A stable energy harvesting device for high-voltage transmission lines and its application method

Abstract

The invention discloses a stable energy harvesting device for a high-voltage transmission line and an application method thereof. The energy harvesting device includes a damping branch, an energy harvesting branch and an impedance regulating branch. The impedance regulating branch includes a regulating magnetic core T3 and a second wire l3 , a control rectifier circuit, a supercapacitor energy storage unit and an inverter circuit, a first switch K1 is connected in series between the second wire l3 and the power transmission cable, and a series connection between the supercapacitor energy storage unit and the load connection terminal of the energy-taking branch A second switch K2 is connected, and a third switch K3 is connected in series between the supercapacitor energy storage unit and the inverter circuit; the application method includes using the impedance regulation branch as a controllable current source to control the charging of the supercapacitor energy storage unit, The switching of the discharge state and the connection state of the output of the inverter circuit adjust the impedance of the damping branch to realize the stable energy collection of the high-voltage transmission line. The invention can obtain stable energy acquisition for the load when the current of the transmission line changes, and has the advantages of high energy acquisition stability, good real-time performance and fast response.

Description

technical field [0001] The invention mainly relates to the field of on-line power acquisition for high-voltage transmission lines, and in particular to a stable energy acquisition device for high-voltage transmission lines and an application method thereof. Background technique [0002] Considering the importance of transmission line operation safety and the ever-increasing safety hazards of accidents, research at home and abroad has focused on the monitoring of transmission line status parameters and fault diagnosis, making the real-time monitoring system of high-voltage transmission lines develop by leaps and bounds. The power supply for real-time monitoring equipment of transmission lines is not easy to obtain, and this has always been an important problem that limits the wide application of online real-time monitoring equipment for transmission lines. [0003] With the rapid development of my country's electric power industry and the improvement of the voltage level of t...

AI Technical Summary

Problems solved by technology

However, the conventional current transformer power-taking device mainly has problems such as magnetic Louis saturation, low electric power, and unstable energy-taking when the current of the transmission line changes.

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