Method of on line prealarming when temperature of plug in switch cabinet is abnormal

A switchgear, abnormal technology, applied in the direction of switchgear components, etc., can solve the problems of heavy workload, difficult maintenance and repair, and large increase in equipment cost, so as to reduce labor intensity, improve accuracy and reliability, and equipment The effect of low cost

Inactive Publication Date: 2003-09-17
XIAN SENYUAN DISTRIBUTION AUTOMATION APP
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although these methods can achieve a certain degree of early warning, they all have inherent shortcomings: the manual inspection method has a large workload, and it is impossible to obtain the required data for parts that are invisible or cannot be directly measured. The data needs to be recorded manually, and it is not easy to analyze and judge the data; the method of optical fiber online temperature measurement needs to arrange a large number of sensors, which will increase the equipment cost greatly, and the signal of the sensor must be connected with the primary circuit through the optical fiber. The contact connection artificially increases the possibility of insulation failure, and once a sensor fails, it is difficult to maintain and repair the equipment in the online state

Method used

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  • Method of on line prealarming when temperature of plug in switch cabinet is abnormal

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Experimental program
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Effect test

Embodiment approach 1

[0008] Use a special temperature data acquisition device to automatically and circularly detect the surface temperature rise of a specified point on the outer surface of the switchgear 5 busbar room and the rear cover of the cable room, and automatically collect the corresponding values ​​of these parts during the operation of the switchgear. The temperature rise data, and then use the computer 1 to compare and analyze the collected temperature rise data and related calculation results with the basic data and original data, and draw a conclusion whether the trend and absolute value of the temperature rise data and related calculation results are normal. , to issue early warnings for abnormal values ​​and abnormal changes in temperature rise data and related calculation results. The abnormal phenomenon of temperature rise is that under the same ambient temperature conditions, there will be a certain correspondence between the three-phase current value in the busbar room or the c...

Embodiment approach 2

[0013] t n is the ambient temperature value during inspection. Embodiment 2, using a special temperature data acquisition device to automatically detect the surface temperature rise of three specified points on the outer surface of the switchgear bus room and the rear cover of the cable room. The positions of these three points are respectively Corresponds to the three isolation plugs in the compartment. Automatically collect the temperature rise data corresponding to these parts during the operation of the switchgear, and then use the computer to compare and analyze the collected temperature rise data and related calculation results with the basic data and original data to obtain the temperature rise data and related calculations The trend of the result and the conclusion of whether the absolute value is normal, and an early warning for the abnormal value and abnormal change of the temperature rise data and related calculation results. The abnormal phenomenon described is t...

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Abstract

An on-line early warning method for abnormal temperature at plug contact in switch cabinet for power supply and distribution uses special temperature data collection device to carry on automatic cycle detection for surface temperature-rise value ruled and selected separately at outer surface of back cover for cable chamber and bus chamber of the switch cabinet, and the temperature-rise data correspond with there places are automatically collected in the operation course of the switch cabinet, then the collected data and related culculation result compared and analysed with basic data and original information by the computer in order to obtain the conclusion that the trend and the absolute value of the temperature vise value data and the related calculation result are normal or not, and the early warning is issued if there is an abnormal value.

Description

technical field [0001] The invention relates to an online warning method and device for abnormal plug temperature in a power supply and distribution switch cabinet, and belongs to the technical field of high-voltage electrical appliances. Background technique [0002] The abnormal temperature rise of the main circuit connection part in the switch cabinet, especially the primary isolation plug part of the handcart switch cabinet during operation is a kind of fault. In order to give early warning of these abnormal temperature rises, people have thought of many ways. At present, the commonly used measures are: paste color-changing cards on the visible parts of the branch busbars, and detect abnormal temperature rises through manual inspections; use non-contact temperature measuring devices, The inspection found that the temperature rise was abnormal; the optical fiber online temperature measurement device was used to collect the temperature information of the detection point, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02B11/02H02B11/04
Inventor 胡亮
Owner XIAN SENYUAN DISTRIBUTION AUTOMATION APP
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