On-line control method of large electric network consecutive fault and remote place linkage fault

Abstract

The present invention provides a method for on-line controlling the successive failure of a large electric network and chain failure of different location. The system of the invention comprises a dispatching central station, a main control station, a control substation and a control actuating station. The dispatching central station on-line calculates the control strategy and transmits to the main control station. The main control station takes charge of the determination to the failure of different location and the coordination of the control strategies. The control substation takes charge of the determination and control of the local failure. The control actuating station takes charge of the actuating of the control strategy. The control substation and the control actuating station execute the area control. The main control station executes the control to the failure of different location and coordination of the insufficiency of the area control quantity. The dispatching central station takes charge of the calculation of the on-line control strategy and the coordination of the control strategies between different main control stations. The invention adopts an on-line control framework of ''centralized coordination and layered control''. The determination and control coordination of the successive failure and chain failure of different location are effectively realized. The on-line control to the successive failure of large electric network and chain failure of different locations are realized.

Description

Technical field [0001] The invention relates to an online control method for successive failures and remote cascading failures of large power grids, and belongs to the technical field of power systems. Background technique [0002] The safety and stability problems caused by successive failures of large power grids and remote cascading failures are not a simple accumulation of safety and stability problems caused by single component failures, and their actual consequences are often more serious than the cumulative effects of single component failures. Such as figure 1 As shown, it is a schematic diagram of the issuance and execution flow of the existing traditional online control strategy. The existing safety and stability control devices, whether the device adopts an offline strategy table or an online strategy table, mainly solve the problem of static or transient safety and stability caused by a local N-1 fault. Therefore, the use of existing safety and stability control devi...

AI Technical Summary

Problems solved by technology

With the strengthening of power grid connections, regional power grid problems are gradually covered by larger power grid problems. The regional safety and stability control system that only relies on local single component fault judgment and decision-making is far from meeting the requirements of safe and stable operation of large power grids. It is imminent to study the on-line control method of successive faults in large power grids and remote cascading faults

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