Power transmission line energy taking device with equivalent impedance adjusting function and application method thereof

Abstract

The invention discloses a power transmission line energy taking device with an equivalent impedance adjusting function and an application method thereof. The power transmission line energy taking device with the equivalent impedance adjusting function comprises a damping branch and an energy taking branch, and the damping branch and the energy taking branch are connected through a drainage wire; the damping branch comprises an open-air-gap damping magnetic core, a matching capacitor C, an adjustable resistor Rc and a bypass resistor RS, the open-air-gap damping magnetic core sleeves the power transmission line, a secondary winding is wound on the open-air-gap damping magnetic core, the matching capacitor C and the adjustable resistor Rc are connected in series to the secondary winding, and the matching capacitor C is coupled to the primary side of the open-air-gap damping magnetic core through the secondary winding. The air gap damping magnetic core, the secondary winding, the matching capacitor C and the adjustable resistor Rc form a resonant circuit, and the bypass resistor RS is connected with the secondary side of the air gap damping magnetic core in parallel. The device can achieve maximum power output, is suitable for different bus currents, is simple in structure, and can rapidly adjust equivalent impedance in real time.

Description

technical field [0001] The invention relates to an online energy harvesting power supply technology for high-voltage transmission lines, belongs to the field of power supply for online monitoring equipment of electric equipment, and specifically relates to an energy harvesting device for a transmission line with the function of adjusting equivalent impedance and an application method thereof. Background technique [0002] As an important part of the power grid, the transmission line is the main artery of electric energy transmission. Since the online monitoring equipment for power equipment can greatly reduce human resources, and can reflect the relevant parameters of the operation status of power equipment in real time, with the development of smart grid construction in China, the application of online monitoring devices for transmission lines is becoming more and more extensive. However, the reliable operation of transmission line on-line monitoring equipment has high requ...

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Problems solved by technology

[0006] The present invention provides a transmission line energy harvesting device with the function of adjusting equivalent impedance and its application method to solve the problem that the existing power transmission line energy harvesting device cannot target different The bus current situation, the equivalent impedance cannot be adjusted in real time, and the adjustment is difficult

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