Cable joint with fault sensing structure and fault sensing system of cable joint

Abstract

The invention discloses a cable joint with a fault sensing structure and a fault sensing system of the cable joint, and relates to the technical field of cable joints. The cable joint with the fault sensing structure comprises an inner shell, a separation device is arranged in the inner shell, a cable joint body is arranged in the separation device, a temperature sensor and an inductive probe are fixedly mounted in the inner wall of the inner shell, an outer shell is fixedly connected to the exterior of the inner shell, a control box is fixedly connected to the top of the outer shell, and a controller is fixedly mounted in the control box. According to the cable joint with the fault sensing structure and the fault sensing system of the cable joint, the temperature sensor and the sensing probe are arranged outside the cable joint, and the temperature sensor and the sensing probe are used for sensing and detecting the cable joint, the fault type of the cable joint can be conveniently and timely judged, and targeted preparation and maintenance by maintenance personnel are facilitated.

Description

technical field [0001] The invention relates to the technical field of cable joints, in particular to a cable joint with a fault sensing structure and a fault sensing system thereof. Background technique [0002] Cable is a kind of electric energy or signal transmission device, usually composed of several or several groups of wires, cables include power cables, control cables, compensation cables, shielded cables, high temperature cables, computer cables, signal cables, coaxial cables, fire-resistant cables , Marine cables, mining cables, aluminum alloy cables and so on. They are composed of single-strand or multi-strand wires and insulating layers, and are used to connect circuits, electrical appliances, etc. Cables can be divided into DC cables and AC cables according to the photovoltaic power station system. During the operation of the power grid, the cable joint is the weakest link, and about 70% of the cable faults occur at the joint. [0003] In the current cable joi...

AI Technical Summary

Problems solved by technology

[0003] In the current cable joints, most of the cables in the two cables that need to be connected are butted one by one, wrapped with insulating tape, and then the multiple cables are combined together, and then wrapped with insulating tape in multiple layers. After the cable has a virtual connection and heats up, it is very easy to melt the insulating tape wrapped on the outer layer of the adjacent cable, which will cause a fire and power failure, and there is a certain safety hazard

The electric field stress of the intermediate joint of the power cable is relatively concentrated, which is the weak link of the power cable insulation. It is often easy to cause cable breakdown due to the deterioration of the cable insulation performance, that is, the problem of partial discharge, which is easy to cause high-voltage cable accidents.

In addition, it is impossible to detect and locate the cable joints that cause power outages in real time. During maintenance, multiple cables need to be detected one by one to find the accident point, which is time-consuming and labor-intensive.

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