System and method for power examination test of large-power rectifier

Abstract

The invention discloses a system and a method for a power examination test of a large-power rectifier. The system comprises an electric network source, a voltage regulator, a high-voltage low current testing device, and a low-voltage heavy current testing device. The high-voltage low current testing device includes a first transformer, a rectifier, and an impedance load. And the low-voltage heavycurrent testing device consists of a second transformer, a rectifier, and a diverter load. The electric network source is connected with the voltage regulator; an output terminal of the voltage regulator is selectably connected with a first transformer or a second transformer; alternating current input terminals of the rectifiers are selectably connected with an output terminal of the first transformers or the second transformers; and direct current output terminals of the rectifiers are selectably connected with the impedance load or the diverter load. The method comprises two steps: a high-voltage low current test and a low-voltage heavy current test. According to the system and the method in the invention, a working characteristic examination requirement of a large-power rectifier is met; the testing quality is ensured; efficiency is improved; operation steps are simplified; equipment costs are saved; and an operation potential safety hazard is reduced.

Description

technical field [0001] The invention relates to a converter testing system and a method thereof, in particular to a system and a method applied to a factory power assessment test of a high-power rectifier. Background technique [0002] With the rapid development of my country's converter technology, the application of high-power rectification technology in the fields of high-voltage DC transmission, industrial frequency converter (rectification link), DC motor control and other fields has become more and more popular; its power is also increasing, At present, megawatt-class rectifiers are very common in the industry. The working principle of the high-power rectifier is to use the one-way passing characteristics of silicon components (including thyristors, diodes, GTO, IGBT and other power electronic devices) to turn single-phase or three-phase sinusoidal alternating current (AC) current through rectifying silicon components into a stable unidirectional direct current (DC) cu...

AI Technical Summary

Problems solved by technology

[0028] The purpose of the present invention is to provide a high-power rectifier power assessment test system and its method, the system and its method can overcome the technical problems of the prior art test system and its method, such as high cost, complicated maintenance, hidden safety hazards, etc. It fully meets the working characteristics and assessment requirements of high-power rectifiers, ensures test quality, improves test efficiency, saves equipment investment costs, reduces test safety hazards, and realizes energy saving and emission reduction

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