description

technical field [0001] The invention belongs to the field of power system stability control. More precisely, the invention relates to a control method for solving serious faults such as multiple faults and cascading faults in large power grids. Background technique [0002] As the scale of the power grid becomes larger and larger, security and stability issues become more and more complex, and the hazards of natural and social factors attacking the power grid continue to increase. How to avoid grid collapse caused by severe faults and cascading faults is a recognized problem. How to establish a complete automatic control system for coordinated defense of the entire network is the pinnacle of the theory and practice of power grid security control in the world today. [0003] At present, the power system safety and stability control system can be divided into three categories: local stability control system, regional power grid stability control system and regional interconne...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to address the deficiencies of the prior art and propose a closed-loop adaptive emergency control method of "centralized coordination and layered control" for large power grids to solve the problem of local N-2 and two stations in different places in the same power transmission direction in large power grids Transient stability problems caused by N-1 faults, and overload thermal stability problems of related equipment caused by tripping of lines N-2 and above in large power grids

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