{"id":{"repo_id":"texas","oai_identifier":"oai:repositories.lib.utexas.edu:2152/129319"},"canonical_url":"https://search.dev.ndltd.org/etd/texas/oai:repositories.lib.utexas.edu:2152/129319","repository":{"repo_id":"texas","name":"University of Texas","base_url":"https://repositories.lib.utexas.edu/server/oai/request"},"display":{"title":"Modeling of industrial power distribution circuits for voltage sag and fault analysis","abstract":"This thesis uses the Electromagnetic Transients Program (EMTP) to simulate sensitive electrical loads during voltage sags. The study begins by discussing the modeling procedure for induction motors based on manufacturer datasheets. It then investigates and develops a 24-pulse variable frequency drive (VFD) model in EMTP. The functionality of the VFD model is evaluated by using a test feeder, with a focus on its control mechanisms. The VFD is controlled with the field-oriented control (FOC) method and tuning procedures are thoroughly discussed. Furthermore, a low-voltage ride-through (LVRT) model is designed to replicate the operational behavior of the VFDs being studied. The induction motor model is validated, with steady-state simulation and direct-line starting being documented in this thesis. The study progresses to modeling sensitive loads by incorporating an asynchronous machine (ASM) powered by the enhanced VFD under LVRT conditions. Finally, the grounding scheme is examined within an industrial test feeder to determine its impact on overall sag mitigation during fault conditions.","abstract_html":"This thesis uses the Electromagnetic Transients Program (EMTP) to simulate sensitive electrical loads during voltage sags. The study begins by discussing the modeling procedure for induction motors based on manufacturer datasheets. It then investigates and develops a 24-pulse variable frequency drive (VFD) model in EMTP. The functionality of the VFD model is evaluated by using a test feeder, with a focus on its control mechanisms. The VFD is controlled with the field-oriented control (FOC) method and tuning procedures are thoroughly discussed. Furthermore, a low-voltage ride-through (LVRT) model is designed to replicate the operational behavior of the VFDs being studied. The induction motor model is validated, with steady-state simulation and direct-line starting being documented in this thesis. The study progresses to modeling sensitive loads by incorporating an asynchronous machine (ASM) powered by the enhanced VFD under LVRT conditions. Finally, the grounding scheme is examined within an industrial test feeder to determine its impact on overall sag mitigation during fault conditions.","abstract_has_math":false,"creators":["Chong, Moises Antonio"],"institution":"The University of Texas at Austin","degree_name":"Master of Science in Engineering","degree_level":null,"degree_discipline":"Electrical and Computer Engineering","degree_department":null,"school":null,"contributors":[],"advisors":["Santoso, Surya"],"committee_chairs":[],"committee_members":["Johnson, Brian"],"year":2024,"date_issued":"2024-05","date_published":"2024-05","updated_at":"2026-07-24T05:01:12Z","subjects":["Distribution circuits","Induction motors","Electromagnetic Transients Program (EMTP)","Low-voltage ride-through","Industrial power system","Variable frequency drive","Sensitive electrical loads","Grounding analysis"],"languages":["English"],"rights":[],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["https://doi.org/10.26153/tsw/55825"],"render_values":[{"text":"https://doi.org/10.26153/tsw/55825","href":"https://doi.org/10.26153/tsw/55825","code":true}]}]},"links":{"outbound_url":"https://hdl.handle.net/2152/129319","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["Santoso, Surya"]},{"key":"dc:contributor.committeemember","label":"Committee Member","values":["Johnson, Brian"]},{"key":"dc:creator","label":"Author","values":["Chong, Moises Antonio"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2024-10-25T23:53:48Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2024-10-25T23:53:48Z"]},{"key":"dc:date.issued","label":"Date","values":["2024-05"]},{"key":"dc:type","label":"Dc Type","values":["Thesis"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Electrical and Computer Engineering"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Master of Science in Engineering"]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["The University of Texas at Austin"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Distribution circuits","Induction motors","Electromagnetic Transients Program (EMTP)","Low-voltage ride-through","Industrial power system","Variable frequency drive","Sensitive electrical loads","Grounding analysis"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language.iso","label":"Language (ISO)","values":["English"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["https://hdl.handle.net/2152/129319","https://doi.org/10.26153/tsw/55825"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["This thesis uses the Electromagnetic Transients Program (EMTP) to simulate sensitive electrical loads during voltage sags. The study begins by discussing the modeling procedure for induction motors based on manufacturer datasheets. It then investigates and develops a 24-pulse variable frequency drive (VFD) model in EMTP. The functionality of the VFD model is evaluated by using a test feeder, with a focus on its control mechanisms. The VFD is controlled with the field-oriented control (FOC) method and tuning procedures are thoroughly discussed. Furthermore, a low-voltage ride-through (LVRT) model is designed to replicate the operational behavior of the VFDs being studied. The induction motor model is validated, with steady-state simulation and direct-line starting being documented in this thesis. The study progresses to modeling sensitive loads by incorporating an asynchronous machine (ASM) powered by the enhanced VFD under LVRT conditions. Finally, the grounding scheme is examined within an industrial test feeder to determine its impact on overall sag mitigation during fault conditions."]},{"key":"dc:format.mimetype","label":"Dc Format Mimetype","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Modeling of industrial power distribution circuits for voltage sag and fault analysis"]}]}],"canonical_facts":{"dc:contributor.advisor":["Santoso, Surya"],"dc:contributor.committeemember":["Johnson, Brian"],"dc:creator":["Chong, Moises Antonio"],"dc:date.accessioned":["2024-10-25T23:53:48Z"],"dc:date.available":["2024-10-25T23:53:48Z"],"dc:date.issued":["2024-05"],"dc:description.abstract":["This thesis uses the Electromagnetic Transients Program (EMTP) to simulate sensitive electrical loads during voltage sags. The study begins by discussing the modeling procedure for induction motors based on manufacturer datasheets. It then investigates and develops a 24-pulse variable frequency drive (VFD) model in EMTP. The functionality of the VFD model is evaluated by using a test feeder, with a focus on its control mechanisms. The VFD is controlled with the field-oriented control (FOC) method and tuning procedures are thoroughly discussed. Furthermore, a low-voltage ride-through (LVRT) model is designed to replicate the operational behavior of the VFDs being studied. The induction motor model is validated, with steady-state simulation and direct-line starting being documented in this thesis. The study progresses to modeling sensitive loads by incorporating an asynchronous machine (ASM) powered by the enhanced VFD under LVRT conditions. Finally, the grounding scheme is examined within an industrial test feeder to determine its impact on overall sag mitigation during fault conditions."],"dc:format.mimetype":["application/pdf"],"dc:identifier.uri":["https://hdl.handle.net/2152/129319","https://doi.org/10.26153/tsw/55825"],"dc:language.iso":["English"],"dc:subject":["Distribution circuits","Induction motors","Electromagnetic Transients Program (EMTP)","Low-voltage ride-through","Industrial power system","Variable frequency drive","Sensitive electrical loads","Grounding analysis"],"dc:title":["Modeling of industrial power distribution circuits for voltage sag and fault analysis"],"dc:type":["Thesis"],"thesis:degree_discipline":["Electrical and Computer Engineering"],"thesis:degree_name":["Master of Science in Engineering"],"thesis:institution_name":["The University of Texas at Austin"]},"updated_at":"2026-07-24T05:01:12Z"}