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Active excitation type multi-frequency induced current cable identification method and device

A technology of induction current and identification device, which is applied in the field of electric power, can solve the problems of low safety, complicated operation, contact with metal parts of cables, etc., and achieve the effect of high safety and simple operation

Active Publication Date: 2016-08-31
重庆旋易智能技术有限公司
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Problems solved by technology

After long-term operation, the resistance value of individual nodes will increase due to factors such as installation method or installation process, which seriously affects the safe operation of the cable.
[0003] In cable engineering, how to quickly and accurately identify the target cable is very important. The current identification method requires the target cable to be in a power-off state before the cable identification. The disadvantage of this is that it not only greatly reduces the efficiency of cable identification, but also requires Touching the metal part of the cable, the operation is complicated, the safety is low, and it brings economic losses

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  • Active excitation type multi-frequency induced current cable identification method and device
  • Active excitation type multi-frequency induced current cable identification method and device

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with accompanying drawing and embodiment: figure 1 It is a schematic diagram of the principle of the present invention, figure 2 It is a schematic diagram of the cable structure of the present invention.

[0023] Such as figure 1 , 2 As shown, the active excitation type multi-frequency induction current cable identification method in this embodiment includes using the loop formed by the cable armor layer, the ground wire and the earth as the secondary coil, and the AC signal is generated by the excitation source to drive the primary coil. The induced voltage generated in the secondary coil further generates an induced loop current in the loop formed by the cable armor layer, the ground wire and the earth, and by detecting the induced loop current, the loop impedance of the cable armor layer is obtained. Such as figure 2 As shown, according to the layered structure of the high-voltage cable, the c...

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Abstract

The invention provides an active excitation type multi-frequency induced current cable identification method and device. The active excitation type multi-frequency cable identification method comprises steps of using a loop formed by a cable armoring layer, grounding wires and the ground as a secondary coil, generating a coding AC signal through an excitation source to drive a primary coil, generating induced voltage with a specific curve in the secondary coil, generating coding loop current with corresponding characteristics through induction in the loop formed by the high voltage cable armoring layer, grounding wires on two ends and the ground, collecting induction loop current through a high accuracy current mutual inductor, and obtaining cable grounding impedance to realize monitoring of state and characteristics of a cable. The active excitation type multi-frequency cable identification method and device can finish on-site multi-point networking through coding induced current autonomous communication on the high voltage or extra-high voltage cable which is generated through active excitation and then realize cable whole circuit identification and tracking.

Description

technical field [0001] The invention relates to the field of electric power, in particular to an active excitation multi-frequency induction current cable identification method and device. Background technique [0002] Wire and cable are wire products used to transmit electric (magnetic) energy, information and realize electromagnetic energy conversion. Wires and cables in a broad sense are also referred to as cables for short. Cables in a narrow sense refer to insulated cables. Among them, 1KV and below are low-voltage cables; 1KV-10KV are medium-voltage cables; 10KV-35KV are high-voltage cables; 35-220KV are UHV cables; UHV cables are generally used as the central link belt in large-scale power transmission systems. They are high-voltage cables with high technical content and are mainly used for long-distance power transmission. Power cables between 35KV (1KV=1000V) are mostly used in main roads for power transmission. The components of high-voltage cables from the insid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00
CPCG01R31/00
Inventor 王远平石亚伟陈孟钢王宇廖金波潘成刚
Owner 重庆旋易智能技术有限公司
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