Cable wire system for high voltage cable oscillation wave partial discharge detection system

Abstract

The cable wire system for high voltage cable oscillation wave partial discharge detection system comprises a side connection mechanism of units under test, a side connection mechanism of solid switches and high voltage connecting lines, wherein the side connection mechanism of units under test includes a connecting piece of units under test and a first cable connector and the connecting piece of units under test is connected with the units under test. The side connection mechanism of solid switches includes a solid switch connecting piece and a second cable connector and the solid switch connecting piece is connected with the solid switch. The two ends of high voltage connecting line are respectively connected with the first cable connector of the side connection mechanism of units under test and the second cable connector of the side connection mechanism of solid switches. The system is simple in structure. Further, the cable wire system is not easy to generate corona and to discharge through the design which the cable wire part has a large distance from cable oscillation wave testing device, so that the system is stable and reliable in connection, capable of no partial discharge and beneficial to site test.

Description

technical field [0001] The invention relates to a cable outlet structure in a 10kv oscillating wave system, in particular to a cable outlet system for a high-voltage cable oscillating wave partial discharge detection system, and belongs to the technical field of cable oscillating wave partial discharge detection. Background technique [0002] There are three main detection methods for cable partial discharge: 1. Cable partial discharge detection under power frequency voltage; 2. Cable partial discharge detection under ultra-low frequency voltage; 3. Cable partial discharge detection under DC damped oscillation voltage; method 1 , due to the large capacitance of the power cable, it is difficult to carry out partial discharge detection under power frequency voltage on site; the method 2 requires a long test time, which will damage the cable insulation and cause new defects in the cable; among them Method 3, due to the high insulation resistance of XLPE (crosslinked polyethylen...

AI Technical Summary

Problems solved by technology

[0004] The cable oscillatory wave partial discharge detection system is a form of offline detection. When the cable oscillatory wave detection system is used to detect cable partial discharge, it is generally used to connect the outgoing part of the cable with the cable oscillatory wave detection equipment through clips, screws or even welding. Some even use insulating tape to fix and realize insulation at the connection between the cable outlet part and the cable oscillation wave detection equipment. This method is very rough. It is easy to cause corona and discharge, and in severe cases, it will cause breakdown, and the fixation is not firm, the connection is unstable, it is very inconvenient to install and disassemble, and it is easy to cause unnecessary damage to the cable

Most importantly, the use of the existing connection method will lead to partial discharge in the cable outlet part due to the loose fixation between the cable outlet part and the cable oscillatory wave detection device when the cable oscillatory wave detection system is used to detect the partial discharge of the cable. , resulting in inaccurate detection results

Images