Investigation of protection problems due to geomagnetically induced currents

dc.contributor.authorJayasinghe, Rohitha Prashaden_US
dc.date.accessioned2007-05-15T15:15:41Z
dc.date.available2007-05-15T15:15:41Z
dc.date.issued1996-10-01T00:00:00Zen_US
dc.degree.disciplineElectrical and Computer Engineeringen_US
dc.degree.levelDoctor of Philosophy (Ph.D.)en_US
dc.description.abstractGeomagnetically Induced Currents (GIC), flowing in power systems during Solar Magnetic Disturbances (SMD), can cause severe offset saturation of power system transformers. Continuous saturation of transformers can result in transformer overheating, and cause harmon c currents to be injected into the system. Relay and protection systems are affected by harmonic currents passing through the system. A considerable amount of study has been done using analog and/or digital simulations of transformer half-cycle saturation to predict the transformer response to DC excitation. These methods used simplified transformer core models to represent the excitation-flux relationships. This thesis includes the development of an accurate transformer core model. The accuracy of the model is validated by comparing the recorded waveforms during GIC events with the simulated waveforms using the model. Then the model is used to investigate the other system quantities at different GIC conditions. As well, the performance of several protection schemes under GIC are evaluated. The study is performed using an electromagnetic transients simulation program.en_US
dc.format.extent6981604 bytes
dc.format.extent184 bytes
dc.format.mimetypeapplication/pdf
dc.format.mimetypetext/plain
dc.identifier.urihttp://hdl.handle.net/1993/749
dc.language.isoengen_US
dc.rightsopen accessen_US
dc.titleInvestigation of protection problems due to geomagnetically induced currentsen_US
dc.typedoctoral thesisen_US
Files
Original bundle
Now showing 1 - 1 of 1
Loading...
Thumbnail Image
Name:
nq23614.pdf
Size:
6.66 MB
Format:
Adobe Portable Document Format
Description:
License bundle
Now showing 1 - 1 of 1
Loading...
Thumbnail Image
Name:
license.txt
Size:
184 B
Format:
Plain Text
Description: