Early warning method and system based on stable temperature rise
A technology of temperature rise and stability, applied to the parts of thermometers, thermometers, instruments, etc., can solve the problems of inability to early warning, complex and changeable, and temperature monitoring that cannot realize early warning, so as to achieve the effect of early warning and early prediction
Pending Publication Date: 2022-04-15
STATE GRID ELECTRIC POWER RES INST +3
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Problems solved by technology
[0003] At present, the real-time temperature online measurement technology of the online temperature measurement device is relatively mature, and the temperature rise data of the conductive parts can be obtained in real time and reliably. When the equipment fails, the temperature rise exceeds the standard limit, and the fault alarm is repaired, but it is still a fault. Maintenance after the fact, no early warning
[0004] One of the reasons is that in actual engineering, the actual working conditions of the switchgear running online are complex and changeable, and the size, time and fluctuation of its working current depend entirely on the load. Usually, the working current is much lower than the rated current. At this time Even if the equipment has a resistance failure, its temperature rise does not exceed the standard limit, so temperature monitoring alone cannot achieve early warning
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[0042] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.
[0043] Such as figure 1 As shown, an early warning method based on stable temperature rise includes the following steps:
[0044] Step 1, obtain the current of the conductive part of the equipment under test;
[0045] Step 2, predict the stable temperature rise of the conductive part of the device under test according to the current of the conductive part of the device under test and the pre-built stable temperature rise prediction model; wherein, the relationship between current and stable temperature rise is defined in the stable temperature rise prediction model;
[0046] Step 3: Carry out early warning and judgment according to the predicted stable temperature rise of the conductive parts ...
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The invention discloses an early warning method and system based on stable temperature rise, and the method comprises the steps: predicting the stable temperature rise of a conductive part of to-be-detected equipment according to the current of the conductive part of the to-be-detected equipment, and carrying out the early warning judgment according to the predicted stable temperature rise of the conductive part of the to-be-detected equipment and the actually measured stable temperature rise, thereby effectively achieving the early warning. And fault hidden dangers of conductive parts can be predicted in advance.
Description
technical field [0001] The invention relates to an early warning method and system based on stable temperature rise, and belongs to the technical field of online temperature monitoring and prediction of high-voltage electrical equipment. Background technique [0002] During the long-term operation of high-voltage switchgear, conductive parts will generate heat due to aging, surface oxidation and corrosion, loose connection, loose fastening bolts or excessive contact resistance, which will seriously affect the safe operation of equipment and power grids. Therefore, manufacturers hope that by installing online temperature measuring devices on conductive parts and monitoring real-time temperature change state parameters, they can predict equipment failure trends and prevent failures in advance to maintain normal and reliable operation of equipment. [0003] At present, the real-time temperature online measurement technology of the online temperature measurement device is relati...
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IPC IPC(8): G01K1/02
Inventor 韩冬吴夕科张冰陆德鹏宗清森李传强黄靖田川
Owner STATE GRID ELECTRIC POWER RES INST