18kV and 40kHz high-frequency de-icing device and de-icing method thereof

An ice melting method, 18KV technology, applied in the direction of overhead installation, cable installation, electrical components, etc., to achieve the effect of being conducive to realization, reducing impact, and reducing transmission current

Inactive Publication Date: 2011-09-21
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

Some of these methods are still in the stage of theoretical research, and some have been proved to be effective in deicing through experiments but have not yet been put into practice.

Method used

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  • 18kV and 40kHz high-frequency de-icing device and de-icing method thereof
  • 18kV and 40kHz high-frequency de-icing device and de-icing method thereof
  • 18kV and 40kHz high-frequency de-icing device and de-icing method thereof

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Experimental program
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Embodiment Construction

[0045] The 18kV, 40kHz high-frequency ice-melting device is composed of an excitation source and a wave trap, which can be fixedly installed on a specific line or used in a mobile way. By adding a high-frequency excitation source in the center of the line and installing wave traps on both sides of the line, the high-frequency signal of the line is limited to the line that needs to be melted to prevent damage to other transmission lines and electrical equipment. A set of ice melting system needs 2 traps to achieve high frequency impedance matching.

[0046] Taking the line of Liangjiangkou Station-Tuqiao Station of Chenzhou Power Grid as an example, the transmission line is LGJ-240 / 100, and the total length of the line is 103KM. Unit frequency resistance R 0 =0.133W / km, unit power frequency reactance X 0 = 0.396W / km.

[0047] By applying 18kV, 40kHz excitation, the thermal power of about 50W / m can be obtained on the line, and the ice with a thickness of about 10mm can be mel...

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Abstract

The invention discloses an 18kV and 40kHz high-frequency de-icing device and an de-icing method thereof. The 18kV and 40kHz high-frequency de-icing device comprises an excitation source and notch filters, wherein the excitation source is connected in parallel with two parallel-connected notch filters and grounded respectively. By the device and the method, transmission current of a circuit can be reduced and the heating power can be increased; under the condition of no power failure, an effect of de-icing within a short time can be achieved; compared with the frequency 100kHz and the voltage 33kV in the high-frequency de-icing technology provided in the foreign country, the level of the frequency and the voltage of the excitation source in the 18kV and 40kHz high-frequency de-icing technology is reduced greatly, so the influence of high frequency on communication is lowered greatly; meanwhile, the implementation of the device is facilitated.

Description

technical field [0001] The invention belongs to a high-frequency ice-melting method for power transmission lines, in particular to an 18kV, 40kHz high-frequency ice-melting device and an ice-melting method thereof. Background technique [0002] The icing of transmission lines not only seriously affects the stable operation of the power grid, but also has an impact on the development of the entire national economy. Many countries in the world have conducted extensive and in-depth research on ice-covered transmission line ice melting technology, and many methods have been applied to the actual ice melting process and achieved certain results. [0003] According to different deicing mechanisms, more than 30 common deicing methods can be divided into three categories: thermal deicing, mechanical deicing and natural deicing. [0004] (1) thermal ice melting method: [0005] [0006] Table 1 [0007] Among the four methods listed in Table 1, two are the Joule effect to heat ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02G7/16
Inventor 周羽生陈佩瑶高小刚杨义胡鑫施方圆
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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