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Method and system for measuring pressure bonding resistance of cable joint

A technology of cable joints and measurement methods, which is applied in the field of power grids, can solve problems such as complex process errors, and achieve the effect of simple, simple and accurate measurement of the measurement process

Active Publication Date: 2016-01-27
GUANGZHOU POWER SUPPLY BUREAU GUANGDONG POWER GRID CO LTD
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  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Based on this, it is necessary to provide a simple and accurate method and system for measuring the crimping resistance of cable joints in view of the complex process and large errors of the general cable joint crimping resistance measurement method

Method used

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  • Method and system for measuring pressure bonding resistance of cable joint
  • Method and system for measuring pressure bonding resistance of cable joint
  • Method and system for measuring pressure bonding resistance of cable joint

Examples

Experimental program
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Embodiment Construction

[0022] like figure 1 As shown, a method for measuring the crimping resistance of a cable joint, including steps:

[0023] S100: Set a first measurement point and a second measurement point at both ends of the cable joint, and set a third measurement point on the cable separated by a certain distance from the first measurement point or the second measurement point.

[0024] The cable joint is arranged on the cable, and is used to realize the connection of the cable length and the cross interconnection of the three-phase lines. During the test, the cable connector can be set in the middle of the cable, that is, cables are connected to both ends of the cable connector. like figure 2 As shown, connect the cable at both ends of the cable joint to set the first measurement point A and the second measurement point B respectively, and set the third measurement point C on the cable with the first measurement point A or the second measurement point B at a certain distance ( figure...

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Abstract

The invention provides a method and a system for measuring the pressure bonding resistance of a cable joint. The method comprises the steps: a first measurement point and a second measurement point are arranged on two ends of the cable joint, a third measurement point is arranged on the cable, the current is applied to the cable joint, the temperature of the cable joint is measured, when the temperature of the cable joint reaches a stable state, and the effective voltage, the effective current and the phase angle between the first measurement point and the third measurement point as well as between the second measurement point and the third measurement point are measured; according to the AC resistance calculating formula, the AC resistance between the first measurement point and the third measurement point is calculated, and the AC resistance between the second measurement point and the third measurement point is calculated, the absolute value of the difference value between the two AC resistance is calculated, and the pressure bonding resistance of the cable joint is acquired. The measuring process is simple, and the rigorous mathematical calculation is adopted, so that the pressure bonding resistance of the cable joint can be simply and accurately measured.

Description

technical field [0001] The invention relates to the technical field of power grids, in particular to a method and system for measuring crimping resistance of cable joints. Background technique [0002] The cable joint is an important part of the cable line, which is used to realize the connection of the cable length and the cross-connection of the three-phase line. Whether the cable line can run safely depends largely on the success of the cable core connection. There are two methods of connecting cable cores: welding and crimping. Due to the high technical requirements of the welding process, the connection of the cable core is usually realized by crimping. The conductor core is connected by crimping, which changes the flow cross section of the joint connection point. The contact resistance of the crimping surface between the connecting tube and the cable core (hereinafter referred to as crimping resistance) is the main reason for the heating of the cable intermediate joi...

Claims

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Application Information

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IPC IPC(8): G01R27/14
Inventor 徐涛刘毅刚徐研张耿斌朱妮妮董礼勇
Owner GUANGZHOU POWER SUPPLY BUREAU GUANGDONG POWER GRID CO LTD
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