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Flexible direct-current transmission converter valve bridge arm damper short circuit current test device and method

A technology of flexible DC transmission and short-circuit current, which is applied in the direction of measuring devices, instruments, and measuring electronics, and can solve the problems of short-circuit current performance testing of converter valves for flexible DC transmission that have not been seen before.

Inactive Publication Date: 2016-10-12
XJ ELECTRIC +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there is no method and device for short-circuit current performance testing of flexible HVDC converter valves with bridge arm dampers at home and abroad

Method used

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  • Flexible direct-current transmission converter valve bridge arm damper short circuit current test device and method
  • Flexible direct-current transmission converter valve bridge arm damper short circuit current test device and method

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Experimental program
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Embodiment Construction

[0018] The present invention will be further described below in conjunction with specific embodiments.

[0019] The test circuit for short-circuit fault characteristics test of the bridge arm damper of the flexible HVDC converter valve is as follows: figure 1 As shown, the test device includes: charger unit, LC discharge unit, short-circuit auxiliary control valve Vsu, reverse auxiliary valve Da; the charger unit charges the capacitor Cs connected to the LC discharge unit), the capacitor Cs of the LC discharge unit, and the reactor Ls (which can also be a reactor group) is connected in series with the short-circuit auxiliary control valve Vsu, and the series circuit formed is used to connect the test valve OT; the reverse auxiliary valve Da and the capacitor Cs (which can also be a capacitor group) in antiparallel.

[0020] The charger AT is composed of a three-phase automatic voltage regulation and transformation device, and provides constant current continuous charging for ...

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Abstract

The invention relates to a flexible direct-current transmission converter valve bridge arm damper short circuit current test device and method. The test device comprises a charger unit, an LC discharge unit, a short-circuit auxiliary control valve (Vsu) and a reverse auxiliary valve (Da). The charger unit is in charging connection with the capacitor (Cs) of the LC discharge unit. The capacitor (Cs) of the LC discharge unit and a reactor (Ls) are connected in series with the short-circuit auxiliary control valve (Vsu) to form a series loop which is connected with a test object valve (OT). The reverse auxiliary valve (Da) is reversely connected in parallel with the capacitor (Cs). According to the invention, the circuit and the control method are conveniently realized, and have the advantages of simple control and low device cost.

Description

technical field [0001] The invention relates to the field of flexible direct current transmission, and more specifically relates to a short-circuit current test device and method for a bridge arm damper of a flexible direct current transmission converter valve. Background technique [0002] Flexible DC transmission is an important equipment for building smart grids. Compared with traditional DC transmission methods, flexible DC transmission has strong advantages in island power supply, urban distribution network expansion and reconstruction, AC system interconnection, and large-scale wind farm grid connection. It is a strategic choice to change the development pattern of large power grids. Compared with AC transmission, the advantages of flexible DC transmission are mainly reflected in long-distance power transmission, new energy consumption, and cost control. More importantly, flexible direct current transmission can carry clean energy such as wind energy and solar energy ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00
CPCG01R31/00
Inventor 姚为正张建李娟常忠廷张坤段艳丽赵岩徐涛
Owner XJ ELECTRIC