Novel transformer test power supply

Abstract

The invention relates to a novel transformer test power supply which comprises a high-voltage frequency-conversion test power supply, an intermediate boosting transformer and a reactive compensation device, wherein the high-voltage frequency-conversion test power supply is connected with the intermediate boosting transformer which is connected with a tested transformer; the input end of the tested transformer is connected with the reactive compensation device; the high-voltage frequency-conversion test power supply is of a structure that power units are serially connected with a plurality of electric levels; and a basic structure of the power units is an alternating current-direct current-alternating current three-phase rectifier and single-phase inverter circuit; and three secondary side windings of a phase-shifting transformer form a group which respectively supplies power to the three power units of the same level, and a plurality of power units of each phase are connected in series together to form three-phase high-voltage power output in star-shaped connection. The novel transformer test power supply has the advantages: the high-voltage frequency-conversion test power supply is directly used as a transformer test power supply and outputs various frequencies of voltage required by a test; and the test power supply can output continuous and adjustable voltage and three-phase alternating current with the frequency adjusting range of 0-200Hz and provides a wide voltage and frequency adjusting range for the transformer test.

Description

technical field [0001] The invention relates to a novel frequency conversion test power supply for transformer test. Background technique [0002] Transformer is one of the most important electrical main equipments in the power system, and its operation status directly affects the safe and stable operation of the power system. Therefore, the transformer needs to undergo a transformer test before leaving the factory. The purpose of the transformer test is to obtain its performance data, which is used to judge whether the transformer is qualified or not. [0003] According to the provisions of "GB1094.1-1996", three tests are required for transformers: routine test, type test and special test. [0004] The traditional transformer test power supply uses the asynchronous motor to assist the start of the synchronous unit. The asynchronous machine drags the synchronous motor to near its rated speed, the asynchronous motor is de-energized, and the synchronous unit is switched to...

AI Technical Summary

Problems solved by technology

The disadvantages of the traditional transformer test power supply are: large footprint, small variable range of power output frequency; poor reliability

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