Device and method for fast switching of DC power supply

Abstract

The invention provides a direct-current power source rapid switching device and method, and relates to a direct-current power source rapid switching system and method. The direct-current power source rapid switching device comprises a synchronous acquisition unit (1), a logic control unit (2), a data management unit (3) and direct-current switches (4). The synchronous acquisition unit (1) is used for carrying out signal conversion on voltage and current of direct-current power sources, synchronously acquiring signals, summarizing acquired data and then placing the data to a data bus so that the logic control unit (2) can read the data; the logic control unit (2) is used for receiving the data summarized by the synchronous acquisition unit, carrying out operation and controlling motions of the direct-current switches (4); the data management unit (3) is in communication with the logic control unit (2) through a network interface, and carries out real-time monitoring on voltage signals and input signals of two direct-current feeder lines; the direct-current switches (4) execute trip instructions and closing instructions to carry out switching between a working power source and a standby power source, wherein the trip instructions and the closing instructions are sent by the logic control unit (2). The direct-current power source rapid switching device and method have the advantages of being high in switching speed and high in reliability.

Description

technical field [0001] The invention relates to a power system monitoring and switching device and method, in particular to a fast switching system and method for a DC power supply. Background technique [0002] At present, in the protection cells with a voltage level above 220KV of the State Grid, each set of protection has two DC power supplies, but the switching of the two DC power supplies adopts a manual series switching method. After the switching is completed, a mechanical chain is used to lock the non-power supply circuit. During the DC switching process, the protection and measurement and control devices in the small room must be powered off, and can only be powered on after the switching process is completed. The power supply reliability of secondary equipment is improved. In addition, there are still many problems in the power switching screen that the DC switching switch can only be manually operated locally, and cannot be operated remotely, and the voltage, cur...

AI Technical Summary

Problems solved by technology

[0002] At present, in the protection cells with a voltage level above 220KV of the State Grid, each set of protection has two DC power supplies, but the switching of the two DC power supplies adopts a manual series switching method. After the switching is completed, a mechanical chain is used to lock the non-power supply circuit. During the DC switching process, the protection and measurement and control devices in the small room must be powered off, and can only be powered on after the switching process is completed. Reliability of power supply for secondary equipment

In addition, there are still many problems in the power switching screen that the DC switching switch can only be operated manually on the spot, not remotely, and the voltage, current, and working position of the DC bus and DC power supply cannot be uploaded, etc.

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