Moisture intrusion degree monitoring and evaluating method for power cable terminal
A cable terminal and power cable technology, which is applied in the direction of testing dielectric strength, dielectric performance measurement, measuring resistance/reactance/impedance, etc., can solve the problems of safe and reliable operation of medium and high voltage cables, cable insulation breakdown, and corrosion of shielding layers and other problems to achieve the effect of avoiding the terminal explosion problem and reliable operation
A cable terminal and power cable technology, which is applied in the direction of testing dielectric strength, dielectric performance measurement, measuring resistance/reactance/impedance, etc., can solve the problems of safe and reliable operation of medium and high voltage cables, cable insulation breakdown, and corrosion of shielding layers and other problems to achieve the effect of avoiding the terminal explosion problem and reliable operation
CN110658431AActive Publication Date: 2020-01-07SOUTHWEST JIAOTONG UNIV
Image
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
[0037] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0038] like figure 1 As shown, the cable terminal moisture intrusion inspection device is used to quickly test the moisture intrusion phenomenon at the high-voltage power cable terminal in the power system. Its structure and usage are as follows:
[0039] When laying the distribution network cables in the cable trench, the cable terminal moisture intrusion inspection device is arranged at the terminal part. After the alloy casing (4) is in, use the upper screw (5), lower screw (7), left end screw (6) on the left side of the inspection device, and the upper screw (13) and lower screw (16) on the right side to inspect The device is fastened, wherein the upper screw (5), the lower screw (7), and the left end screw (6) are tightly attached to the surface of the waterproof sheath (8), and the upper screw (13) and lower screw (16) are in contact with the met...
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 invention discloses a moisture intrusion degree monitoring and evaluating method for a power cable terminal. The method comprises the following steps: arranging a cable terminal moisture intrusioninspection device at a terminal part when a power distribution network cable is laid; and monitoring the internal humidity of the cable terminal by using an inspection device, and judging whether theinspection device continuously monitors the internal humidity of the cable terminal or evaluates the moisture intrusion degree of the cable terminal. The method has the beneficial effects that a moisture phenomenon of the urban power distribution network cable terminal can be efficiently, accurately and conveniently evaluated in real time, the problem of terminal explosion caused by moisture intrusion in the cable terminal is avoided, and reliable operation of the method is realized. The moisture intrusion degree of the power cable terminal can be evaluated, and a basis is provided for further exploring the internal insulation state of the cable terminal.
Description
technical field [0001] The invention relates to the field of cable terminal fault evaluation, in particular to a method for monitoring and evaluating the moisture intrusion degree of a power cable terminal. Background technique [0002] With the continuous expansion of modern city functions, power cables, as a power energy transmission facility with excellent electrical and mechanical properties, have been more and more widely used. In recent years, cross-linked polyethylene cables have become the most important application choice in urban construction. Since the insulation of cross-linked polyethylene cables is an extruded whole, this type of cable is famous for its waterproof and moisture-proof performance at the beginning of its investment. It has been favored by users, promoted vigorously and replaced the original line on a large scale, and people often ignore the work of preventing moisture intrusion, so that large areas of cross-linked polyethylene cables are soaked in...
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
07 Jan 2020
Publication
CN110658431A
- IPC
- G01R31/12; G01R27/26
- CPC
- G01R27/2617; G01R31/1272
- Inventors
- 白龙雷; 何斌斌