Current transformer energy-obtaining power supply working in wide current range

Abstract

The invention relates to the technical field of the current transformer energy obtaining, particularly to a current transformer energy-obtaining power supply working in a wide current range. The power supply comprises an energy obtaining unit, an impact protection unit, a voltage adjustment unit, a winding switching control circuit, an energy storage unit and a power supply channel selection circuit. The energy obtaining unit includes an annular iron core that can sleeve a power transmission conductor and can be closed or opened and a dual-winding secondary energy-obtaining coil with a center tap, wherein the dual-winding secondary energy-obtaining coil winds around the annular iron core; the center tap is arranged at the middle part of the general winding of the dual-winding secondary energy-obtaining coil and branch windings are formed. According to the invention, the power with a reasonable and compact structure can be used conveniently. With a relay, when the power transmission line current is low, circuit connection is realized by using the general winding of the dual-winding secondary energy-obtaining coil; and when the power transmission line current is heavy, circuit connection is realized by using the branch windings. The power supply is mainly used for providing power for the on-line monitoring device of the alternating-current power transmission line. The structure is simple and reliability is high; and the power supply can adapt to a wide dynamic current range and has the high energy obtaining efficiency.

Description

Technical field [0001] The invention involves the field of current interaction and energy technology. It is a current -in -current intestinal intestinal improving energy supply for a wide range of current. Background technique [0002] With the development of online monitoring technology of transmission lines, solving the problem of power supply supply of high -voltage side monitoring equipment has become a new hot spot for research.Common power supply methods mainly include solar power supply, battery power supply, laser power supply, and ultrasonic power supply. Due to the problems of volume, cost, output power, conversion efficiency, insulation, etc., the above methods have not been effectively used.The current interaction energy is a good magnetic conductor that can be opened on the line. The electromagnetic induction principle is used to intercept the energy from the interchange magnetic field surrounded by the line current.In order to meet the increasing load demand of the ...

AI Technical Summary

Problems solved by technology

[0007]The present invention provides a current mutual inductance energy harvesting power supply working in a wide current range, which overcomes the above-mentioned deficiencies in the prior art, and can effectively solve the current problem of existing transmission lines. The working current range of the mutual inductance energy harvesting power supply is narrow, the energy harvesting efficiency is low, and the application effect of the control circuit is not ideal.

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