{"id":{"repo_id":"vt","oai_identifier":"oai:vtechworks.lib.vt.edu:10919/42917"},"canonical_url":"https://search.dev.ndltd.org/etd/vt/oai:vtechworks.lib.vt.edu:10919/42917","repository":{"repo_id":"vt","name":"Virginia Tech","base_url":"https://vtechworks.lib.vt.edu/oai/request"},"display":{"title":"Modeling of open bank distribution transformer connections","abstract":"Distribution transformers are an essential part of any power distribution system. In order to thoroughly simulate and analyze such a system, accurate models must be developed that make use of readily available field data. In addition, unbalanced loading situations, which are encountered frequently in distribution transformer utilization, must be handled properly. These requirements form the basis for the modeling of the open-wye/open-delta and open-delta/open-delta distribution transformer connections. The Distribution Engineering Workstation (DEWorkstation), an Electric Power Research Institute (EPRI) software package, is the environment in which the open bank connections are modeled. In particular, a load flow analysis application, called Power Flow, provides the framework for all transformer connection modeling. This framework incorporates a method of tracing through the circuit to determine the voltages and currents on each side of the transformer connection. From theses parameters, the power rating of each set of paired windings can be determined. The accuracy of the open bank models developed in DEWorkstation is confirmed through comparison with more rigorous open-wye/open-delta and open-delta/open-delta distribution transformer models. Making use of transformer bank loading results from software developed by Pennsylvania Power and Light (PP&L), the open-wye/open-delta and open-delta/open-delta transformer connections are validated. Other transformer connections that could be verified using the results from PP&L are also presented.","abstract_html":"Distribution transformers are an essential part of any power distribution system. In order to thoroughly simulate and analyze such a system, accurate models must be developed that make use of readily available field data. In addition, unbalanced loading situations, which are encountered frequently in distribution transformer utilization, must be handled properly. These requirements form the basis for the modeling of the open-wye/open-delta and open-delta/open-delta distribution transformer connections. The Distribution Engineering Workstation (DEWorkstation), an Electric Power Research Institute (EPRI) software package, is the environment in which the open bank connections are modeled. In particular, a load flow analysis application, called Power Flow, provides the framework for all transformer connection modeling. This framework incorporates a method of tracing through the circuit to determine the voltages and currents on each side of the transformer connection. From theses parameters, the power rating of each set of paired windings can be determined. The accuracy of the open bank models developed in DEWorkstation is confirmed through comparison with more rigorous open-wye/open-delta and open-delta/open-delta distribution transformer models. Making use of transformer bank loading results from software developed by Pennsylvania Power and Light (PP&L), the open-wye/open-delta and open-delta/open-delta transformer connections are validated. Other transformer connections that could be verified using the results from PP&L are also presented.","abstract_has_math":false,"creators":["Lorber, Christa Kaye"],"institution":"Virginia Tech","degree_name":"Master of Science","degree_level":"masters","degree_discipline":"Electrical Engineering","degree_department":"Electrical Engineering","school":null,"contributors":[],"advisors":[],"committee_chairs":["Broadwater, Robert P."],"committee_members":["Rahman, Saifur","Liu, Yilu"],"year":1995,"date_issued":"1995-05-05","date_published":"1995-05-05","updated_at":"2026-07-22T22:20:26Z","subjects":["Software applications - open bank connections"],"languages":["en"],"rights":["In Copyright"],"rights_urls":["http://rightsstatements.org/vocab/InC/1.0/"],"identifier_entries":[{"key":"dc:identifier.other","label":"Dc Identifier Other","values":["etd-06082009-171138"],"render_values":[{"text":"etd-06082009-171138","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/10919/42917","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.committeechair","label":"Committee Chair","values":["Broadwater, Robert P."]},{"key":"dc:contributor.committeemember","label":"Committee Member","values":["Rahman, Saifur","Liu, Yilu"]},{"key":"dc:contributor.department","label":"Department","values":["Electrical Engineering"]},{"key":"dc:creator","label":"Author","values":["Lorber, Christa Kaye"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2014-03-14T21:37:11Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2014-03-14T21:37:11Z","2009-06-08"]},{"key":"dc:date.issued","label":"Date","values":["1995-05-05"]},{"key":"dc:publisher","label":"Institution","values":["Virginia Tech"]},{"key":"dc:type","label":"Dc Type","values":["Thesis"]},{"key":"dc:type.dcmitype","label":"Dc Type Dcmitype","values":["Text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Electrical Engineering"]},{"key":"thesis:degree_level","label":"Degree Level","values":["masters"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Master of Science"]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["Virginia Polytechnic Institute and State University"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Software applications - open bank connections"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language.iso","label":"Language (ISO)","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["In Copyright"]},{"key":"dc:rights.uri","label":"Rights URI","values":["http://rightsstatements.org/vocab/InC/1.0/"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.other","label":"Dc Identifier Other","values":["etd-06082009-171138"]},{"key":"dc:identifier.uri","label":"Identifier URI","values":["http://hdl.handle.net/10919/42917"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["Distribution transformers are an essential part of any power distribution system. In order to thoroughly simulate and analyze such a system, accurate models must be developed that make use of readily available field data. In addition, unbalanced loading situations, which are encountered frequently in distribution transformer utilization, must be handled properly. These requirements form the basis for the modeling of the open-wye/open-delta and open-delta/open-delta distribution transformer connections. The Distribution Engineering Workstation (DEWorkstation), an Electric Power Research Institute (EPRI) software package, is the environment in which the open bank connections are modeled. In particular, a load flow analysis application, called Power Flow, provides the framework for all transformer connection modeling. This framework incorporates a method of tracing through the circuit to determine the voltages and currents on each side of the transformer connection. From theses parameters, the power rating of each set of paired windings can be determined. The accuracy of the open bank models developed in DEWorkstation is confirmed through comparison with more rigorous open-wye/open-delta and open-delta/open-delta distribution transformer models. Making use of transformer bank loading results from software developed by Pennsylvania Power and Light (PP&L), the open-wye/open-delta and open-delta/open-delta transformer connections are validated. Other transformer connections that could be verified using the results from PP&L are also presented."]},{"key":"dc:description.degree","label":"Dc Description Degree","values":["Master of Science"]},{"key":"dc:format.medium","label":"Dc Format Medium","values":["BTD"]},{"key":"dc:format.mimetype","label":"Dc Format Mimetype","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Modeling of open bank distribution transformer connections"]}]}],"canonical_facts":{"dc:contributor.committeechair":["Broadwater, Robert P."],"dc:contributor.committeemember":["Rahman, Saifur","Liu, Yilu"],"dc:contributor.department":["Electrical Engineering"],"dc:creator":["Lorber, Christa Kaye"],"dc:date.accessioned":["2014-03-14T21:37:11Z"],"dc:date.available":["2014-03-14T21:37:11Z","2009-06-08"],"dc:date.issued":["1995-05-05"],"dc:description.abstract":["Distribution transformers are an essential part of any power distribution system. In order to thoroughly simulate and analyze such a system, accurate models must be developed that make use of readily available field data. In addition, unbalanced loading situations, which are encountered frequently in distribution transformer utilization, must be handled properly. These requirements form the basis for the modeling of the open-wye/open-delta and open-delta/open-delta distribution transformer connections. The Distribution Engineering Workstation (DEWorkstation), an Electric Power Research Institute (EPRI) software package, is the environment in which the open bank connections are modeled. In particular, a load flow analysis application, called Power Flow, provides the framework for all transformer connection modeling. This framework incorporates a method of tracing through the circuit to determine the voltages and currents on each side of the transformer connection. From theses parameters, the power rating of each set of paired windings can be determined. The accuracy of the open bank models developed in DEWorkstation is confirmed through comparison with more rigorous open-wye/open-delta and open-delta/open-delta distribution transformer models. Making use of transformer bank loading results from software developed by Pennsylvania Power and Light (PP&L), the open-wye/open-delta and open-delta/open-delta transformer connections are validated. 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