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A 220KV single-circuit overhead transmission line insulate lightning conductor resonance energy extraction method

A technology for overhead transmission lines and lightning protection lines, applied in the direction of circuit devices, electrical components, etc., can solve the problems of difficult implementation, high cost of low-voltage lines, short life, etc., achieve broad application prospects, improve energy harvesting power, and transmit power. Effect

Active Publication Date: 2019-01-04
FUZHOU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, after long-term operation, the dust accumulated on the solar panel is not easy to clean, which will weaken the conversion efficiency of the solar cell.
The cost of erecting a dedicated low-voltage line is high, it is difficult to implement in remote areas, and it is not suitable for promotion; laser power supply is a new power supply method that can supply power at a constant power, but its cost is high and its life is short, so it is not an ideal power supply method
[0006] Therefore, how to ensure the normal power supply to the online monitoring device under such circumstances has become a technical bottleneck restricting the development of the online monitoring device for transmission lines.

Method used

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  • A 220KV single-circuit overhead transmission line insulate lightning conductor resonance energy extraction method
  • A 220KV single-circuit overhead transmission line insulate lightning conductor resonance energy extraction method
  • A 220KV single-circuit overhead transmission line insulate lightning conductor resonance energy extraction method

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Embodiment 1

[0042] In this embodiment, the measured induced voltage is 13kV using a 220kV insulated lightning conductor, the equivalent capacitance between the insulated lightning conductor and the transmission line is about 6.95nF / km, and the 2.8km long insulated lightning conductor has an equivalent capacitance of 19.56nF.

[0043] Insulation voltage coefficient k 1 Take 1, the saturation voltage coefficient k 2 Take 1.076. The step-down transformer is a 2000VA, 10000V / 220V step-down transformer.

[0044] The selected load R L ’ (Converted to the high-voltage side) When the size is 100kΩ, without installing an inductor, the output power is about 540W; after installing a designed 2000VA high-voltage compensation inductor, the output power is about 900W, and after connecting the high-voltage inductor, the output power of the loop increases.

[0045] It can be seen from the above embodiments that the present invention utilizes the compensation function of the high-voltage inductor t...

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Abstract

A 220KV single-circuit overhead transmission line insulate lightning conductor resonance energy taking method comprise that following steps: step S1, taking an induction voltage of the insulated lightning conductor as an energy take power source; 2, connecting a high-voltage inductor between that lightning protection wire and the step-down transformer, reduce the total impedance in the loop according to the compensation function of the high-voltage inductor, and increasing the energy take-off power. As that induction voltage of the insulate lightning protection wire is used as the power sourceof the energy taking device, a high-voltage inductor is connected between the lightning protection wire and the step-down transformer, and the total impedance in the loop is reduce by the compensation function of the high-voltage inductor, so that the energy taking power is increased.

Description

technical field [0001] The invention relates to the technical field of smart grids, in particular to a resonance energy harvesting method for an insulated lightning protection line of a single-circuit 220KV overhead transmission line. Background technique [0002] my country's power grid has the characteristics of wide coverage and long transmission line distance. High-voltage transmission lines are the arteries of the entire power transmission network, and their operating status determines the safety and stability of the entire power system. Once a fault occurs, it will cause a power outage on the entire line or even cause the disconnection of the regional power grid, which will not only directly affect the reliability of the power grid, but also would cause significant economic losses. Power transmission and transformation lines have been exposed to complex and changeable natural environments for a long time, variable climatic conditions (rain, snow, freezing, wind, etc.)...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J50/12H02J50/70
CPCH02J50/12H02J50/70
Inventor 郑跃胜夏开齐国伟吴文斌廖福旺舒胜文
Owner FUZHOU UNIV
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