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Interrupting chamber, HVDC bypass interruptor and HVDC-conversion substation with such a chamber

A kind of arc, hollow tube technology, used in high-voltage air circuit breakers, circuits, electrical switches and other directions

Inactive Publication Date: 2014-11-12
ALSTOM TECH LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0026] The disadvantage of said patent is that the position of the insulator 10 relative to the hollow tube 8 is such that the minimum flow cross-section of the blown gas is at the end of the tulip 9
There is thus a major risk that the gas is at a low density and therefore the dielectric strength is lower at the transient recovery voltage in the region at the end of the arcing contact, which is the region where the steepest dielectric gradient occurs

Method used

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  • Interrupting chamber, HVDC bypass interruptor and HVDC-conversion substation with such a chamber
  • Interrupting chamber, HVDC bypass interruptor and HVDC-conversion substation with such a chamber
  • Interrupting chamber, HVDC bypass interruptor and HVDC-conversion substation with such a chamber

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Embodiment Construction

[0056] It may be repeated here that the terms "upstream" and "downstream" are to be understood relative to the direction of flow of the blown gas used to interrupt the arc.

[0057] Therefore, during any operation of disconnecting an interrupter having an interrupting chamber within the scope of the present invention, Figures 2A to 2C The upstream end of the blown jet in appears in volume V3, and the blowout occurs towards the downstream side (that is, from right to left).

[0058] Referring to the arcing contact 3, the hollow tube 30 is upstream of a constriction 304 of the gas flow cross-section, which is itself in a wider portion 305 immediately upstream of the real contact portion 311 (contact portion proper) upstream.

[0059] The respective gas flow cross-sections S1 , S2 and S3 of the actual contact portion 31 , of the constriction 304 and of the wider portion 305 are the cross-sections through which the blown gas flows.

[0060] Figure 2B with 2C The interrupting...

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Abstract

The chamber (1) has a tubular shaped arc blast isolating nozzle (5) extending along a longitudinal axis (XX'). A movable contact (3) includes a hollow inner tube (30) whose end is connected to a contact portion (31) of the movable contact, where arc blowing is entirely realized inside of the hollow tube along the longitudinal axis of the chamber. A neck (304) is provided in upstream of the contact portion for passage of gas. A release portion (305) is provided between the neck and the contact portion for passage of gas. An independent claim is also included a high-voltage direct-current conversion substation comprising a thyristor through which opening of a loading valve is realized.

Description

technical field [0001] The invention relates to an interruption chamber. [0002] More specifically, it concerns the interruption of high voltage direct current (HVDC). [0003] It involves interrupting the blowing of gas in the chamber. [0004] More specifically, it applies to the construction of HVDC bypass interrupters, as well as their integration into HVDC converter substations. Background technique [0005] The purpose of an HVDC converter substation is to convert direct current at high voltage (typically greater than 200 kilovolts (kV) DC) to alternating current also at high voltage. [0006] One architecture of an HVDC transmission system utilizing multiple HVDC substations is described eg in patent document WO 2007 / 084041. The system described therein comprises two substations 2 and 3 connected to each other by a high voltage power line 10 and a ground return line 11 . Each substation 2 or 3 comprises a plurality of HVDC bypass interrupters 12 , 13 or 14 , 15 ....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H33/91H02J3/36
CPCH01H33/7046H01H33/91H01H2033/908H01H2033/907
Inventor 斯哈伯沃夫冈
Owner ALSTOM TECH LTD
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