A Partial Discharge Monitoring Device in the Intermediate Joint of 10kV Distribution Cable

Abstract

The invention relates to a partial discharge monitoring device in an intermediate joint of a 10kV power distribution cable, comprising a power supply unit, an electromagnetic guidance unit, a signal processing unit, a host system, a cable body, a shielding net of the intermediate joint, a cable intermediate joint body, a power supply unit protective shell and The signal processing unit protects the casing; a part of the electromagnetic guiding unit is built into the cable intermediate joint body to detect the electromagnetic wave signal generated by the partial discharge of the cable intermediate joint body, and sends the electromagnetic wave signal to the signal processing unit; the other part of the electromagnetic guiding unit is arranged in The outside of the intermediate joint shielding net is used to radiate electromagnetic waves to the space near the cable intermediate joint body; after the signal processing unit receives the electromagnetic wave signal, it amplifies and filters the electromagnetic wave signal, and transmits the electromagnetic wave signal to the system host through wireless transmission for analysis; power supply The unit supplies power to the signal processing unit. The invention can improve the detection effect and work efficiency of the partial discharge of the cable joint.

Description

technical field [0001] The invention relates to the field of partial discharge detection of power equipment, in particular to a partial discharge monitoring device in a 10kV distribution cable intermediate joint body. Background technique [0002] 10kV power cables are widely used in distribution network systems, and their safe operation is very important for the reliability of power supply for users. Years of operating experience have shown that most of the faults on the cable line are caused by the insulation failure of the cable intermediate joint body, mainly because the intermediate joint is made by hand on site, which is inevitably affected by factors such as the environment and manual skills. , resulting in defects such as contamination, insulation damage, and component misalignment. Therefore, it is of great significance to carry out the development of distribution cable insulation state detection technology and equipment for the safe operation of cables. [0003] ...

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Problems solved by technology

However, the two methods also have obvious shortcomings. The oscillatory wave technology requires the cable to be out of operation, which affects the power supply, while the pulse current method has poor anti-interference ability and low detection sensitivity.

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