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Installing method of sensor for detecting XLPE (cross linked polyethylene) power cable partial discharge

A technology for power cables and installation methods, applied in the direction of testing dielectric strength, etc., can solve the problems of high use cost and poor versatility, and achieve low manufacturing and use costs, enhanced versatility, and avoid corona or suspension discharge phenomenon. Effect

Active Publication Date: 2013-09-04
STATE GRID CORP OF CHINA +2
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  • Claims
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AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is the poor versatility and high cost of use of the partial discharge detection sensor in the prior art due to the use of ring electrodes, thereby providing a highly versatile XLPE power cable partial discharge detection sensor and how to install it

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  • Installing method of sensor for detecting XLPE (cross linked polyethylene) power cable partial discharge
  • Installing method of sensor for detecting XLPE (cross linked polyethylene) power cable partial discharge

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Embodiment Construction

[0027] As an embodiment of the present invention, the described sensor installation method for partial discharge detection of XLPE power cables, such as figure 1 shown, including the following steps:

[0028] S1: Set the XLPE power cable accessories at the joint of the XLPE power cable, such as figure 2 As shown, wherein, the XLPE power cable accessory includes an inner semiconductive layer 2, an insulating layer 3 and two outer semiconductive layers from the inside to the outside, and the inner semiconductive layer 2 is formed to accommodate the XLPE power cable The accommodating part of the core joint 1, the insulating layer 3 is annularly wrapped outside the inner semiconductive layer 2, and the two outer semiconductive layers are annularly wrapped outside the insulating layer 3 and are respectively located on the insulating layer 3 at both ends, and between the two outer semiconducting layers is an exposed ring-shaped insulating layer 3 . Wherein, the XLPE power cable a...

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Abstract

The invention relates to an installing method of a sensor for detecting XLPE (cross linked polyethylene) power cable partial discharge, which comprises the steps of firstly surrounding a flaky UHF sensor on the outer side of an exposed band insulating layer of an XLPE power cable accessory in a wrapping way, and then enabling the flaky UHF sensor to form an annular UHF sensor through seamless welding, in such a way, the propagation of an ultrahigh frequency signal is facilitated, and the original insulativity and electric field distribution of the XLPE power cable accessory are prevented from being damaged. The UHF sensor provided by the invention has the advantages that the head end and the tail end of the UHF sensor are in seamless welding, so that the phenomenon of electric corona or suspended discharge can be effectively avoided; and more importantly, since the UHF sensor is flaky, the UHF sensor can be cut and installed on site according to the thickness of the XLPE power cable accessory, so that the installation process can be greatly simplified, the working efficiency is improved, the manufacturing and use cost is reduced, and the universalityis greatly enhanced.

Description

technical field [0001] The invention relates to a sensor installation method for XLPE power cable partial discharge detection, belonging to the technical field of XLPE power cable partial discharge detection. Background technique [0002] Compared with the traditional overhead line power supply, XLPE (cross linked polyethylene, cross-linked polyethylene) power cable power supply has the advantages of not being affected by the external environment, saving land, and good electrical performance. With the development of urban power grids, the utilization rate of XLPE power cables continues to increase, and the reliability of XLPE power cables has attracted the attention of the power sector. [0003] There are many reasons for cable failures. Through the statistical analysis of cable operation failures, it is found that most of the failures occur in the middle joint of the cable and its surrounding areas. Since there are a large number of composite interfaces and electric field ...

Claims

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Application Information

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IPC IPC(8): G01R31/12
Inventor 时翔赵生传陈志勇王兴照韩克存刘颂菊张立刚曲健唐志国
Owner STATE GRID CORP OF CHINA
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