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Re-locatable partial discharge transducer head

A technology of partial discharge and sensor devices, which is applied to the parts of transformers/inductors, parts of electrical measuring instruments, instruments, etc., and can solve problems such as uneconomical costs

Inactive Publication Date: 2003-11-26
TRANSGRID +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the case of relatively inexpensive small transformers or monitoring for partial discharge verification of transformers already in service, the cost of installing a fixed sensor head configuration and monitoring the transformer may not be economical

Method used

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  • Re-locatable partial discharge transducer head
  • Re-locatable partial discharge transducer head
  • Re-locatable partial discharge transducer head

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0061] A sensor probe according to the invention for detecting partial discharges occurring in on-line high voltage electrical equipment, such as transformers, is indicated generally at 10 in FIG. 1 .

[0062] The probe 10 includes an ultrasonic transducer 11 mounted on one end 12 of an elongated electrical grade fiberglass rod 13 . The rod 13 has the shape of a cylindrical tube with a central lumen 14 extending from one end 12 to a distal end 15 .

[0063] The ultrasonic sensor 11 shown is a ceramic / polymer composite with 1-3 geometries. The ceramic inside the sensor 11 is lead zirconate titanate (PZT). The polymer in the composition is a thermosetting epoxy resin. It can be understood that other suitable piezoelectric materials, including piezoelectric ceramics and polymers, can also be used as the ultrasonic sensor 11 in the present invention.

[0064] Each surface of the composite sensor 11 has electrodes accumulating charge, each electrode comprising, in the embodiment...

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PUM

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Abstract

An apparatus (10) for detecting the occurrence of partial discharge in electrical equipment, such as high voltage transformers. The apparatus comprises a detecting means including an ultrasonic transducer (11) mounted at one end of an electrically insulating elongate rod (13). The ultrasonic transducer (11) is adapted to detect ultrasonic pulses or waves generated by the occurrence of a partial discharge in the electrical equipment. A radio frequency (RF) transducer (17) is also utilized to detect radio frequency (RF) pulses or waves also generated by the partial discharge. The rod (13) can be mounted in the wall of the electrical equipment and so provide a mechanism for adjusting the position of the detecting means within the electrical equipment. The apparatus is also removable from the electrical equipment and re-locatable to other equipment.

Description

technical field [0001] The present invention relates to a system for monitoring the performance of electrical equipment such as high voltage transformers. In particular, the system includes sensors for detecting and locating faults throughout the insulation of the transformer. Background technique [0002] High voltage generators and transmission transformers form an integral part of any power generation, distribution and transmission system. Other transformers such as rectifier transformers are also used in industrial processes such as smelting and electrodeposition. Likewise, current transformers are used for protection and metering of power distribution systems. [0003] For oil-filled transformers, the most important parts of the insulation include the paper wrapped around the copper windings and the oil itself. In a transformer there are spacers, gaskets, seals, lead throughplates, taps and bushings which also act as part of the insulation system within the transform...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R1/067G01R31/12H01F27/40H01H33/26
CPCH01F2027/406H01F27/402G01R31/1272G01R31/1209H01H33/26
Inventor 约瑟夫·昂斯沃思戴维·塔利斯
Owner TRANSGRID