Switch cabinet local discharge detecting instrument based on ultrahigh frequency antenna sensor

Abstract

The invention discloses a switch cabinet local discharge detecting instrument based on an ultrahigh frequency antenna sensor. The switch cabinet local discharge detecting instrument comprises the ultrahigh frequency antenna sensor with the frequency band ranging from 500MHz to 1.5GHz, a data line and a detecting device. The ultrahigh frequency antenna sensor is connected with the detecting device through a cable. The detecting device comprises a signal reasoning unit, a data collecting card, an ARM single-chip microcomputer, a printer and a touch screen, wherein the ARM single-chip microcomputer is connected with the printer and the touch screen, and the signal reasoning unit comprises a band-pass filter, a signal amplifier and a pulse stretcher. The switch cabinet local discharge detecting instrument has the advantages that the ultrahigh frequency local discharge signals generated by a switch cabinet can be effectively detected and analyzed on site, whether local discharge occurs in the switch cabinet or not can be judged, qualitative estimation of local discharge intensity can be performed, and the instrument is low in cost, compact in structure, convenient to carry during detection, high in sensitivity and signal to noise ratio, high in work efficiency, and convenient for the staff in daily detection.

Description

technical field [0001] The invention relates to the technical field of intelligent inspection, in particular to a switch cabinet partial discharge inspection instrument based on an ultra-high frequency antenna sensor. Background technique [0002] With the rapid development of my country's power industry construction, the modern power system is developing in the direction of large power grids, large units, ultra-high voltage, and large capacity. In order to ensure the stability and reliability of the power system, more safety requirements for power equipment are also proposed high demands. The switchgear is an important equipment commonly used in the power system. The internal faults of the switchgear are mainly insulation faults. When there is an insulation defect inside the switchgear, partial discharge will occur. Partial discharge is one of the important parameters reflecting the insulation performance of the switchgear. It is The symptoms and manifestations of the insul...

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Problems solved by technology

[0003] Analyzing the current UHF partial discharge detection equipment, from the perspective of the domestic market, most partial discharge detectors can only extract a small amount of effective signals from the rich partial discharge signals, and most of the products are fixed and large in size. The structure is more complicated and the portability is poor

In the current market, high-end portable partial discharge detectors are monopolized by some foreign manufacturers of traditional partial discharge detectors. The function of the detector is not perfect, so it is necessary to develop a hand-held detector with relatively low cost, which can eliminate various interferences in the detection process, and judge the strength of partial discharge signals, and has good portability. of

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