Loop closing management and control method and device for alternating-current and direct-current hybrid operation power grid

Abstract

The embodiment of the invention discloses a loop closing management and control method and device for an alternating-current and direct-current hybrid operation power grid. The loop closing managementand control method for the alternating-current and direct-current hybrid operation power grid comprises the steps of obtaining a wiring diagram and line data of the power grid; determining a loop closing current constraint condition, a loop closing power constraint condition and a power flow equation of each node of the line where the target loop closing point is located according to the wiring diagram and the line data of the power grid; taking the loop closing current constraint condition, the loop closing power constraint condition and the power flow equation as a loop closing current constraint model; based on the loop closing current constraint model, determining the sizes of loop closing boundary parameters in different simulated loop closing states; and determining a management andcontrol strategy of safe loop closing according to the size of the loop closing boundary parameter, and controlling the power grid loop closing operation based on the management and control strategy.According to the loop closing management and control method and device for the alternating-current and direct-current hybrid operation power grid provided by the embodiment of the invention, the safety and reliability of loop closing operation can be ensured.

Description

technical field [0001] Embodiments of the present invention relate to power grid loop closure technology, and in particular to a loop closure management and control method and device for an AC-DC hybrid operation grid. Background technique [0002] In the power system, when the equipment needs to be repaired or the line fails, in order to ensure the continuity of the power supply, the power grid is usually closed to ensure the normal power supply of the non-maintenance section or the non-fault section. The loop closing operation can realize switching without power failure, which can greatly reduce the number of power outages and power outage time of users. Therefore, the loop closing operation of the power grid is performed during line maintenance or failure to ensure continuous power supply of the power grid. [0003] At present, the existing closed-loop management and control methods of the AC-DC hybrid operation grid usually perform the loop-closed operation when the phas...

AI Technical Summary

Problems solved by technology

[0003] At present, the existing closed-loop management and control methods of the AC-DC hybrid operation grid usually perform the loop-closed operation when the phase sequence and phase of the voltage on both sides of the closed-loop point are checked. Due to the large number of voltage levels in the power grid, if only the phase and phase sequence are checked, the power flow may be detoured, resulting in equipment overload or tripping, which seriously threatens the safe operation of the power grid

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