Electric power transformer insulated on-line monitoring sensor mounting device

A technology for power transformers and installation devices, which is applied to measuring devices, measuring electrical variables, components of electrical measuring instruments, etc., can solve problems such as social impact, economic losses of transformer operating departments, and reduction of power system reliability.

Inactive Publication Date: 2009-10-28
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the outage of the transformer will not only reduce the reliability of the power system, but also bring huge economic losses and serious social impact to the transformer operation department.

Method used

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  • Electric power transformer insulated on-line monitoring sensor mounting device
  • Electric power transformer insulated on-line monitoring sensor mounting device
  • Electric power transformer insulated on-line monitoring sensor mounting device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A sensor installation device for on-line monitoring of power transformer insulation includes a base (1), a movable probe (2), an end cover (3), a first oil-resistant sealing ring (4) and a second oil-resistant sealing ring (5). One end of the base (1) is a disc body with a thickness of 35mm. The disc body is evenly distributed on the same circumference with 4 circular through holes with a diameter of 14mm corresponding to the connection holes on the power transformer drain valve. The base ( 1) The other end is a cylinder with a thickness of 300mm. On the same circumference of the end of the cylinder, there are 4 connecting circular holes with a diameter of 10mm and a circular sealing groove with a diameter and a width of 110mm and 4.5mm respectively. There is a circular through hole in the base (1) parallel to the circular through hole in the disc body of the base (1) and the diameter is 78mm. The inner wall of the circular through hole in the base (1) has 5 diameters and w...

Embodiment 2

[0023] A sensor installation device for on-line monitoring of power transformer insulation includes a base (1), a movable probe (2), an end cover (3), a first oil-resistant sealing ring (4) and a second oil-resistant sealing ring (5). One end of the base (1) is a disc body with a thickness of 20mm. On the same circumference of the disc body, 8 circular through holes with a diameter of 10mm corresponding to the connection holes on the power transformer drain valve are evenly distributed. The base ( 1) The other end is a cylinder with a thickness of 180mm. On the same circumference of the end of the cylinder, there are 8 connecting circular holes with a diameter of 6mm and a circular sealing groove with a diameter of 70mm and a width of 4.5mm, respectively. The seat (1) has a circular through hole parallel to the circular through hole in the disc body of the base (1) and a diameter of 53mm. The inner wall of the circular through hole in the base (1) has 4 diameters and widths of 56m...

Embodiment 3

[0025]A sensor installation device for on-line monitoring of power transformer insulation includes a base (1), a movable probe (2), an end cover (3), a first oil-resistant sealing ring (4) and a second oil-resistant sealing ring (5). One end of the base (1) is a disc body with a thickness of 15mm. On the same circumference of the disc body, 6 circular through holes with a diameter of 12mm corresponding to the connecting holes on the power transformer drain valve are evenly distributed. The base ( 1) The other end is a cylinder with a thickness of 60mm. On the same circumference of the end of the cylinder, there are 6 connecting holes with a diameter of 8mm and an annular sealing groove with a diameter of 42mm and a width of 4.5mm, respectively. In the base (1) there is a circular through hole parallel to the circular through hole in the disc body of the base (1) and a diameter of 23mm. The inner wall of the circular through hole in the base (1) has two diameters and widths of 26mm...

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Abstract

A sensor installation device for on-line monitoring of power transformer insulation relates to a sensor installation device for on-line monitoring of transformer insulation, which solves the problem that the on-line monitoring sensor must be pre-installed during the transformer manufacturing process or can only be installed after the transformer is powered off and insulating oil is released. The technical scheme of the invention includes a base, a movable probe, an end cover and an oil-resistant sealing ring. One end of the base is fixed on the oil discharge valve of the power transformer; the movable probe is a T-shaped cylinder, and one end of the T-shaped cylinder is fixed on the end surface of the cylinder of the base and sealed by an oil-resistant sealing ring. The other end of the body passes through the through hole in the base. The arithmetic average deviation Ra of the surface roughness parameter profile of the cylinder end surface of the base and the annular groove on the cylinder end surface and the outer surface of the movable probe is 1.25-3.2 μm. The invention can quickly install the insulation on-line monitoring sensor under the normal operation or power failure state of the power transformer, so as to avoid the leakage of insulating oil during the installation process.

Description

Technical field [0001] The invention relates to a sensor installation device for on-line monitoring of the insulation of a power transformer. Background technique [0002] The power transformer is one of the important equipment in the power system, and its stable operation is of great significance to improving the reliability of power supply. In order to improve the reliability of power supply, transformer operation departments at home and abroad are gradually installing insulation online monitoring systems to ensure their stable operation. At present, the transformer insulation online monitoring system mainly uses sensors to obtain the operating state characteristic parameters of the transformer. These sensors must be installed in advance during the manufacturing process of the transformer or after the transformer is shut down and the insulating oil is discharged. However, the outage of the transformer will not only reduce the reliability of the power system, but also bring huge...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/00G01R1/02
Inventor 王有元陈伟根杜林廖瑞金陈明英李剑孙才新唐炬
Owner CHONGQING UNIV
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