Electric power low-voltage DC redundant power supply system

Abstract

The invention provides an electric power low-voltage direct-current redundant power supply system. The electric power low-voltage direct-current redundant power supply system comprises a rectifying circuit, a filtering circuit, an overvoltage switching circuit, a voltage stabilizing circuit, a lithium battery unit and a detection switching circuit; the input end of the rectifying circuit is connected with a mains supply; the output end of the rectifying circuit is connected with the input end of the filtering circuit; the output end of the filtering circuit is connected with the input end of the overvoltage switch circuit; the output end of the overvoltage switching circuit is connected with the first input end of the voltage stabilizing circuit; the detection input end of the detection switching circuit is connected with the output end of the overvoltage switching circuit; the power supply input end of the detection switching circuit is connected to the lithium battery unit; the powersupply output end of the detection switching circuit is connected to the second input end of the voltage stabilizing circuit; and the voltage stabilizing circuit supplies power for a load. Accordingto the system of the invention, stable working power can be continuously provided for power detection equipment when the mains supply is powered off or power-off protection is executed during the overvoltage of the mains supply, so that the working stability of the power detection equipment is ensured, and the stability of a whole power grid is further ensured.

Description

technical field [0001] The invention relates to an electric power supply system, in particular to an electric low-voltage DC redundant power supply system. Background technique [0002] During the operation of the power grid, various detection and monitoring equipment are used to detect the state parameters of various substation equipment and transmission equipment in the power grid, and then perform corresponding operation and maintenance according to the detection parameters, so as to ensure the smooth operation of the power grid Stability, therefore, the working stability of the detection equipment of the power system is one of the key factors for the stability of the power grid. [0003] In addition to its own attributes, the stability of the testing equipment of the power system is also closely related to the stability of its power supply system. The testing equipment of the power system generally uses low-voltage direct current. 220V alternating current) is supplied t...

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Problems solved by technology

[0003] In addition to its own attributes, the stability of the testing equipment of the power system is also closely related to the stability of its power supply system. The testing equipment of the power system generally uses low-voltage direct current. 220V AC) is supplied to electrical equipment after rectification, filtering, and step-down processing. However, the mains power also has unstable factors, such as power failure, overvoltage, etc., which will affect the power detection equipment.

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