{"id":{"repo_id":"uoit","oai_identifier":"oai:ontariotechu.scholaris.ca:10155/1266"},"canonical_url":"https://search.dev.ndltd.org/etd/uoit/oai:ontariotechu.scholaris.ca:10155/1266","repository":{"repo_id":"uoit","name":"Ontario Institute of Technology","base_url":"https://ontariotechu.scholaris.ca/server/oai/request"},"display":{"title":"Harmonic emissions assessment for common DC and AC electric vehicle charging station architectures","abstract":"Future transportation needs are going to be met by Electric Vehicles (EVs) because of global pollution by oil-based vehicles and climate change. In order to meet the charging demand and range anxiety of EV users, Fast Charging Stations (FCS) are required. As these FCS are grid-connected, they are going to be a new non-linear load for the host utility, which will impact its Power Quality (PQ). In this thesis, Common DC and AC bus (CDCB and CACB) architectures for grid-connected FCS are examined. For both architectures, two-level Voltage Source Converter (VSC) is used to connect the EV FCS to the grid, and further cascaded DC-DC converters are used for voltage regulation at the charger end. The Unit Template (UTC) and dq-SRF control methods are implemented for switching control of the VSC. The Constant Current-Constant Voltage (CC-CV) method is used for the control of DC-DC converters. The simulations are run in MATLAB/Simulink®. The following studies are carried out: • Comparison of CDCB & CACB architectures by varying load and transformer connections: - results show that CDCB architecture gives better performance in terms of charging and PQ, and the star-delta configuration of Distribution Transformer (DT) connections provides lower harmonics. • Comparison of two control strategies for the VSC using UTC and dq-SRF control strategies: - results show that UTC strategy performs better than dq-SRF method for control and operation of VSC. • Studying the impact of varying X/R ratio and MVASC: - results show that MVASC and X/R ratio has significant impact on a weak-grid operation connected with the FCS. • Studying the system with and without PV-panel: - results show that inclusion of PV-panel increases the reliability and efficiency of the system. There is small increase in THDV and THDI due to inclusion of PV-panel, but is as per the IEEE-519 standards. • Comparison of a Conventional-Capacitor (CC) with Super-Capacitor (SC) for the common DC bus: - results show that SC escalates the charging speed with fewer harmonics. • Comparison of two architectures in Vehicle to Grid (V2G) mode: - results show low harmonic content and better State of Discharge (SoD) with CDCB architecture.","abstract_html":"Future transportation needs are going to be met by Electric Vehicles (EVs) because of global pollution by oil-based vehicles and climate change. In order to meet the charging demand and range anxiety of EV users, Fast Charging Stations (FCS) are required. As these FCS are grid-connected, they are going to be a new non-linear load for the host utility, which will impact its Power Quality (PQ). In this thesis, Common DC and AC bus (CDCB and CACB) architectures for grid-connected FCS are examined. For both architectures, two-level Voltage Source Converter (VSC) is used to connect the EV FCS to the grid, and further cascaded DC-DC converters are used for voltage regulation at the charger end. The Unit Template (UTC) and dq-SRF control methods are implemented for switching control of the VSC. The Constant Current-Constant Voltage (CC-CV) method is used for the control of DC-DC converters. The simulations are run in MATLAB/Simulink®. The following studies are carried out: • Comparison of CDCB & CACB architectures by varying load and transformer connections: - results show that CDCB architecture gives better performance in terms of charging and PQ, and the star-delta configuration of Distribution Transformer (DT) connections provides lower harmonics. • Comparison of two control strategies for the VSC using UTC and dq-SRF control strategies: - results show that UTC strategy performs better than dq-SRF method for control and operation of VSC. • Studying the impact of varying X/R ratio and MVASC: - results show that MVASC and X/R ratio has significant impact on a weak-grid operation connected with the FCS. • Studying the system with and without PV-panel: - results show that inclusion of PV-panel increases the reliability and efficiency of the system. There is small increase in THDV and THDI due to inclusion of PV-panel, but is as per the IEEE-519 standards. • Comparison of a Conventional-Capacitor (CC) with Super-Capacitor (SC) for the common DC bus: - results show that SC escalates the charging speed with fewer harmonics. • Comparison of two architectures in Vehicle to Grid (V2G) mode: - results show low harmonic content and better State of Discharge (SoD) with CDCB architecture.","abstract_has_math":false,"creators":["Sharma, Gagandeep"],"institution":"University of Ontario Institute of Technology","degree_name":"Master of Applied Science (MASc)","degree_level":null,"degree_discipline":"Electrical and Computer Engineering","degree_department":null,"school":null,"contributors":[],"advisors":["Sood, Vijay K."],"committee_chairs":[],"committee_members":[],"year":2020,"date_issued":"2020-10-01","date_published":"2020-10-01","updated_at":"2026-07-24T05:35:28Z","subjects":["Electric grid","Electric vehicle (EV)","FCS","Power quality","Harmonics"],"languages":["en"],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://hdl.handle.net/10155/1266","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["Sood, Vijay K."]