Title:
METHOD AND APPARATUS FOR HANDLING DIRECT-CURRENT SIDE LINE FAULT OF VOLTAGE SOURCE CONVERTER
Document Type and Number:
WIPO Patent Application WO/2022/166867
Kind Code:
A1
Abstract:
The present application provides a method and apparatus for handling a direct-current side line fault of a voltage source converter, the voltage source converter being provided at a rectification end or an inversion end of any one direct-current electrode in a direct-current power transmission system, the rectification end and the inversion end being connected by means of a direct-current line. The method for handling a fault comprises: acquiring a normal value of a direct-current voltage reference value of the voltage source converter; setting a direct-current current limit target value of the voltage source converter; on the basis of a direct-current current measurement value and the direct-current current limit target value, acquiring a direct-current current limit control output value; on the basis of the normal value of the direct-current voltage reference value and the direct-current current limit control output value, setting a direct-current voltage reference value of the voltage source converter; once a direct-current side line fault is detected, setting the direct-current current limit target value to be zero; and in response to the end of de-ionization, making the direct-current voltage reference value of the voltage source converter climb, and changing the direct-current current limit target value of the voltage source converter.
Inventors:
LU JIANG (CN)
DONG YUNLONG (CN)
YU XIANG (CN)
YANG JIANMING (CN)
WANG YANGZHENG (CN)
LU YU (CN)
TIAN JIE (CN)
LI HAIYING (CN)
QIU DEFENG (CN)
HUANG RUHAI (CN)
DONG YUNLONG (CN)
YU XIANG (CN)
YANG JIANMING (CN)
WANG YANGZHENG (CN)
LU YU (CN)
TIAN JIE (CN)
LI HAIYING (CN)
QIU DEFENG (CN)
HUANG RUHAI (CN)
Application Number:
PCT/CN2022/074899
Publication Date:
August 11, 2022
Filing Date:
January 29, 2022
Export Citation:
Assignee:
NR ELECTRIC CO LTD (CN)
NR ENGINEERING CO LTD (CN)
NR ENGINEERING CO LTD (CN)
International Classes:
H02H7/26; H02J3/36
Foreign References:
| CN111817269A | 2020-10-23 | |||
| CN110350567A | 2019-10-18 | |||
| CN106329560A | 2017-01-11 | |||
| EP3001552A1 | 2016-03-30 |
Other References:
LIU JIAN, TAI NENGLING, FAN CHUNJU, ZHENG XIAODONG, TANG YUEZHONG: "Fault Current Limitation and Analysis of Current Limiting Characteristic for Multi-terminal VSC-HVDC DC Lines", PROCEEDINGS OF THE CSEE, ZHONGGUO DIANJI GONGCHENG XUEHUI, CN, vol. 36, no. 19, 5 October 2016 (2016-10-05), CN , pages 5122 - 5133, XP055956775, ISSN: 0258-8013, DOI: 10.13334/j.0258-8013.pcsee.151236
LI SHAOHUA ET AL.: "Optimal Design for Hybrid MMC and Its DC Fault Ride-Through Strategy", PROCEEDINGS OF THE CSEE, vol. 36, no. 7, 2016, pages 1849 - 1858
LI SHAOHUA ET AL.: "Optimal Design for Hybrid MMC and Its DC Fault Ride-Through Strategy", PROCEEDINGS OF THE CSEE, vol. 36, no. 7, 2016, pages 1849 - 1858
Attorney, Agent or Firm:
BEIJING LAWSING IP FIRM (CN)
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