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Title:
VOLTAGE SOURCE CONVERTER UNIT AND ONLINE INPUT METHOD, AND VOLTAGE SOURCE CONVERTER VALVE
Document Type and Number:
WIPO Patent Application WO/2021/047460
Kind Code:
A1
Abstract:
The present application relates to an online input method of a voltage source converter unit. The voltage source converter unit comprises a voltage source converter and a bypass switch connected to a direct current side of a voltage source converter in parallel, wherein the bypass switch is in a closed state before the voltage source converter unit is inputted. The method comprises: superposing a harmonic voltage on a direct-current voltage reference value of the voltage source converter; and when a current flowing through the bypass switch has a zero crossing point satisfying a preset requirement, turning off the bypass switch.

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Inventors:
LU JIANG (CN)
DONG YUNLONG (CN)
HUANG RUHAI (CN)
QIU DEFENG (CN)
LU YU (CN)
TIAN JIE (CN)
HU ZHAOQING (CN)
ZHANG QINGWU (CN)
ZHANG JUNJUN (CN)
Application Number:
PCT/CN2020/113656
Publication Date:
March 18, 2021
Filing Date:
September 06, 2020
Export Citation:
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Assignee:
NR ELECTRIC CO LTD (CN)
NR ENGINEERING CO LTD (CN)
International Classes:
H02J3/36
Domestic Patent References:
WO2019109271A12019-06-13
Foreign References:
CN110601249A2019-12-20
CN109155598A2019-01-04
CN109155598A2019-01-04
CN107732954A2018-02-23
CN107732954A2018-02-23
CN108092240A2018-05-29
Attorney, Agent or Firm:
BEIJING LAWSING IP FIRM (CN)
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