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A Method for Measuring Oil Leakage Fault of Porcelain Bushing at Cable Terminal

A cable terminal and measuring cable technology, applied in the field of power cables, can solve the problems such as the oil level liquid level detection scheme of the ceramic sleeve terminal of the power cable that has not yet appeared.

Active Publication Date: 2015-11-18
GUANGZHOU POWER SUPPLY BUREAU GUANGDONG POWER GRID CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no detection scheme for the oil surface level of the power cable porcelain sleeve terminal in the market

Method used

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  • A Method for Measuring Oil Leakage Fault of Porcelain Bushing at Cable Terminal
  • A Method for Measuring Oil Leakage Fault of Porcelain Bushing at Cable Terminal

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Embodiment Construction

[0021] Embodiments of the present invention are described in detail below:

[0022] Such as figure 1 As shown, the device for measuring the oil leakage fault of the porcelain bushing 200 of the cable terminal of the present invention includes a first probe 10 , a second probe 20 , a detection wave generator and receiver 30 and a computing unit 40 . The first probe 10 and the second probe 20 are connected to the detection wave generator and receiver 30 through wires. The generator and receiver 30 generate electric pulse signals to synchronously excite the first probe 10 and the second probe 20 to make the first probe 10 and the second probe 20 generate detection waves. In this implementation, the detection wave is an ultrasonic longitudinal wave, and the first probe 10 and the second probe 20 adopt a single-shot and single-receive working mode. The first probe 10 and the second probe 20 are coupled to the outer wall of the cable terminal ceramic bushing 200 through a silica g...

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Abstract

The invention discloses a method for measuring the oil leakage fault of a cable terminal porcelain sleeve. The method for measuring the oil leakage fault of the cable terminal porcelain sleeve comprises the following steps that a first probe sends detection wave to the porcelain sleeve and receives a first reflected wave reflected between the porcelain sleeve and the interface of substance in the sleeve; a second probe sends detection wave to the porcelain sleeve and receives a second reflected wave reflected between the porcelain sleeve and the interface of substance in the sleeve; the first reflected wave and the second reflected wave are compared; when the reflectivity of the first reflected wave is equal to the reflectivity of the second reflected wave, the first probe is moved until the critical position is determined when the reflectivity of the first reflected wave is unequal to the reflectivity of the second reflected wave; when the reflectivity of the first reflected wave is unequal to the reflectivity of the second reflected wave, the first probe is moved until the critical position is determined when the reflectivity of the first reflected wave is equal to the reflectivity of the second reflected wave. The invention also provides equipment for measuring the oil leakage fault of the cable terminal porcelain sleeve.

Description

technical field [0001] The invention relates to the power cable industry, in particular to a method for measuring the oil leakage fault of a porcelain bushing at a cable terminal. Background technique [0002] High-voltage cable outdoor porcelain sleeve terminal is a terminal form commonly used in the power cable industry. The terminal porcelain sleeve is filled with liquid insulating oil. For cable terminals, the insulating oil has insulation, heat dissipation and cooling, arc extinguishing, buffering and shock absorption, etc. effect. When the height of the oil level cannot meet the requirements, the cable terminal will heat up and the insulation performance will be reduced. In severe cases, safety accidents such as terminal explosion may occur, which is a major hidden danger for the safe operation of power cables. In actual production, safety accidents caused by insulating oil liquid level drop or oil leakage are common. At present, there is no detection scheme for the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M3/28G01F23/296
Inventor 祁宏昌莫润阳吴倩陆浩臻黄嘉盛牛海清
Owner GUANGZHOU POWER SUPPLY BUREAU GUANGDONG POWER GRID CO LTD
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