A New Line Temperature Transmitting Device

A new type of line temperature technology, applied in the direction of measuring devices, thermometers, thermometer parts, etc., can solve the problems of no relevant research, secondary circuit not open circuit, etc., achieve good stability, ensure stability, and reduce failure consequences Effect

Active Publication Date: 2019-12-20
GUANGZHOU BUREAU CSG EHV POWER TRANSMISSION +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is no relevant research on preventing the heating element or current matching resistor from blowing and protecting the CT secondary circuit from opening.

Method used

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  • A New Line Temperature Transmitting Device
  • A New Line Temperature Transmitting Device
  • A New Line Temperature Transmitting Device

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Embodiment Construction

[0021] The present invention will be further described below in combination with specific embodiments.

[0022] Such as figure 2 , a new type of line temperature transmission device, used for drawing the current of the CT secondary winding to the heating resistor circuit when measuring the line temperature of the power transformer, the new line temperature transmission device includes a current for collecting the current data of the CT secondary winding Acquisition module 1, control circuit and AC constant current source circuit 3, wherein the control circuit includes central processing for processing the current data output by the current acquisition module 1 and controlling and adjusting the input current of the AC constant current source circuit through the serial port communication circuit device 2 and liquid crystal display module 4, the central processing unit 2 is connected with the liquid crystal display module 4, and the central processing unit 2 transmits the curren...

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Abstract

The present invention discloses a novel line temperature transmission device used for leading the current of the secondary winding of a CT (current transformer) to a heating resistor loop in line temperature measurement of the power transformer. The device includes a current acquisition module for acquiring the current of the secondary winding of the CT, a control circuit and an alternating-current constant current source circuit for leading output current to the heating resistor loop; the control circuit comprises a central processing unit and a liquid crystal display module; the alternating-current constant current source circuit is connected with the central processing unit through a serial communication circuit; the current acquisition module is connected with the central processing unit; and the liquid crystal display module is connected with the central processing unit. According to the novel line temperature transmission device of the invention, a current acquisition sensor is adopted to acquire the current of the secondary winding; the central processing unit processes acquired current data and communicates with the alternating-current constant current source circuit so as to control the magnitude of output current, so that the output current of the alternating-current constant current source circuit and acquired input current can be synchronous and consistent, and therefore, the risk of the open circuiting of the secondary winding of the CT can be lowered, and the stability of a transformer system can be improved.

Description

technical field [0001] The invention relates to a line temperature transmission device, in particular to a line temperature transmission device for measuring the temperature of a secondary winding current during line temperature measurement of a power transformer. Background technique [0002] At present, the method of measuring the line temperature of the power transformer is mainly that the current of the secondary winding of the CT flows through the heating resistor to compensate the oil temperature, and the line temperature of the transformer is obtained after conversion. Since this measurement method connects resistors in series in the CT secondary winding circuit, and the environment around the converter transformer is relatively harsh, there is a risk of resistor burnout in long-term operation, causing the CT secondary winding to open and threatening the safety of the transformer. run. At present, the temperature measurement principle of the winding at home and abroa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01K1/00
CPCG01K1/00
Inventor 李乾坤黄辉万航宇曾文龙赵杰王亮张志浩马叔阳谢超郭卫明
Owner GUANGZHOU BUREAU CSG EHV POWER TRANSMISSION
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