Device using reflective high energy electron diffraction technology to detect high voltage cable partial discharge

Abstract

The invention provides a device using a reflective high energy electron diffraction technology to detect high voltage cable partial discharge, which belongs to the field of nondestructive detection of charged high voltage cable partial discharge. The invention particularly relates to the device using the reflective high energy electron diffraction technology to detect high voltage cable partial discharge. The device which uses the reflective high energy electron diffraction technology to detect high voltage cable partial discharge is convenient for use. The device provided by the invention comprises a host casing, a high frequency current transformer, a calibration pulse generator, a 40KHz ultrasonic sensor, a 150KHz ultrasonic sensor, a special high frequency sensor, a transient ground voltage sensor, an upper computer and an electroacoustic integrated sensor. The device is technically characterized in that the host casing is provided with a channel signal input port, a power supply switch, a battery charging port, a host casing ground knob and a power supply output port; and the channel signal input port comprises a first electrical signal port, a second electrical signal port, a third electrical signal port, a fourth electrical signal port, a first optical signal port and a second optical signal port.

Description

technical field [0001] The invention belongs to the field of non-destructive detection of partial discharge of charged high-voltage cables, and in particular relates to a detection device for partial discharge of high-voltage cables using reflection high-energy electron diffraction technology. Background technique [0002] With the rapid development of the national economy, various wires and cables have been widely used, the wire and cable industry has developed rapidly, the production scale has gradually expanded, and the market share has increased year by year. As an important non-destructive testing commodity, cables have high requirements for precision in national standards. However, the measurement problems in the current wire and cable market are becoming more and more prominent. How to accurately, quickly and economically realize the measurement of non-destructive testing of cables has important theoretical significance and research value. [0003] The surfaces of al...

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Problems solved by technology

[0004] There are many detection methods for high-voltage cable partial discharge at home and abroad, but because the high-voltage cable partial discharge signal is weak, the waveform is complex and changeable, and it is easily overwhelmed by the background noise, the high-voltage cable partial discharge live detection technology is very difficult.

The commonly used method is the IEC60270 method, but because its measurement frequency band is usually only a few hundred KHZ, the ability to capture high-frequency signals is poor, and the IEC60270 method is also easily affected by background noise, and its anti-interference ability is poor In recent years, the cable partial discharge test methods commonly used at home and abroad mainly include differential method, directional coupling method, electromagnetic coupling method, capacitive coupling method, UHF method, ultrasonic method, AE detection method, etc.

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