Grounded HVDC grid line fault protection using rate of change of voltage and hybrid DC breakers

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dc.contributor.authorSneath, Jeremy
dc.contributor.examiningcommitteeGole, Aniruddha (Electrical and Computer Engineering) Leung, Carson (Computer Science) Jacobson, David (Electrical and Computer Engineering)en_US
dc.contributor.supervisorRajapakse, Athula (Electrical and Computer Engineering)en_US
dc.date.accessioned2014-09-02T18:50:21Z
dc.date.available2014-09-02T18:50:21Z
dc.date.issued2014-09-02
dc.degree.disciplineElectrical and Computer Engineeringen_US
dc.degree.levelMaster of Science (M.Sc.)en_US
dc.description.abstractDifferent HVDC grid types and the respective protection options are discussed. An earthed bi-pole HVDC grid was modeled in PSCAD, and using simulation results, the necessity of di/dt limiting inductors to contain the rise of fault currents within the capacity of current hybrid DC breakers is demonstrated. The impact of different inductor sizes on current rise was studied. A fault detection and localization scheme using the rate of change of voltage (ROCOV) measured at the line side of the di/dt limiting inductors is proposed. The protection system was modeled and tested under different fault types and locations. The results show that the proposed method of HVDC grid protection is feasible using the current hybrid DC breaker technology. A systematic procedure for setting the necessary protection threshold values is also demonstrated.en_US
dc.description.noteOctober 2014en_US
dc.identifier.urihttp://hdl.handle.net/1993/23939
dc.language.isoengen_US
dc.rightsopen accessen_US
dc.subjectHVDCen_US
dc.subjectGriden_US
dc.subjectProtectionen_US
dc.subjectROCOVen_US
dc.subjectBreakeren_US
dc.subjectDetectionen_US
dc.subjectPSCADen_US
dc.subjectBi-poleen_US
dc.subjectFaulten_US
dc.titleGrounded HVDC grid line fault protection using rate of change of voltage and hybrid DC breakersen_US
dc.typemaster thesisen_US
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