Transformer temperature rise measuring device and method

Abstract

The invention relates to the technical field of transformer winding temperature rise resistance measurement, in particular to a transformer temperature rise measuring device and method. The transformer temperature rise measuring device comprises a power supply, a switch, a resistance meter and a data operation device electrically connected with the resistance meter. The transformer temperature rise measuring method comprises the following steps: measurement is conducted through the resistance meter at a normal temperature, a resistance value of a transformer is read, and an initial temperature value is input; 10-30 resistance values of the transformer are obtained through continuous measurement of the resistance meter, and a temperature rise value is obtained through backward induction by means of a tendency chart function formula of an Excel program chart and calculation by means of the formula. According to the transformer temperature rise measuring device and method, multiple data sets are read, the backward induction method is utilized, the result is analyzed through software, the function formula is deduced three times, the truth value of a final temperature rise resistance value at the disconnection moment is obtained, the truth value is introduced into the formula, and the temperature rise value is calculated, so that measurement accuracy is higher, and measurement efficacy is higher.

Description

technical field [0001] The invention relates to the technical field of transformer winding temperature rise resistance measurement, in particular to a transformer temperature rise measurement device and a measurement method thereof. Background technique [0002] The temperature rise of electronic components will not only affect the performance of the components themselves, but also affect the safety of electricity use. For this reason, both GB4706.1 and IEC60335-1 safety regulations for household and similar electrical appliances stipulate the heating requirements for electronic components. [0003] At present, there are two main methods for testing the temperature rise of winding devices, the first is the thermocouple method; the second is the resistance method. In the process of testing using the thermocouple method, the test results are different if the test points are different, and the test results are very different, and it is not suitable for windings with encapsulat...

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Problems solved by technology

[0006] At present, the test intensity of manual measurement is high, the safety is low, the test efficiency is low, and there is a certain delay in the measurement process. It takes a long time to measure the resistance value of the first point, which is easy to affect the measurement accuracy and cause the test to fail.

[0007] In addition, the structure of the existing winding temperature rise test device is often too complicated and difficult to realize, and the calculation steps in it are relatively cumbersome. Usually, it is necessary to draw a chart after manual measurement and calculate the temperature rise value of the voltage transformer winding. The measurement error is relatively large. Seriously affect its measurement efficiency, obvious defects

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