Mobile power line DC ice-melting device

A transmission line, DC ice melting technology, applied in the installation of cables, electrical components, overhead installation, etc., can solve problems such as power grid load transfer, and achieve the effects of low device price, reduced device capacity, and simple structure

Active Publication Date: 2010-04-14
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to design a mobile DC deicing device for transmission lines in view of the backwardness of the existing technology and the defects of the above-mentioned AC deicing technology. The transmission line is treated with ice melting, so as to reduce the on-site switching operation and avoid the load transfer of the power grid

Method used

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  • Mobile power line DC ice-melting device
  • Mobile power line DC ice-melting device
  • Mobile power line DC ice-melting device

Examples

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Embodiment 1

[0023] Example 1: see figure 1 , a kind of mobile transmission line DC deicing device of this embodiment of the present invention, its series impedance 1 adopts the SL-1125 type produced by China Hubei Shaoxin Special Electric Co., Ltd., each phase is 0.5 ohm, three-phase oil-immersed iron core reactor.

[0024] The first diode valve group 21 and the second diode valve group 22, the third diode valve group 23, the fourth diode valve group 24, the fifth and second Both the pole tube valve group 25 and the sixth diode valve group 26 are ZPx2000-65 type rectifier tubes produced by China Zhuzhou National Engineering Research Center of Converter Technology, with a withstand voltage of 6500V and an average on-state current of 2000A. The negative pole of the first diode valve group 21 in the above assembly is connected in parallel with the negative pole of the second diode valve group 22 and the negative pole of the third diode valve group 23 to lead out the output terminal D; the f...

Embodiment 2

[0026] Embodiment 2: The series impedance 1 of this embodiment adopts the ZS-1125 / 0.5-3 type, 0.5 ohm per phase, three-phase oil-immersed iron core reactor produced by China Hengyang TBEA Hengyang Transformer Co., Ltd., and the others are the same as the embodiment 1.

[0027] The mobile transmission line DC deicing device of the present invention thus constituted has a good effect after trial production and trial production, fully meets the design requirements, and can provide a good solution for the deicing work after large-scale icing of the power grid.

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Abstract

The invention discloses a movable transmission line DC deicing device, which consists of a series resistor (1) and a three-phrase bridge type uncontrollable rectifier (2) which are connected serially.The three-phrase bridge type uncontrollable rectifier (2) consists of a first diode valve bank (21), a second diode valve bank (22), a third diode valve bank (23), a fourth diode valve bank (24), a fifth diode valve bank (25), and a sixth diode valve bank (26) which are connected electrically. When a transmission line is covered with ice, the device is accessed to a power grid by the series resistor 1 to convert three-phase alternating-current supply to a DC power supply and apply the DC power supply to the transmission line, and uses the heat generated by a conducting wire electrified to meltthe ice. The device has the advantages of meeting requirements for long-distance deicing, along with simple structure, small volume, light weight, convenient movable operation, low price and low secu rity risks.

Description

technical field [0001] The invention belongs to the technical field of electrical engineering, and in particular relates to a mobile DC deicing device for power transmission lines, which is suitable for carrying out DC deicing treatment on long-distance power transmission lines after ice coating, so as to avoid disconnection of power transmission lines after ice coating Even a tower collapse accident. Background technique [0002] In recent years, severe accidents of transmission line disconnection or even tower collapse due to icing have occurred frequently. For example, the power grid ice disaster that occurred in Hunan Province, China in January 2008 caused a large number of transmission lines to collapse and disconnect, causing direct economic losses of billions of yuan and seriously affecting the safe operation of the power grid and the normal life of the people. Therefore, it is very necessary to timely melt the ice when the transmission line forms ice, peel off or el...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02G7/16
Inventor 陆佳政李波方针张红先
Owner STATE GRID CORP OF CHINA
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