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10kv XLPE cable water branch aging detection system

A cross-linked polyethylene, detection system technology, applied in the direction of testing dielectric strength, etc., can solve problems such as many problems, long measurement time, slow residual charge discharge speed, etc., to achieve good discrimination, shorten the measurement process, and aging characteristics. significant effect

Active Publication Date: 2016-06-08
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Despite the many advantages of the residual charge method, there are still many problems in its application.
Among them, the problem of long measurement time is particularly prominent due to the slow discharge rate of residual charge

Method used

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  • 10kv XLPE cable water branch aging detection system
  • 10kv XLPE cable water branch aging detection system
  • 10kv XLPE cable water branch aging detection system

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Embodiment Construction

[0026] The implementation of the present invention will be described in further detail below in conjunction with the accompanying drawings. The following embodiments are only descriptive, not restrictive, and cannot limit the protection scope of the present invention.

[0027] A 10kV XLPE cable water branch aging detection system, such as figure 1 As shown, the system includes: a 10kV XLPE cable to be tested, a switch module, a repetitive frequency pulse unit, a DC power supply unit, an AC square wave unit, a detection resistor, a microcurrent meter, and a computer unit. The 10kV XLPE The outer insulating layer of the vinyl cable to be tested is grounded, the cable core wire is connected to the input terminal S0 of the switch module, the output terminal of the switch module is divided into four terminals S1, S2, S3 and S4, and the DC power supply unit is connected between the S1 terminal and the ground, and the S2 terminal Directly ground, connect the repetition frequency puls...

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Abstract

The invention relates to a 10kV cross-linked polyethylene cable water branch aging detection system. The system includes: a 10kV cross-linked polyethylene cable to be tested, the outer insulation layer of the 10kV cross-linked polyethylene cable to be tested is grounded, and the cable core wire and the switch The input terminal of the module is connected to S0, and the output terminal of the switch module is divided into four terminals: S1, S2, S3 and S4. The DC power supply unit is connected between the S1 terminal and the ground, the S2 terminal is directly grounded, and the repetitive frequency pulse is connected between the S3 terminal and the ground. The unit is connected between the S4 terminal and the ground by connecting a circuit with an AC square wave unit connected in series with a detection resistor R, and a microcurrent meter is connected at both ends of the detection resistor R, and the microcurrent meter is connected to the computer through a serial bus. The invention can more thoroughly transform the pre-detrapping charge induced by the repetitive frequency pulse into leakage current, so that the measurement result can more truly reflect the aging degree of water branches.

Description

technical field [0001] The invention belongs to the technical field of cross-linked polyethylene cable insulation aging detection equipment, in particular to a 10kV cross-linked polyethylene cable water branch aging detection system. Background technique [0002] With the rapid development of my country's economy, the automation construction and transformation of the power industry, power supply and power consumption enterprises are constantly developing and improving, and people have put forward more stringent requirements for the reliability of power equipment operation. The degree of cableization of urban power grid is an important symbol to measure the technical and economic level of urban power grid, and it is also an important means to promote the process of urban civilization and improve the living environment of human beings. In recent years, XLPE insulated power cables have been widely used in major cities in China, and their safety has also attracted much attention...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/12
Inventor 李盛伟毛华马力王兆峰王楠昝晶晶兰春虎孔德来
Owner STATE GRID CORP OF CHINA
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