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A kind of power cable connector and its manufacturing method

A power cable and stress cone technology, which is applied in the field of prefabricated power cable intermediate joints and its production, can solve the problems of bringing in impurities, unable to detect and locate the cable joints, and inaccurate positions, etc.

Active Publication Date: 2020-10-27
GLOBAL ENERGY INTERCONNECTION RES INST EURO GMBH +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the inability of the power cable joint temperature measurement system in the prior art to detect the entire cable joint and locate the abnormal point, the discharge situation at the joint cannot be detected, and the position of the power cable joint built-in optical fiber is not accurate. and the defects that are easy to bring in impurities, a power cable intermediate joint and its manufacturing method are provided

Method used

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  • A kind of power cable connector and its manufacturing method
  • A kind of power cable connector and its manufacturing method
  • A kind of power cable connector and its manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A power cable joint, comprising:

[0040] High voltage shielding tube 2;

[0041] The joint body is wrapped on the outside of the high-voltage shielding tube;

[0042] The optical fiber sensor only includes the optical fiber itself, which is located inside the joint body and runs through the entire joint body; the optical fiber sensor is a certain distance away from the edge of the joint body, and the optical fiber sensor is connected to the temperature detection system and the discharge detection system.

[0043] In the present invention, the optical fiber sensor is arranged inside the joint body and runs through the entire joint body. At the same time, there is a certain distance between the optical fiber and the edge of the joint body, which simplifies the structure of the joint. The discharge phenomenon interferes with the detection of the electric field strength, so that the discharge situation at the joint body can be detected more accurately.

[0044] The joint...

Embodiment 2

[0049] The difference between this embodiment and Embodiment 1 is that: the optical fiber sensor is disposed inside the connector body in a straight-through manner. Others are consistent with Example 1.

Embodiment 3

[0051] The method for making the above-mentioned power cable connector includes the following steps:

[0052] Include the following steps:

[0053] Step 1: Through electric field strength analysis and thermal analysis, determine the best fiber optic sensor implantation position inside the connector body; import this design into the mold design, and manufacture the corresponding connector body mold;

[0054] Step 2: Preset the optical fiber sensor in the mold of the joint body in a helical winding and / or straight-through manner on the workbench at the optimal implantation position of the optical fiber sensor, and then form the joint body by conventional injection molding methods;

[0055] Step 3: Sleeve the connector body on the outside of the high voltage shielding tube to form the power cable connector.

[0056] The joint body includes a stress cone 1 and an electric field enhancing insulator 3; the optical fiber sensor includes a first optical fiber 4.1 and a second optical...

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Abstract

A power cable joint, characterized in that it includes: a high-voltage shielding tube; a joint body wrapped on the outside of the high-voltage shielding tube; an optical fiber sensor, which only includes the optical fiber itself, which is located inside the joint body and runs through the entire joint body; The optical fiber sensor has a certain distance from the edge of the joint body; the optical fiber sensor is connected with a temperature detection system and a discharge detection system. The invention simplifies the structure of the joint detection system, and there is no detection blind area; at the same time, it also prevents the interference of the discharge phenomenon at the interface to the detection of the electric field strength, so that the discharge situation at the joint body can be detected more accurately.

Description

technical field [0001] The invention belongs to the field of power cable accessories, and in particular relates to a prefabricated power cable intermediate joint with built-in optical fiber and a manufacturing method thereof. Background technique [0002] The intermediate joint body of ordinary medium and high voltage power cables does not contain built-in optical fiber. Although the function only realizes the optimization of the electric field, the supporting temperature detection and partial discharge early warning system cannot carry out early warning and monitoring on the existing intermediate joint body, resulting in the failure of the entire cable. The system forms a monitoring blind zone at the intermediate joint. [0003] In order to facilitate early warning of the power cable intermediate joint body, a new type of power cable joint has appeared in the prior art, such as Chinese patent CN104977097A, which fixes a temperature measuring probe 8 on the cable joint, and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02G15/18G01R31/12G01K11/32
CPCH02G15/18G01K11/32G01R31/1218
Inventor 周明瑜雷宪章贺之渊韩正一王海田蔡力钧刘伟麟蓝元良孟晓刚李多
Owner GLOBAL ENERGY INTERCONNECTION RES INST EURO GMBH