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Parallel monopole metallic loop ice melting operation wiring scheme for inverter

A technology for running wiring and metal loops, 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: 2009-03-25
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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  • Parallel monopole metallic loop ice melting operation wiring scheme for inverter
  • Parallel monopole metallic loop ice melting operation wiring scheme for inverter

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Experimental program
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Effect test

Embodiment Construction

[0011] Aiming at the problem that there is no ice-melting measure for the DC line of the DC project at present, the present invention proposes a practical wiring scheme for the parallel connection of the single-pole metal circuit of the converter used in the high-voltage DC project (see the attached figure 1 , accompanying drawing 2).

[0012] When the DC line needs to melt ice, the normal DC transmission operation mode is first stopped, and two 6-pulse converters with 2 poles in each end of the high-voltage DC converter station are used to form two 6-pulse converters in parallel (one pole Y / The Y converter and the Y / Δ converter of the other pole are connected in parallel) single-pole metal circuit wiring scheme, through the parallel connection of the converters, the DC current in the DC line is increased to meet the requirements of melting the ice on the DC line. With this wiring scheme, it can operate at 1 / 2 of the rated DC voltage and provide a current more than twice the ...

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PUM

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Abstract

A project practical running connection proposal for melting coated ice on a direct current line in a high-voltage direct current transmission project is characterized in that by utilizing a single-pole metallic return circuit connection proposal that a six-pulse converter with two poles at each end of high-voltage direct current converter station forms the parallel connection between two six-pulse converters (a Y / Y converter at one pole and a and Y / Delta converter at the other pole are connected in parallel), direct current in the direct current line is increased through the parallel connection between the converters, so as to satisfy the requirement for melting the coated ice on the direct current line. The connection proposal can be used for melting the ice on a direct current inlet line at one pole of a single 12-pluse high-voltage direct current transmission converter station.

Description

technical field [0001] The invention relates to a practical operation wiring scheme for melting the ice coating of DC lines in a high-voltage direct current transmission project. Parallel connection of six pulsation converters (Y / Y converter of one pole and Y / Δ converter of the other pole in parallel) single-pole metal circuit wiring scheme, through parallel connection of converters, the DC current in the DC line is increased, Reach the requirement of melting DC line icing. This wiring scheme can be used for melting ice of DC lines in HVDC transmission projects with single 12 pulses per pole. Background technique [0002] In the current DC transmission project, the DC transmission line may freeze when the rain and snow are severe in winter, and the weight of the DC line and the transmission tower will greatly increase. In the case of severe icing, the pressure on the lines and towers exceeds the design limit, and there will be catastrophic consequences such as line interru...

Claims

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Application Information

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IPC IPC(8): H02G7/16H02J3/36
CPCY02E60/60
Inventor 马为民石岩张民刘宝宏
Owner 国网直流工程建设有限公司