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Fault Location Identification for a VSC-HVDC System with a Long Hybrid Transmission Medium

Al Hassan, Hashim A (2014) Fault Location Identification for a VSC-HVDC System with a Long Hybrid Transmission Medium. Master's Thesis, University of Pittsburgh. (Unpublished)

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Electrical energy transmission technologies are evolving as the need for sustainable energy resources continues to increase. HVDC transmission systems are becoming more prominent in power system design and operation, due to their superior performance in transmitting large amounts of power over long distances, which is needed in applications such as offshore wind farm developments. Research activities for HVDC systems are being pursuit to further improve their operation, reliability, quality, and costs. One particular aspect of improving HVDC systems is the efficient and economic maintenance of the system during post-disturbance conditions, which makes the problem of identifying the exact fault location on the line a critical issue. Fault location can be determined by using fault locators, which rely on sending a signal and using the reflected wave of that signal to determine the exact fault location. However, fault locators may cause further damage to the line and lack the ability to locate temporary faults. Locating temporary faults could be useful in determining weak points of the system, in order to do preventative maintenance, which improves the reliability of the system. Therefore, the technique of locating faults using fault transient data has emerged. Also, fault locators lack the ability to locate faults in a hybrid DC line system, where the transmission medium consists of segments of both underground cables and overhead lines, when using only terminal measurements. Therefore, solving the fault location problem utilizing transient data recorded at the terminals in systems of two and three different transmission medium segments is investigated in this thesis for an HVDC system with voltage source converters (VSC), as a means to demonstrate improved post-disturbance efficiency.


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Item Type: University of Pittsburgh ETD
Status: Unpublished
CreatorsEmailPitt UsernameORCID
Al Hassan, Hashim
ETD Committee:
TitleMemberEmail AddressPitt UsernameORCID
Thesis AdvisorReed, Gregorygfr3@pitt.eduGFR3
Committee MemberMcDermott, Thomastem42@pitt.eduTEM42
Committee MemberMao, Zhi-Hongzhm4@pitt.eduZHM4
Date: 16 June 2014
Date Type: Publication
Defense Date: 3 March 2014
Approval Date: 16 June 2014
Submission Date: 4 March 2014
Access Restriction: No restriction; Release the ETD for access worldwide immediately.
Number of Pages: 100
Institution: University of Pittsburgh
Schools and Programs: Swanson School of Engineering > Electrical Engineering
Degree: MS - Master of Science
Thesis Type: Master's Thesis
Refereed: Yes
Uncontrolled Keywords: Fault Location, Traveling Wave Theory, VSC-HVDC Faults,
Date Deposited: 16 Jun 2014 17:49
Last Modified: 15 Nov 2016 14:17


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