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AC line-feeding deicing connection plan for current-exchanging station

A converter station, AC line technology, applied in the direction of power transmission AC network, electrical components, cable installation, etc., can solve the problems of limited manpower, material and financial resources, and a lot of money for transformation

Inactive Publication Date: 2009-07-08
国网直流工程建设有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the lines that have been built, replacing the towers means spending a lot of money on the renovation and reinforcement of the old lines. The manpower, material and financial resources for the reconstruction are limited after all.

Method used

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  • AC line-feeding deicing connection plan for current-exchanging station
  • AC line-feeding deicing connection plan for current-exchanging station

Examples

Experimental program
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Effect test

Embodiment Construction

[0011] Aiming at the problem that there is no ice-melting measure for the AC incoming line of the converter station at present, the present invention proposes a practical converter wiring scheme for melting the ice of the AC incoming line of the converter station (see attached figure 1 , attached figure 2 ). First stop the operation mode of DC transmission, connect the two poles of the converter station to the back-to-back converter station wiring, one of the poles is used as a rectifier station, and the other pole is used as an inverter station, and the AC line is connected to the pole of the back-to-back converter unit line, which constitutes the back-to-back DC system ice-melting operation mode, the control protection system switches to the back-to-back DC control mode, unlocks the converter, the AC line will flow a DC current of the same size as the converter, and the ice-melting can be controlled by controlling the DC current current to meet the requirements of line mel...

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Abstract

A project practical method for thawing ice on an AC incoming line of a HVDC substation is characterized in that a back-to-back converter unit connection is composed of two poles of the HVDC substation; one pole is used as a rectifier, while the other pole is used as an inverter; an AC line is coupled in a pole line of the back-to-back converter unit, so that DC current of the same intensity flows through the AC line as well as the inverter for thawing the ice on the AC line. The experimental method can be used for thawing the ice on the AC incoming line of the HVDC substation. A built DC project can meet the ice-thawing requirement of thawing the ice on the AC incoming line of the HVDC substation through controlling and protecting system reconstruction; and the mode of the back-to-back ice-thawing operation can be added to a new DC project for thawing the ice on the AC incoming line of the HVDC substation.

Description

technical field [0001] The present invention relates to a practical method for melting the ice of the AC incoming line of the converter station in a direct current transmission project, and more specifically relates to a wiring scheme for melting the ice of the AC incoming line of the high-voltage direct current converter station. Each pole constitutes the wiring of the back-to-back converter unit, and the AC line is connected to the pole line of the back-to-back converter unit, then the AC line will flow a DC current of the same magnitude as the converter, which can melt the ice on the AC line. This wiring scheme can be used to melt the ice of the AC incoming line of the converter station of the HVDC power transmission. For the existing DC projects, the requirements for melting the ice of the AC line of the converter station can be met through the transformation of the control and protection system; Icing of incoming wires. Background technique [0002] In the current DC ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02G7/16H02J3/36
CPCY02E60/60
Inventor 殷威扬石岩刘宝宏张民
Owner 国网直流工程建设有限公司
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