Method and device for measuring contact resistance
A technology of contact resistance and measurement method, which is applied in the direction of ground resistance measurement, measuring device, and measurement of electrical variables, etc., which can solve the problems of the error between the measured value and the actual value of contact resistance, and achieve the prevention of interference from external factors, less data, and accurate detection sex high effect
Active Publication Date: 2020-07-28
GUANGDONG POWER GRID CO LTD +1
View PDF4 Cites 1 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0004] However, when the skin effect is obvious, the above method of using the current-voltage method to directly measure the DC contact resistance instead of the AC contact resistance will cause a large error between the measured value and the actual value of the contact resistance
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0042] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of this application, not all of them. The components of the embodiments of the application generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.
[0043] Accordingly, the following detailed description of the embodiments of the application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the application. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art w...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The present application provides a method and device for measuring contact resistance, which are used to measure the contact resistance at the contact port between pre-twisted wire and ground wire, and relate to the technical field of contact resistance measurement. The method for measuring the contact resistance includes: obtaining AC currents of two different frequencies that meet the preset requirements of the contact resistance change rate; loading AC currents based on two different frequencies at the contact port of the pre-twisted wire and the ground wire, and measuring the pre-twisted wire and the ground wire respectively. The first voltage and the second voltage at the contact port of the wire and the ground wire; according to the first voltage and the second voltage, the contact resistance at the contact port of the pre-twisted wire and the ground wire is obtained. Using the contact resistance measuring method and device, the AC contact resistance can be directly measured, and the error existing between the measured value and the actual value of the contact resistance can be effectively reduced.
Description
technical field [0001] The present application relates to the technical field of resistance measurement, in particular, to a method and device for measuring contact resistance. Background technique [0002] The occurrence of disconnection accidents due to overheating of the ground wire often leads to power outages in large areas of the power grid, and even leads to secondary disasters, seriously affecting the safe and stable operation of the power grid and personal safety. Existing studies have shown that the inside of the pre-twisted wire fracture (the contact port between the pre-twisted wire and the ground wire) of the suspension string of the ground wire is a major heating "bottleneck" point, and the contact resistance of the pre-twisted wire fracture is the cause of the ground wire disconnection. an important factor. Therefore, the accurate measurement of the pre-twisted wire fracture contact resistance is an important basis for studying and analyzing its heating chara...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G01R27/08
CPCG01R27/08G01R27/20
Inventor 郑风雷尹创荣张远健陈冠豪刘贯科杨睿周潮夏云峰黄健华袁智斌吴勋张忠豪巫伟中王传旭邱秋辉陈灿辉陈华干
Owner GUANGDONG POWER GRID CO LTD