CT power taking-based power taking device and method employing overhead lightning protection ground wire of power transmission line

Abstract

The invention discloses a CT power taking-based power taking device and method employing an overhead lightning protection ground wire of a power transmission line. The power taking device comprises power taking cores, wherein the power taking cores are connected with an overvoltage protection unit; the overvoltage protection unit is connected with a power voltage stabilizing unit; a power monitoring unit is connected with an output end of the overvoltage protection unit; one power taking core L1 is arranged on each of two sides of left and right ground wire hanging points of each iron tower; and the output end of each power taking core L1 is connected with an input end of the overvoltage protection unit through an insulating cable. Power is obtained through the annular power taking cores on an alternating magnetic field generated around the overhead ground wire by using induced current on the overhead ground wire; a plurality of power taking cores can be connected in parallel at the same time to improve the total power taking efficiency of the power taking device; meanwhile, overvoltage protection of input voltage is achieved by adopting a switch-type short circuiting device in a power supply; the whole work efficiency and the security of the power taking device are improved; and the disadvantages of the prior art are avoided.

Description

technical field [0001] The invention belongs to the technical field of power supplies, and in particular relates to an energy harvesting device and method for an overhead lightning protection ground wire of a transmission line based on CT power harvesting. Background technique [0002] With the rapid development of the national economy, the demand for electricity in all walks of life is increasing, and the requirements for the power supply department to provide power quality, that is, stability, uninterrupted and accompanying services, are also getting higher and higher. Therefore, long-distance high-voltage power transmission The safety of the power grid operation of the line is particularly important. [0003] At present, the geographical environment and climatic conditions of long-distance high-voltage transmission lines are relatively harsh. And because the places where high-voltage transmission lines pass are mostly high mountains, it is very difficult to monitor high-...

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Problems solved by technology

[0012] Many research institutions in China have also done some related research in this field, but they mainly use the method of taking power by voltage. This method is relatively simple to implement, but there is a weakness in use: it can only be installed In the overhead ground wire network with segmented grounding structure, and each tension section can only install two power-taking devices at most, it is completely unusable for the tower-by-tower ground wire network that is currently widely used in China

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