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Direct current resistance testing device and method of intelligent transformer

A technology of DC resistance testing and testing methods, which is applied in measuring devices, electrical winding testing, measuring resistance/reactance/impedance, etc., can solve the problems of cumbersome test wiring, etc., achieve stable and reliable measurement accuracy, avoid data deviation, and wide measurement range Effect

Inactive Publication Date: 2019-03-19
FUSHUN POWER SUPPLY COMPANY OF STATE GRID LIAONING ELECTRIC POWER SUPPLY +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention aims at the problems existing in the above-mentioned prior art, and provides an intelligent transformer DC resistance testing device, which solves the problem of cumbersome test wiring in the prior art

Method used

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  • Direct current resistance testing device and method of intelligent transformer
  • Direct current resistance testing device and method of intelligent transformer
  • Direct current resistance testing device and method of intelligent transformer

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Embodiment Construction

[0023] An intelligent transformer DC resistance testing device, which consists of a chassis carrier and an inner core placed in the chassis carrier, such as figure 1 As shown, the inner core includes a central processing unit and a constant current source circuit connected to the central processing unit, a signal acquisition module, a measurement protection module, a relay switching unit and a man-machine interface module; the constant current source circuit includes three The phase constant current source generation controller, the signal acquisition module includes a current signal acquisition circuit and a voltage signal acquisition circuit, and the relay switching unit switches between conventional measurement and one-key measurement according to the control requirements; the man-machine interface module includes a key operation module, Liquid crystal display module, data printing module and data storage module.

[0024] like figure 2 As shown, before the test, connect t...

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Abstract

The invention relates to a direct current resistance testing device and method of an intelligent transformer. The device is composed of a machine box carrier and an inner core which is arranged in themachine box carrier, and the inner core comprises a central processing unit and a constant current source circuit, a signal collecting module, a measuring protecting module, a relay switching unit and a human-computer interface module which are connected with the central processing unit; the constant current source circuit comprises a three-phase constant current source generating controller, thesignal collecting module comprises a current signal collecting circuit and a voltage signal collecting circuit, and conventional measuring and one-button measuring are switched by the relay switchingunit according to a control demand. When testing is conducted, a testing method is selected on a device side according to the linking manner of a tested winding group, the measuring of all winding groups of primary and secondary winding groups is completed in one attempt, the working efficiency is improved, and the potential safety hazards of the falling of wires caused by climbing height are greatly reduced.

Description

technical field [0001] The invention relates to an intelligent transformer DC resistance test device and a test method, which are applied to the DC resistance test of main transformer equipment in substations of 66kV and above in a power system, and belong to the field of electric power applications. Background technique [0002] The DC resistance test of the transformer is a necessary test item for the transformer handover test and preventive test, which can effectively find the defects of the transformer winding and the hidden dangers after operation. Due to the various connection methods of transformer windings (DY, YY, YD, etc.), the current domestic on-site testing methods for DC resistance of transformers are mostly based on the connection methods of windings, and different test methods are selected. During the test, it is necessary to change the wiring of the test line to Adapting to the connection mode of different windings brings a lot of inconvenience to the test o...

Claims

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Application Information

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IPC IPC(8): G01R27/08G01R31/06G01R29/16
CPCG01R27/08G01R29/16G01R31/72
Inventor 石峰岳程城马新裴玉杰白佳天董子钰徐建国许鸿斌张福峰郭杰张佳岩蒋鹏陈晶阳岳子尧乔博宇宋沅林张文广张华田智丽苏旸李一然南洋郭俊平
Owner FUSHUN POWER SUPPLY COMPANY OF STATE GRID LIAONING ELECTRIC POWER SUPPLY
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