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Impact ice melting method based on skin effect

A skin effect and ice-melting technology, which is applied in cable installation, electrical components, overhead installation, etc., can solve the problems of affecting the life of transmission lines, poor economy, and low ice-melting efficiency

Inactive Publication Date: 2015-08-12
YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The purpose of the present invention is to propose a fast, efficient and economical deicing method in view of the fact that the deicing efficiency of power transmission lines is not high, the economy is poor, the heating is uneven during deicing, and the life of power transmission lines is affected. The deicing method of the transmission line realizes the rapid and efficient deicing of the transmission line, so as to deal with the icing defect of the transmission line

Method used

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  • Impact ice melting method based on skin effect
  • Impact ice melting method based on skin effect
  • Impact ice melting method based on skin effect

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Embodiment Construction

[0024] An impact ice-melting system utilizing the skin effect, the invention uses a line connection device to connect a power transmission line, the line connection device is connected to an inrush current generator, and the inrush current generator is connected to a high-power current generator; wherein,

[0025] The output voltage of the impulse current generating device is not less than 14kV and not greater than 28kV, the peak value of the instantaneous current of the output current is greater than 2000A and the average value is greater than 1000A, the wave head time of the output waveform is less than 1ms and the impact duration is not less than 100ms; and the device is based on The impulse current generating device based on the BJT principle, the main frequency band of the output waveform of the device should be in the range of 100kHz to 500kHz;

[0026] The capacity of the high-power current generator should be greater than 30MW, and a smoothing reactor should be installe...

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Abstract

The invention belongs to the field of power equipment ice melting, and relates to an impact ice melting method based on a skin effect. According to the method, through line impacting, ice on a transmission line is melted based on the heat effect of current. As most of the charge flows on the surface of a conductor and an iced layer of a wire in the transmission process of high-frequency wave, the resistance of the conductor is increased, and the power loss and heat are increased. Compared with other ice melting methods, the heating efficiency is higher for ice melting by the ice melting method of the invention. Ice on a high-voltage line can be melted quickly and safely.

Description

technical field [0001] The invention relates to an impact ice-melting method utilizing the skin effect. Background technique [0002] Transmission lines play the role of power transmission in the power system and are one of the important components of power equipment. The transmission line is used to create conditions for the transmission of electromagnetic energy along the direction of the transmission line during normal operation, so as to achieve the purpose of energy transmission. Therefore, the normal operation of the transmission line is of great significance to the stability of the power system. [0003] In low-temperature, rainy and snowy weather, transmission lines are prone to icing on the surface of conductors formed by water vapor condensation due to high humidity, which will lead to freezing disasters in power systems. [0004] After the transmission line is covered with ice, the tension on both sides of the transmission tower will be unbalanced, resulting in ...

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Application Information

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IPC IPC(8): H02G7/16
CPCH02G7/16
Inventor 李振超王科方勇周仿荣钟建明翟兵董伟
Owner YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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