AC test device for transformer on-load tap-changer operating characteristic

Abstract

The invention relates to an AC test device for operation characteristics of transformer on-load tap changer switch, which belongs to a test device. A power supply switch is connected with an internal power module; the internal power module and an external power interface are respectively connected with a control switch; the control switch is connected with a tested interface of the on-load tap changer; the tested interface of the on-load tap changer is connected with a voltage and current sensor; the voltage and current sensor is connected with an acquisition board; the acquisition board is connected with a master processor; the master processor is connected with a printer, a memorizer and a displayer. The device has the advantages that the applicable scope is wide; the operation characteristics of a single-phase transformer and an electric reactor tap changer are tested; an indirect tap changer test mode is provided for some special transformers, such as a rectiformer; the transformer tap changer works under the AC working condition as the test by AC method is closest to the actual operating condition.

Description

technical field [0001] The invention belongs to a transformer high-voltage test device. Background technique [0002] In order to provide electric power users with qualified voltage quality electric energy, my country began to use on-load tap changer transformers in the power grid since the late 1980s. By the end of 2004, on-load tap-changing transformers in the national power supply network accounted for more than 60% of the total number of transformers, and rural power grids also began to use on-load tap-changing transformers, followed by accidents caused by transformer on-load tap changers. No. 3 transformer accident. These accidents caused the main equipment of the power grid - the transformer to burn out. The transformer on-load tap-changer burning accident caused serious damage to the transformer, high repair costs, and long accident handling time, which seriously affected the reliability of power supply. It was listed as one of the key contents of the power system t...

AI Technical Summary

Problems solved by technology

[0011] The invention provides an AC test device for the action characteristics of transformer on-load tap-changers, to solve the non-uniqueness of the analysis of the DC test waveform of the transformer on-load tap-changer, and to conduct the DC test waveform of the transformer on-load tap-changer with windings and without windings. The waveform obtained by the test deviates greatly, and the DC tester of some standard wiring methods cannot test the problem

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