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Intelligent device for measuring dielectric loss factor and insulation resistance of power transformer

A technology of insulation resistance measurement and dielectric loss factor, which is applied in the directions of measuring devices, measuring electrical variables, measuring resistance/reactance/impedance, etc., can solve problems such as measurement error safety hazards, reduce work intensity, improve work efficiency, reduce The effect of measurement error

Inactive Publication Date: 2014-07-23
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is not difficult to see that measuring the insulation resistance of transformers also requires multiple disconnections, and there are also measurement errors and hidden dangers in safety caused by this.

Method used

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  • Intelligent device for measuring dielectric loss factor and insulation resistance of power transformer
  • Intelligent device for measuring dielectric loss factor and insulation resistance of power transformer
  • Intelligent device for measuring dielectric loss factor and insulation resistance of power transformer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Depend on Figure 1-2 It can be seen from the illustrated embodiment that this embodiment includes a host computer U1, an insulation resistance measurement module U2, a dielectric loss measurement reverse connection module U3, a dielectric loss measurement positive connection module group, a switch J, a high-voltage relay group and a low-voltage relay group;

[0036]The three-phase windings on the same voltage side of the power transformer are short-circuited to the corresponding ports of the insulation resistance measurement module U2 and the dielectric loss measurement reverse connection module U3 respectively through the high-voltage relay group and the switch J in turn; the power transformer winding bushing The lead-out line of the last screen is connected to the corresponding port of the direct connection module group of the dielectric loss measurement through the low-voltage relay group; the power supply terminals of the insulation resistance measurement module U2 ...

Embodiment 2

[0070] Depend on figure 1 , image 3 It can be known from the illustrated embodiment that this embodiment includes a host computer U1, an insulation resistance measurement module U2, a dielectric loss measurement reverse connection module U3, a dielectric loss measurement positive connection module group, a switch J, a high-voltage relay group, a low-voltage relay group and a high-voltage power supply Interface ACT;

[0071] The three-phase windings on the same voltage side of the power transformer are short-circuited to the corresponding ports of the insulation resistance measurement module U2 and the dielectric loss measurement reverse connection module U3 respectively through the high-voltage relay group and the switch J in turn; the power transformer winding bushing The lead-out line of the last screen is connected to the corresponding port of the direct connection module group of the dielectric loss measurement through the low-voltage relay; Connect the high-voltage...

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Abstract

The invention relates to an intelligent device for measuring the dielectric loss factor and the insulation resistance of a power transformer. The intelligent device comprises an upper computer U1, an insulation resistance measuring module U2, a dielectric loss measuring reverse connection module U3, a dielectric loss measuring positive connection module set, a diverter switch J, a high-voltage relay set and a low-voltage relay set. The intelligent device has the following advantages that as long as connection lines are well connected at the beginning of a test, in the whole test process, the upper computer is used for controlling high-voltage relays, low-voltage relays and the diverter switch to select a winding state and a measurement project so as to replace manual line connecting, the winding state is automatically switched in the whole measurement process, manual intervention is not needed, measurement errors can be reduced, the working intensity can also be relieved, the working efficiency is improved, and intelligent measurement of the dielectric loss factor and the insulation resistance of the power transformer is achieved.

Description

technical field [0001] The invention belongs to the technical field of power equipment measurement, and relates to an intelligent power transformer dielectric loss factor and insulation resistance measuring device. Background technique [0002] The power transformer is the main equipment of the power system, which is of great significance to the safe and reliable operation of the power grid. Testing the insulation state of the power transformer is an important measure to ensure its safe operation. The test practice shows that the measurement of the dielectric loss factor and insulation resistance of the power transformer is an effective means to judge the insulation state of the power transformer, and it is the main item of the handover and preventive test of the power transformer. The dielectric loss factor is mainly used to check the state of the transformer due to dampness, oil quality deterioration, oil sludge attached to the winding and serious local defects, etc.; the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R27/26G01R27/02
Inventor 高树国陈志勇范辉潘瑾贾伯岩岳啸鸣刘宏亮赵军
Owner STATE GRID CORP OF CHINA
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