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A transformer excitation characteristic detection method and device

A technology for excitation characteristics and transformers, which is applied in measuring devices, instruments, measuring electricity, etc., can solve the problems of low feasibility of excitation characteristics detection methods, and achieve the effects of high feasibility, reduced volume and weight, and high defect recognition sensitivity.

Active Publication Date: 2021-01-19
QUJING POWER SUPPLY BUREAU YUNNAN POWER GRID CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a transformer excitation characteristic detection method and device to solve the problem of low feasibility of the existing excitation characteristic detection method for transformers operated on site in the prior art

Method used

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  • A transformer excitation characteristic detection method and device
  • A transformer excitation characteristic detection method and device
  • A transformer excitation characteristic detection method and device

Examples

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Effect test

no. 1 example

[0035] see figure 2 , figure 2 A working flowchart of the method for detecting the excitation characteristic of the transformer 200 provided by the embodiment of the present invention is shown. The excitation characteristic detection method includes the following steps:

[0036] Step S101 , controlling the variable frequency source 140 to adjust the frequency of the input signal at the high voltage side and / or adjusting the resistance value of the low voltage side by the adjustable resistor 150 to change the electrical parameters of the high voltage side and the low voltage side.

[0037] In the embodiment of the present invention, the electrical parameters may be current and voltage, and may also be power. Since both the input signal frequency of the high-voltage side and the resistance value of the low-voltage side will affect the electrical parameters, the electrical parameters of the high-voltage side and the low-voltage side can be changed by adjusting the input signa...

no. 2 example

[0076] see Figure 7 , Figure 7 A schematic block diagram of an excitation characteristic detection device 300 of a transformer 200 provided by an embodiment of the present invention is shown. The excitation characteristic detection device 300 includes an electrical parameter adjustment module 301 , a first parameter acquisition module 302 , a second parameter acquisition module 303 , a working efficiency acquisition module 304 and a generation module 305 .

[0077] The electrical parameter adjustment module 301 is used to control the variable frequency source 140 to adjust the input signal frequency of the high voltage side and / or the adjustable resistor 150 to adjust the resistance value of the low voltage side to change the electrical parameters of the high voltage side and the low voltage side.

[0078] The first parameter acquisition module 302 is configured to control the high voltage detection unit 110 to detect the electrical parameters of the high voltage side to ob...

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Abstract

The invention relates to the technical field of transformer detection, and provides a method and a device for detecting excitation characteristics of a transformer. The method comprises: controlling avariable frequency source to adjust an input signal frequency of a high-voltage side and / or controlling an adjustable resistor to adjust a resistance of a low-voltage side, so as to change electricalparameters of the high-voltage side and the low-voltage side; controlling a high-voltage detection unit to detect the electrical parameters of the high-voltage side, so as to obtain a first parameter; controlling a low-voltage detection unit to detect the electrical parameters of the low-voltage side, so as to obtain a second parameter; calculating a working efficiency of the transformer according to the first parameter and the second parameter; and generating an excitation characteristic graph according to at least one of the working efficiency, the signal input frequency of the high-voltageside and the resistance value of the low-voltage side. According to the method and the device for detecting the excitation characteristics of the transformer, the problems that the existing method and device for detecting the excitation characteristics in the prior art is heavy for the field operation transformer and the feasibility is low in field application are solved.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of transformer detection, and in particular, to a method and device for detecting excitation characteristics of a transformer. Background technique [0002] Transformer is a device that uses the principle of electromagnetic induction to change AC voltage. The main components are primary coil, secondary coil and iron core. [0003] In the existing technology, the detection method of excitation characteristics adopts the power frequency method, that is, the power frequency voltage is applied to both ends of the transformer. Transformer, the device of this method is heavy, inconvenient to move on site, low in operability, and cannot complete the detection of the excitation characteristics of the transformer on site. Contents of the invention [0004] The object of the present invention is to provide a transformer excitation characteristic detection method and device to solve the problem...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/00
CPCG01R31/00
Inventor 朱晓红杨子力
Owner QUJING POWER SUPPLY BUREAU YUNNAN POWER GRID CO LTD