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A kind of transformer hot spot temperature measurement system and method

A measurement method and technology of hot spot temperature, applied in transformer testing, thermometers based on physical/chemical changes, temperature maps, etc. Improved maintenance efficiency and operational reliability, high sensitivity and wide temperature measurement range

Active Publication Date: 2022-08-02
SHANDONG UNIV +1
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  • Summary
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  • Description
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  • Application Information

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Problems solved by technology

[0005] In order to solve the above problems, this disclosure proposes a transformer hot spot temperature measurement system and method, which uses ultrasonic waves to measure the transformer hot spot temperature in real time, which solves the problem that the existing method is easily affected by the external environment, has a short service life, and cannot correctly measure the internal temperature of the transformer.

Method used

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  • A kind of transformer hot spot temperature measurement system and method
  • A kind of transformer hot spot temperature measurement system and method
  • A kind of transformer hot spot temperature measurement system and method

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Embodiment 1

[0026] Ultrasonic temperature measurement is a kind of acoustic temperature measurement. It adopts a non-contact temperature measurement method to measure the temperature based on the functional relationship between the propagation speed of ultrasonic waves in solid, liquid, gas and other media and the temperature of the medium. In an ideal gas, the propagation velocity of ultrasonic waves is proportional to the square root of the temperature of the medium; in most liquids, the propagation velocity of ultrasonic waves is linearly related to temperature; in general solids, the propagation velocity of ultrasonic waves decreases with increasing temperature. The speed of propagation in the medium can measure the temperature of the medium.

[0027] The method of ultrasonic real-time measurement of the hot spot temperature of transformer windings proposed in the present disclosure involves placing an appropriate number of ultrasonic sensors on the outer wall of the transformer, and t...

Embodiment 2

[0034] Based on the above measurement system, the present embodiment provides a method for measuring the hot spot temperature of a transformer. The method can be implemented in a processor in the measurement system, and includes the following steps:

[0035] Step 1. Transmit an ultrasonic signal, and obtain the ultrasonic signal received by the ultrasonic sensor arranged on the outer wall of the transformer tank to be tested, that is, to obtain the ultrasonic signal passing through the inside of the transformer

[0036] Step 2. Identify the ultrasonic signal whose waveform changes in the acquired ultrasonic signal;

[0037] Step 3: Identify the propagation path of the ultrasonic signal whose ultrasonic waveform changes according to the set position of the ultrasonic sensor, and determine that the superimposed area in the propagation path is a hot spot area;

[0038] Step 4. According to the position of the hot spot and the ultrasonic signal passing through, the hot spot soluti...

Embodiment 3

[0090] This embodiment provides an electronic device, including a memory, a processor, and computer instructions stored in the memory and executed on the processor. When the computer instructions are executed by the processor, the steps described in the method of Embodiment 2 are completed.

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Abstract

The present disclosure provides a transformer hot spot temperature measurement system and method. The measurement system includes a processor, an oscilloscope and a plurality of ultrasonic sensors. The ultrasonic sensors are relatively arranged on the outer wall of a transformer oil tank. The ultrasonic sensor is electrically connected to an oscilloscope. The oscilloscope It is electrically connected with the processor; the ultrasonic sensor receives the signal emitted by the oppositely arranged ultrasonic sensor and transmits it to the oscilloscope. Using ultrasonic to measure the hot spot temperature of the transformer in real time solves the problems that the existing method is easily affected by the external environment, has a short service life, and cannot measure the internal temperature of the transformer correctly.

Description

technical field [0001] The present disclosure relates to the related technical field of transformers, and in particular, to a system and method for measuring hot spot temperature of transformers. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and do not necessarily constitute prior art. [0003] For the power system, the power transformer is one of its key equipment, and its reliability is directly related to whether the power system can operate efficiently, safely and economically. The main reason for the end of life of most power transformers is that the winding temperature is too high, causing it to lose its proper insulation capacity. Therefore, how to automatically monitor the winding temperature of power transformers is one of the key research topics in the country today. [0004] The inventor found that, according to the existing research, the calculation model given by the standar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01K11/24G01K1/14
CPCG01K11/24G01K1/14G01K2213/00G01R31/62G01K13/00
Inventor 何东欣臧庆经冯新岩李清泉刘晗巩文洁
Owner SHANDONG UNIV
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