A method for obtaining svg secondary electricity

Abstract

The invention discloses a SVG secondary power acquisition method. The external 380V power supply is led to the connection terminal of the control cabinet, connected to the input of the UPS through a single-phase circuit breaker, and the output of the UPS is connected to the 220V incoming line of the control box. terminal. At the same time, the output of the UPS is led to the wiring terminals of each power unit through a contactor; and then led to the power supply terminals of the module control board through the isolation transformer. The present invention provides stable 220V control power to the control box through the UPS, has the dual functions of isolation and filtering, and improves the anti-interference ability of power supply; the module power supply provides 220V power supply to the power unit through the isolation transformer and the module control board, and realizes the isolation of high and low voltage , At the same time, the module control board is designed with the function of power failure protection, which has the advantage of reliable power supply.

Description

technical field [0001] The invention belongs to the field of electronics, relates to a technical link in a high-voltage static var generator (SVG), and relates to a method for obtaining secondary power of an SVG. Stabilizes a new technique that prevents SVG from functioning properly. Background technique [0002] SVG usually works in environments with poor power quality such as electric arc furnaces, rolling mills, hoists, wind power plants or electrified railways. It is worth noting that the environment has high harmonic content and large voltage fluctuations, which often interfere with the secondary power of SVG. make it inoperable. Some technologies provide secondary power to SVG through a high-voltage energy-taking board, but this method requires the design of a complex secondary circuit board, and the secondary circuit board has a limited working life and is prone to failure. In order to solve the problem of unreliable secondary power supply, a secondary power acquisi...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art, and provide a method for obtaining secondary power of SVG, which supplies power to the control box through UPS, and supplies power to the power unit through the isolation transformer and module control board, so as to solve the problem of the secondary power supply of SVG. Reliable problem, simple implementation, reliable work, long life

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