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Compound sensor for transformer oil drain valve type partial discharge monitoring and positioning system

A composite sensor and positioning system technology, applied in the field of composite sensors, to achieve the effect of improving accuracy, improving efficiency, and reducing the difficulty of processing and installation

Inactive Publication Date: 2019-10-18
SHANGHAI MUNICIPAL ELECTRIC POWER CO +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the UHF method is used, the built-in UHF partial discharge monitoring has great advantages in terms of sensitivity and anti-interference, but the criterion of only a single signal source often makes the detection personnel or operators doubt whether there is a partial discharge or not. Doubtful, afraid to jump to conclusions

Method used

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  • Compound sensor for transformer oil drain valve type partial discharge monitoring and positioning system
  • Compound sensor for transformer oil drain valve type partial discharge monitoring and positioning system
  • Compound sensor for transformer oil drain valve type partial discharge monitoring and positioning system

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Embodiment 1

[0026] The present invention tries to start from the practical application, overcome the shortcomings of existing partial discharge UHF and ultrasonic signal detection sensors that are used independently of each other, and provide a composite sensor for transformer oil drain valve type partial discharge monitoring and positioning system. That is, using modular design and processing technology, the transmitting sensor for acoustic and ultrasonic measurement and the sleeve antenna sensor for electromagnetic wave measurement are designed into an integrated transformer installed on the transformer oil drain valve and capable of simultaneously measuring UHF and ultrasonic pulse signals. Composite sensor for partial discharge monitoring and location system. The composite sensor has the advantages of simplicity, practicability, reduced electromagnetic interference, and the ability to overcome the problem that sound waves propagate along the transformer shell and affect positioning. It...

Embodiment 2

[0039] In this embodiment, the ultrasonic sensor module 2 adopts a piezoelectric ceramic ultrasonic sensor, and the UHF sensor module 3 adopts a disk-type, semicircular dipole-type UHF sensor, and the combination of these methods is not limited.

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Abstract

The invention relates to a compound sensor for a transformer oil drain valve type partial discharge monitoring and positioning system. The sensor is arranged at an oil drain valve of the transformer,the compound sensor comprises a sensor module, a signal transmission module and a sensor mounting module; the sensor module and the mounting module are connected with the signal transmission module; the sensor module comprises an ultrasonic sensor module and an ultra-high frequency sensor module; and the sensor module is used for collecting the partially discharged ultrasonic signal and the ultra-high frequency signal of the transformer. Compared with the prior art, the ultrasonic sensor is designed as a built-in type, the electromagnetic interference problem, the acoustic wave signal attenuation problem and the problem that the positioning is influenced since the acoustic wave is propagated along a transformer shell are reduced; the ultra-high frequency and ultrasonic wave pulse signals are simultaneously measured by utilizing the ultrasonic wave sensor and the ultra-high-frequency sensor, the accuracy and efficiency of the monitoring and positioning are improved, and the processing difficulty and mounting difficulty are reduced.

Description

technical field [0001] The invention relates to a composite sensor, in particular to a composite sensor for a transformer oil discharge valve type partial discharge monitoring and positioning system. Background technique [0002] Partial discharge is partial discharge. Partial discharge is a discharge phenomenon in electrical components where the electric strength of the insulator is higher than that of the electric power plant to the electric field with lower electric strength. Partial creeping discharge. The damage caused by partial discharge to transformer insulation is serious, and partial discharge is one of the main causes of insulation damage. Due to the complex structure of large transformers, in order to analyze and judge the severity of internal discharges, it is necessary to monitor and locate the partial discharges inside the transformers. In addition, when troubleshooting the partial discharges of power transformers, it is also necessary to locate the partial d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/12G01R1/04
CPCG01R1/04G01R31/1209G01R31/1227
Inventor 司文荣傅晨钊杨凌辉黄华陈洪岗高凯陆启宇袁鹏
Owner SHANGHAI MUNICIPAL ELECTRIC POWER CO