Partial discharge monitoring device in intermediate joint of 10kV distribution cable

Abstract

The invention relates to a partial discharge monitoring device in an intermediate joint of a 10kV distribution cable. The partial discharge monitoring device in the intermediate joint of the 10kV distribution cable comprises a power supply unit, an electromagnetic guiding unit, a signal processing unit, a host system, a cable body, an intermediate joint shielding net, a cable intermediate joint body, a power supply unit protection shell, and a signal processing unit protection shell; a part of the electromagnetic guiding unit is internally built in the cable intermediate joint body and is usedfor detecting an electromagnetic wave signal generated by partial discharge of the cable intermediate joint body and transmitting the electromagnetic wave signal to the signal processing unit; another part of the electromagnetic guiding unit is arranged outside of the intermediate joint shielding net and is used for radiating electromagnetic waves to space near the cable intermediate joint body;the electromagnetic wave signal is received, amplified, and filtered by the signal processing unit, and then the electromagnetic wave signal is transmitted to the host system for analysis in a wireless transmission mode; and the power supply unit supplies power to the signal processing unit. The partial discharge monitoring device in the intermediate joint of the 10kV distribution cable can improve the detection effect and working efficiency of cable joint partial discharge.

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] ...

AI Technical Summary

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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