Sensor used for transformer partial discharge ultra wideband radio-frequency location

Abstract

The invention provides a sensor used for transformer partial discharge ultra wideband radio frequency location, comprising an antenna module and an encapsulation module, wherein, the antenna module isused for detecting partial discharge radio-frequency signals from a plurality of points and realizing the wavy coupling-out of the radio-frequency signals; the encapsulation module is used for encapsulating the antenna module. The invention realizes the effects that the sensor in the invention has good time domain response characteristics, wide effective measuring frequency band and higher measuring sensitivity; the phase centers of the detected signals do not change along with the variations of center frequency in the measured frequency band. In the prior art, the measuring accuracy of locating parameter is lower owing to the poor time domain response characteristics of the location measuring sensor and narrower effective measuring frequency band, and also owing to the problem that the phase centers of the detected signals changes along with the variations of the center frequency in the measuring frequency band. The sensor in the invention overcomes the above problem.

Description

technical field [0001] The invention relates to the field of transformer maintenance, in particular to a sensor for ultra-wideband radio frequency positioning of transformer partial discharge. Background technique [0002] The power transformer is the pivotal equipment of the power system, and the reliability of its operation is directly related to the safety and stability of the power system. Statistical analysis of actual faults shows that insulation faults are the main reason affecting the normal operation of transformers, and partial discharge is an important cause of insulation faults. [0003] Accurate partial discharge fault location not only plays an important role in the assessment of partial discharge hazards, but also is one of the basic prerequisites for transformer condition-based maintenance. It can provide scientific guidance for transformer condition-based maintenance, so that maintenance personnel can carry out equipment maintenance in a targeted manner. In...

AI Technical Summary

Problems solved by technology

[0006] The present invention aims to provide a sensor for transformer partial discharge ultra-wideband radio frequency positioning, which can solve the problem of detecting the phase of the signal within the measurement frequency band due to the poor time domain response characteristics of the positioning measurement sensor and the narrow effective measurement frequency band in the related art The center changes with the change of the center frequency, which leads to the problem of low measurement accuracy of positioning parameters

[0008] Due to the adoption of the above technical scheme, it overcomes the poor time-domain response characteristics of the positioning measurement sensor in the related art and the narrow effective measurement frequency band. The phase center of the detection signal changes with the change of the center frequency in the measurement frequency band. The problem of low measurement accuracy, and then achieved good time domain response characteristics, effective measurement frequency bandwidth, the phase center of the detection signal in the measurement frequency band does not change with the change of the center frequency, and has the effect of high measurement sensitivity

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