The Applicability of Traditional Protection Methods to Lines Emanating from VSC-HVDC Interconnectors and a Novel Protection Principle

Shimin Xue, Jingyue Yang, Yanxia Chen, Cunping Wang, Zhe Shi, Miao Cui and Botong Li
Additional contact information
Shimin Xue: Key Laboratory of Smart Grid of Ministry of Education, Tianjin University, Tianjin 300072, China
Jingyue Yang: Key Laboratory of Smart Grid of Ministry of Education, Tianjin University, Tianjin 300072, China
Yanxia Chen: Beijing Electric Power Corporation, Beijing 100075, China
Cunping Wang: Beijing Electric Power Corporation, Beijing 100075, China
Zhe Shi: Key Laboratory of Smart Grid of Ministry of Education, Tianjin University, Tianjin 300072, China
Miao Cui: Key Laboratory of Smart Grid of Ministry of Education, Tianjin University, Tianjin 300072, China
Botong Li: Key Laboratory of Smart Grid of Ministry of Education, Tianjin University, Tianjin 300072, China

Energies, 2016, vol. 9, issue 6, 1-27

Abstract: Voltage source converter (VSC)-based high voltage direct current (VSC-HVDC) interconnectors can realize accurate and fast control of power transmission among AC networks, and provide emergency power support for AC networks. VSC-HVDC interconnectors bring exclusive fault characteristics to AC networks, thus influencing the performance of traditional protections. Since fault characteristics are related to the control schemes of interconnectors, a fault ride-through (FRT) strategy which is applicable to the interconnector operating characteristic of working in four quadrants and capable of eliminating negative-sequence currents under unbalanced fault conditions is proposed first. Then, the additional terms of measured impedances of distance relays caused by fault resistances are derived using a symmetrical component method. Theoretical analysis shows the output currents of interconnectors are controllable after faults, which may cause malfunctions in distance protections installed on lines emanating from interconnectors under the effect of fault resistances. Pilot protection is also inapplicable to lines emanating from interconnectors. Furthermore, a novel pilot protection principle based on the ratio between phase currents and the ratio between negative-sequence currents flowing through both sides is proposed for lines emanating from the interconnectors whose control scheme aims at eliminating negative-sequence currents. The validity of theoretical analysis and the protection principle is verified by PSCAD/EMTDC simulations.

Keywords: VSC-HVDC interconnector; fault ride through (FRT); distance protection; pilot protection; fault resistance (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2016
References: View complete reference list from CitEc
Citations: View citations in EconPapers (4)

Downloads: (external link)
https://www.mdpi.com/1996-1073/9/6/400/pdf (application/pdf)
https://www.mdpi.com/1996-1073/9/6/400/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:9:y:2016:i:6:p:400-:d:70786

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().