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Anti-icing wire protection and ice melting method for hybrid direct current transmission system

A technology of power transmission system and hybrid direct current, which is applied in the installation of cables, electrical components, overhead installation, etc., and can solve the problems of complex installation, large footprint, and high cost

Active Publication Date: 2019-03-01
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the ice-melting device requires a complete set of ice-melting equipment, including transformers, voltage and current transformers, converters, switch switches, control and protection devices, etc., which occupy a large area, are costly, and are relatively complicated to install. The above two methods still have room for improvement

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  • Anti-icing wire protection and ice melting method for hybrid direct current transmission system
  • Anti-icing wire protection and ice melting method for hybrid direct current transmission system
  • Anti-icing wire protection and ice melting method for hybrid direct current transmission system

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Embodiment Construction

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0028] Such as figure 1 as shown, figure 1 It is a hybrid DC transmission system, the rectification side is the side of the conventional DC converter valve, the rectification side is connected to the conventional DC transmission system, the inverter side is the side of the flexible DC converter valve, the inverter side is connected to the flexible DC transmission system, and the conventional The DC commutation side includes two grid commutation valve groups connec...

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Abstract

The invention discloses an anti-icing wire protection and ice melting method for a hybrid direct current transmission system; when the direct-current transmission line is subjected to anti-icing wireprotection and ice melting, a conventional direct current converter valve in a line of the hybrid direct current transmission system is enabled to be in a stop state; metal return line bypass switchesof the conventional direct-current side of the hybrid direct current power transmission system are closed; an optional flexible direct-current converter valve in the line of the hybrid direct currentpower transmission system is unlocked, and a flexible direct-current converter valve at the same pole of the unlocking flexible direct-current converter valve is short-circuited through the bypass ofa valve bank; and the rest of the flexible direct-current converter valves are stopped, and the metal return line bypass switches corresponding to the rest of the flexible direct-current converter valves are closed, so that ice melting of the power transmission line is realized.

Description

technical field [0001] The patent of the present invention relates to the field of direct current transmission in electric power systems, and more specifically, relates to a method and circuit for melting ice of a hybrid direct current transmission system. Background technique [0002] Among the various natural disasters suffered by the power system, ice disaster is one of the most serious threats to the power system. For the DC transmission system, the DC power usually transmitted in winter is small, and the current flowing through the DC transmission line is also smaller, and it is easy to be covered with ice when the ice disaster comes. Once large-scale icing occurs on the DC transmission line, ice flashes will occur at mild cases, and towers (poles) will collapse and disconnection will occur at severe cases, and the power transmission of the entire DC transmission system will be interrupted for a long time. On the other hand, the ground pole line in the DC transmission ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02G7/16
CPCH02G7/16
Inventor 饶宏黄伟煌许树楷李岩傅闯周月宾
Owner ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD
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