},{"key":"dc:creator","label":"Author","values":["Sharma, Gagandeep"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2021-02-26T19:57:25Z","2022-03-29T16:46:21Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2021-02-26T19:57:25Z","2022-03-29T16:46:21Z"]},{"key":"dc:date.issued","label":"Date","values":["2020-10-01"]},{"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 Applied Science (MASc)"]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Ontario Institute of Technology"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Electric grid","Electric vehicle (EV)","FCS","Power quality","Harmonics"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language.iso","label":"Language (ISO)","values":["en"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["https://hdl.handle.net/10155/1266"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["Future transportation needs are going to be met by Electric Vehicles (EVs) because of global pollution by oil-based vehicles and climate change. In order to meet the charging demand and range anxiety of EV users, Fast Charging Stations (FCS) are required. As these FCS are grid-connected, they are going to be a new non-linear load for the host utility, which will impact its Power Quality (PQ). In this thesis, Common DC and AC bus (CDCB and CACB) architectures for grid-connected FCS are examined. For both architectures, two-level Voltage Source Converter (VSC) is used to connect the EV FCS to the grid, and further cascaded DC-DC converters are used for voltage regulation at the charger end. The Unit Template (UTC) and dq-SRF control methods are implemented for switching control of the VSC. The Constant Current-Constant Voltage (CC-CV) method is used for the control of DC-DC converters. The simulations are run in MATLAB/Simulink®. The following studies are carried out: • Comparison of CDCB & CACB architectures by varying load and transformer connections: - results show that CDCB architecture gives better performance in terms of charging and PQ, and the star-delta configuration of Distribution Transformer (DT) connections provides lower harmonics. • Comparison of two control strategies for the VSC using UTC and dq-SRF control strategies: - results show that UTC strategy performs better than dq-SRF method for control and operation of VSC. • Studying the impact of varying X/R ratio and MVASC: - results show that MVASC and X/R ratio has significant impact on a weak-grid operation connected with the FCS. • Studying the system with and without PV-panel: - results show that inclusion of PV-panel increases the reliability and efficiency of the system. There is small increase in THDV and THDI due to inclusion of PV-panel, but is as per the IEEE-519 standards. • Comparison of a Conventional-Capacitor (CC) with Super-Capacitor (SC) for the common DC bus: - results show that SC escalates the charging speed with fewer harmonics. • Comparison of two architectures in Vehicle to Grid (V2G) mode: - results show low harmonic content and better State of Discharge (SoD) with CDCB architecture."]},{"key":"dc:title","label":"Title","values":["Harmonic emissions assessment for common DC and AC electric vehicle charging station architectures"]}]}],"canonical_facts":{"dc:contributor.advisor":["Sood, Vijay K."],"dc:creator":["Sharma, Gagandeep"],"dc:date.accessioned":["2021-02-26T19:57:25Z","2022-03-29T16:46:21Z"],"dc:date.available":["2021-02-26T19:57:25Z","2022-03-29T16:46:21Z"],"dc:date.issued":["2020-10-01"],"dc:description.abstract":["Future transportation needs are going to be met by Electric Vehicles (EVs) because of global pollution by oil-based vehicles and climate change. In order to meet the charging demand and range anxiety of EV users, Fast Charging Stations (FCS) are required. As these FCS are grid-connected, they are going to be a new non-linear load for the host utility, which will impact its Power Quality (PQ). In this thesis, Common DC and AC bus (CDCB and CACB) architectures for grid-connected FCS are examined. For both architectures, two-level Voltage Source Converter (VSC) is used to connect the EV FCS to the grid, and further cascaded DC-DC converters are used for voltage regulation at the charger end. The Unit Template (UTC) and dq-SRF control methods are implemented for switching control of the VSC. The Constant Current-Constant Voltage (CC-CV) method is used for the control of DC-DC converters. The simulations are run in MATLAB/Simulink®. The following studies are carried out: • Comparison of CDCB & CACB architectures by varying load and transformer connections: - results show that CDCB architecture gives better performance in terms of charging and PQ, and the star-delta configuration of Distribution Transformer (DT) connections provides lower harmonics. • Comparison of two control strategies for the VSC using UTC and dq-SRF control strategies: - results show that UTC strategy performs better than dq-SRF method for control and operation of VSC. • Studying the impact of varying X/R ratio and MVASC: - results show that MVASC and X/R ratio has significant impact on a weak-grid operation connected with the FCS. • Studying the system with and without PV-panel: - results show that inclusion of PV-panel increases the reliability and efficiency of the system. There is small increase in THDV and THDI due to inclusion of PV-panel, but is as per the IEEE-519 standards. • Comparison of a Conventional-Capacitor (CC) with Super-Capacitor (SC) for the common DC bus: - results show that SC escalates the charging speed with fewer harmonics. • Comparison of two architectures in Vehicle to Grid (V2G) mode: - results show low harmonic content and better State of Discharge (SoD) with CDCB architecture."],"dc:identifier.uri":["https://hdl.handle.net/10155/1266"],"dc:language.iso":["en"],"dc:subject":["Electric grid","Electric vehicle (EV)","FCS","Power quality","Harmonics"],"dc:title":["Harmonic emissions assessment for common DC and AC electric vehicle charging station architectures"],"dc:type":["Thesis"],"thesis:degree_discipline":["Electrical and Computer Engineering"],"thesis:degree_name":["Master of Applied Science (MASc)"],"thesis:institution_name":["University of Ontario Institute of Technology"]},"updated_at":"2026-07-24T05:35:28Z"}