Title:
METHOD AND APPARATUS FOR SUPPRESSING IMPACT OF COMPENSATOR ON LINE DISTANCE PROTECTION
Document Type and Number:
WIPO Patent Application WO/2018/214864
Kind Code:
A1
Abstract:
Disclosed is a method and apparatus for suppressing the impact of a compensator on line distance protection. The method comprises: obtaining a first current of a line accessed by a compensator or series converters in the compensator, and a first voltage of a bus accessed by the compensator or the line accessed by the compensator; if the first current is greater than a preset current threshold and a duration is greater than a first preset time threshold, deactivating the series converters and series transformers; if the first voltage is less than or equal to a preset voltage threshold and duration is greater than a second preset time threshold set the output voltage of the series converters to zero, and if a second current of an element corresponding to the first current meets conditions which the first current needs to meet, deactivating the series converters and the series transformers; and otherwise, if a second voltage of the line corresponding to the first voltage is greater than the preset voltage threshold and a duration is greater than a third preset time threshold, canceling the setting of the output voltage of the series converters to zero and obtaining a first current.
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Inventors:
PAN LEI (CN)
TIAN JIE (CN)
DONG YUNLONG (CN)
LU YU (CN)
HUANG RUHAI (CN)
JIANG CHONGXUE (CN)
LU JIANG (CN)
ZHANG BAOSHUN (CN)
QIU DEFENG (CN)
XIE HUA (CN)
TIAN JIE (CN)
DONG YUNLONG (CN)
LU YU (CN)
HUANG RUHAI (CN)
JIANG CHONGXUE (CN)
LU JIANG (CN)
ZHANG BAOSHUN (CN)
QIU DEFENG (CN)
XIE HUA (CN)
Application Number:
PCT/CN2018/087794
Publication Date:
November 29, 2018
Filing Date:
May 22, 2018
Export Citation:
Assignee:
NR ELECTRIC CO LTD (CN)
NR ENGINEERING CO LTD (CN)
NR ENGINEERING CO LTD (CN)
International Classes:
H02H7/26
Foreign References:
| CN107026432A | 2017-08-08 | |||
| CN107240909A | 2017-10-10 | |||
| CN107069683A | 2017-08-18 | |||
| CN107240908A | 2017-10-10 | |||
| CN105826908A | 2016-08-03 | |||
| CN105207186A | 2015-12-30 | |||
| CN104967104A | 2015-10-07 | |||
| JPH0620566A | 1994-01-28 | |||
| CN201510732288A | 2015-11-02 | |||
| CN201610309848A | 2016-05-11 | |||
| CN201510371762A | 2015-06-30 | |||
| CN201510371647A | 2015-06-30 |
Other References:
ZHANG, YONG: "Unified Power Flow Controller and Its Effects on Distance Protection", MASTER THESIS, 15 August 2005 (2005-08-15), pages 1 - 56, XP009517575, ISSN: 1671-6779
See also references of EP 3618212A4
See also references of EP 3618212A4
Attorney, Agent or Firm:
NANJING JINGWEI PATENT & TRADEMARK AGENCY CO., LTD (CN)
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