Method for quickly measuring transformer thermometer environment temperature influence quantity

A technology of ambient temperature and measurement methods, applied in thermometer testing/calibration, thermometers, measuring devices, etc., can solve the problem that thermometers do not have fast and effective rapid measurement methods and devices, and achieve the effect of portability

Active Publication Date: 2015-01-28
SHANGHAI MUNICIPAL ELECTRIC POWER CO +1
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AI Technical Summary

Problems solved by technology

[0003] At present, the verification of the ambient temperature influence quantity of the transformer thermometer can only be carried out in

Method used

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  • Method for quickly measuring transformer thermometer environment temperature influence quantity

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Embodiment 1

[0035] The specific measurement process is: the length of the capillary of the thermometer is 6 meters, the measuring range of the thermometer is 100 ℃, and the measurement preparation is carried out according to the above measurement method at an ambient temperature of 25 ℃. The heating area of ​​the capillary is 0.5 m in length. At the same time, read the thermometer value and torque value. If the reading temperature is 25.0℃, the torque is 0.43N·m;

[0036] Set the temperature of the temperature control device and stably increase the temperature to the set value of 55°C. After stabilization, read the thermometer value and torque value. For example, the temperature is 25.2°C and the torque is 0.45N·m;

[0037] The calculation is as follows: the temperature difference of a 0.5-meter capillary is 0.2℃, and the torque difference is 0.02N·m; therefore, when the temperature of a 6-meter capillary changes by 30℃, the thermometer can produce a temperature difference of 2.4℃ and a torque ...

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Abstract

The invention relates to a method for quickly measuring the transformer thermometer environment temperature influence quantity. A test is conducted when the oil tank temperature of a transformer is stable, the environment temperature is T3, the length of a capillary tube is L1, and one end of the capillary is connected with a thermometer; a heating region with the length being L2 is taken from the capillary tube, a temperature control device is bound to the heating region, and the current temperature value T1 indicated by the thermometer pointer is read and the borne moment of force is M1; the temperature of a temperature control device is set and slowly raised to the target temperature T4; after the temperature is stable, the current temperature value T2 indicated by the thermometer pointer is read and the borne moment of force is M2; the temperature value difference of the thermometer before and after the temperature rises and the difference of the moment of force are calculated, the environment temperature influence quantity borne by the whole capillary tube is calculated according to the differences and the temperate difference delt T =(T2-T1)*L1/L2 is generated by the thermometer; the thermometer moment force change delt M = (M2-M1)*L1/L2; the environment temperature influence quantity = delt T (T4-T3)%/DEG C. Compared with the prior art, the method is easy to implement, capable of being implemented at field, and visual and accurate in result.

Description

Technical field [0001] The invention relates to a method for measuring the influence of environmental temperature, in particular to a method for quickly measuring the influence of environmental temperature of a transformer thermometer. Background technique [0002] The influence of ambient temperature is the direct factor that causes the on-site transformer thermometer to display a temperature greater than the actual temperature when the ambient temperature is high, and the display temperature is less than the actual temperature when the ambient temperature is low. The measurement of the ambient temperature influence of the transformer thermometer is also a routine inspection and type of transformer thermometers Key items of the experiment. At the same time, for the measurement of transformer temperature, oil surface temperature and winding hot spot temperature, the environmental temperature influence of the thermometer is directly related to the accurate measurement of temperatu...

Claims

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Application Information

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IPC IPC(8): G01K15/00
Inventor 芮颖袁志文
Owner SHANGHAI MUNICIPAL ELECTRIC POWER CO
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