Damp removal and straightening experimental method for damp solid cables

An experimental method and solid technology, applied in the experimental field, can solve problems such as less research, and achieve the effect of convenient, accurate and high-efficiency detection

Inactive Publication Date: 2013-04-24
SHANGHAI MUNICIPAL ELECTRIC POWER CO +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Faced with the above problems, how to detect the moisture content on the surface of XLPE ...

Method used

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  • Damp removal and straightening experimental method for damp solid cables

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Experimental program
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Effect test

Embodiment

[0020] Such as figure 1 Shown, a kind of dehumidification straightening experiment method of wet solid cable, this method comprises the following steps:

[0021] 1) The wet solid cable to be tested and the new solid cable used as the alignment standard are pretreated so that the surface of the solid cable exposes a main insulation layer with a length of 5 cm as the measurement section. The measurement section of the wet solid cable to be tested is fully and uniformly sprayed with water to make it more conducive to reflecting the degree of humidity.

[0022] 2) Measure the conductivity of the wet solid cable to be tested and the measurement section on the new solid cable respectively, and the specific measurement method adopts the indirect measurement method. Firstly, input a DC voltage of 2000V at both ends of the measurement section, measure the surface leakage current of the solid cable, and obtain the conductivity of the solid cable through calculation of the surface leaka...

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Abstract

The invention relates to a damp removal and straightening experimental method for damp solid cables. The method comprises the following steps: 1) the damp solid cables to be detected and brand new solid cables as straightening standard are pre-treated, so that main insulation layers are exposed on the surfaces of the solid cables as measurement sections; 2) the electric conductivities of the measurement sections on the damp solid cables to be detected and the brand new solid cables are measured respectively; 3) the damp solid cables to be detected are heated with constant temperature under different temperatures, and the electric conductivities of the measurement sections are detected in a real-time manner in the heating process; and 4) the electric conductivities obtained in a real-time manner are compared with that of the measurement sections on the brand new solid cables to obtain the optimal damp removal and straightening temperature and time. Compared with the prior art, the method can quickly and accurately determine the optimal damp removal and straightening temperature and time for the damp solid cables.

Description

technical field [0001] The invention relates to an experimental method, in particular to an experimental method for dehumidifying and straightening a wet solid cable. Background technique [0002] With the expansion of grid scale and the increase of grid voltage, solid cables represented by XLPE (cross-linked polyethylene) insulated power cables have been increasingly recognized for their reasonable technology and structure, excellent electrical performance and safe and reliable operation characteristics. more widely used. Especially in the field of high-voltage power transmission has made great progress. Compared with oil-filled cables, cross-linked cables are easy to lay and install, easy to operate and maintain, and there is no problem of oil dripping. [0003] However, the operation and research in recent years have shown that the insulation of XLPE cables tends to absorb moisture into the interface during operation, causing insulation aging and damage, which seriously...

Claims

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Application Information

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IPC IPC(8): G01N27/04
Inventor 史济康胡为进崔浩艾芊贺兴尹毅黄建涛华嘉成
Owner SHANGHAI MUNICIPAL ELECTRIC POWER CO
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