VTechWorks staff will be away for the Thanksgiving holiday starting Wednesday afternoon, Nov. 25, through Sunday Nov. 29, and will not be replying to requests during this time. Thank you for your patience.

Show simple item record

dc.contributor.authorTania, Mutmainnaen_US
dc.date.accessioned2013-02-19T22:40:03Z
dc.date.available2013-02-19T22:40:03Z
dc.date.issued2013-01-21en_US
dc.identifier.othervt_gsexam:113en_US
dc.identifier.urihttp://hdl.handle.net/10919/19241
dc.description.abstractThe increasing demand for electricity over the last few decades has not been followed by adequate growth in electric infrastructure. As a result, the reliability and safety of the electric grids are facing tremendously growing pressure. Large blackouts in the recent past indicate that sustaining system reliability and integrity turns out to be more and more difficult due to reduced transmission capacity margins and increased stress on the system. Due to the heavy loading conditions that occur when the system is under stress, the protection systems are susceptible to mis-operation. It is under such severe situations that the network cannot afford to lose its critical elements like the main generation units and transmission corridors.

In addition to the slow but steady variations in the network structure over a long term, the grid also experiences drastic changes during the occurrence of a disturbance. One of the main reasons why protection relays mis-operate is due to the inability of the relays to adjust to the evolving network scenario. Such failures greatly compound the severity of the disturbance, while diminishing network integrity leading to catastrophic system-wide outages. With the advancement of Wide Area Measurement Systems (WAMS), it is now possible to redesign network protection schemes to make them more adaptive and thus improve the security of the system.

Often flagged for exacerbating the events leading to a blackout, the back-up distance protection relay scheme for transmission line protection and the loss-of-field relay scheme for generator unit protection can be greatly improved from an adaptability-oriented redesign. Protection schemes in general would benefit from a power re-distribution technique that helps predict generator outputs immediately after the occurrence of a contingency.
en_US
dc.format.mediumETDen_US
dc.publisherVirginia Techen_US
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectBack-up Distance Protectionen_US
dc.subjectSupervisory Controlen_US
dc.subjectAdaptive Loss-of-Field Protectionen_US
dc.subjectWide Area Measurement Systemen_US
dc.subjectGeneration Reen_US
dc.titleWide Area Measurement Applications for Improvement of Power System Protectionen_US
dc.typeDissertationen_US
dc.contributor.departmentElectrical and Computer Engineeringen_US
dc.description.degreePh. D.en_US
thesis.degree.namePh. D.en_US
thesis.degree.leveldoctoralen_US
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen_US
thesis.degree.disciplineElectrical Engineeringen_US
dc.contributor.committeechairDe La Reelopez, Jaimeen_US
dc.contributor.committeechairPhadke, Arun G.en_US
dc.contributor.committeememberCenteno, Virgilio A.en_US
dc.contributor.committeememberKohler, Werner E.en_US
dc.contributor.committeememberConners, Richard W.en_US


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record