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Title:
DIRECT-CURRENT FAULT RIDE-THROUGH METHOD AND COMPUTER STORAGE MEDIUM
Document Type and Number:
WIPO Patent Application WO/2018/040466
Kind Code:
A1
Abstract:
A direct-current fault ride-through method, wherein same is applied to a hybrid multi-terminal high-voltage direct-current transmission system. The hybrid multi-terminal high-voltage direct-current transmission system comprises at least two line commutated converter (LCC) type converter stations and at least one full-bridge modular multilevel converter (FB-MMC) type converter station. The method comprises: when a direct-current fault signal is detected, forcing an LCC type rectifier to perform a phase shift, so as to rapidly inhibit a fault current, with the LCC type rectifier being a converter in the LCC type converter stations for rectification; switching an FB-MMC type converter to a direct-current control mode, the FB-MMC type converter being a converter in the FB-MMC type converter station; after it is detected that the direct-current fault signal disappears, detecting a stable running signal of the LCC type rectifier; and after the stable running signal is detected, switching the FB-MMC type converter to be in an active power mode.

Inventors:
PENG ZHONG (CN)
LI SHAOHUA (CN)
LI TAI (CN)
JING XUEJI (CN)
SU YUN (CN)
ZHOU JINPING (CN)
ZHAO JING (CN)
SU JINGUO (CN)
HU YONGCHANG (CN)
LI YANMEI (CN)
XU LIUJIE (CN)
CHEN XIAOMIN (CN)
Application Number:
PCT/CN2017/070423
Publication Date:
March 08, 2018
Filing Date:
January 06, 2017
Export Citation:
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Assignee:
XJ GROUP CORP (CN)
XJ ELECTRIC CO LTD (CN)
STATE GRID CORP CHINA (CN)
International Classes:
H02J3/36
Foreign References:
CN103997033A2014-08-20
CN104362616A2015-02-18
CN105071425A2015-11-18
US20150035371A12015-02-05
US20150256094A12015-09-10
Attorney, Agent or Firm:
CHINA PAT INTELLECTUAL PROPERTY OFFICE (CN)
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