[{"key":"dc.contributor.author","value":"Kaushik, Abhay","language":null},{"key":"dc.date.accessioned","value":"2026-04-16T23:46:44Z","language":null},{"key":"dc.date.available","value":"2026-04-16T23:46:44Z","language":null},{"key":"dc.date.issued","value":"2026","language":"en"},{"key":"dc.identifier.uri","value":"http:\/\/hdl.handle.net\/2429\/94143","language":null},{"key":"dc.description.abstract","value":"Voltage-source converter (VSC)-based AC machine drives are the most widely utilized electromechanical systems. From industrial automation to electric transportation and marine \r\nelectrical systems, AC machine drives are well-established for their high efficiency and superior \r\ncontrol. The design and analysis of these drives rely on computer simulations of AC machine \r\ndrives in electromagnetic transient (EMT) simulation programs. Commonly used detailed \r\nswitching models (DSMs) are computational bottlenecks due to the need for small step sizes, \r\nwhich slows simulations. Instead of DSMs, average-value models (AVMs) have been developed \r\nthat neglect switching, allowing larger step sizes and making them much faster. However, \r\nconverter physics such as power losses, fundamental voltage drop, and bidirectional power flow \u2013 \r\nall of which the DSM can capture \u2013 are not captured by the conventional AVMs. This is because \r\nconventional analytical AVMs are derived under the assumption of an ideal power balance and a \r\nfixed mode of operation for the AC machine drive (motoring or generating).  \r\nThis thesis proposes new methods of parameterizing experimentally determined losses and \r\nfundamental voltage drop, which can be added to existing voltage-source inverter (VSI) AVMs. \r\nFurther, this thesis develops bidirectional VSC AVMs capable of accommodating bidirectional \r\npower flow by first extending an existing parametric average-value modelling approach and then \r\nformulating a novel approach that considers bidirectional operation from the start point. \r\nThrough extensive computer studies and experimental validation, it is demonstrated that the proposed lossy AVM (LAVM) accurately captures steady-state losses and fundamental voltage \r\ndrop and produces accurate results in time-domain transients. The proposed bidirectional AVM \r\nmethodology has been extended to the 120-degree VSI BLDC drives and demonstrated to produce excellent results in the time- and frequency-domain for motoring and generating modes.","language":"en"},{"key":"dc.language.iso","value":"eng","language":"en"},{"key":"dc.publisher","value":"University of British Columbia","language":"en"},{"key":"dc.rights","value":"Attribution-NonCommercial-NoDerivatives 4.0 International","language":"*"},{"key":"dc.rights.uri","value":"http:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/","language":"*"},{"key":"dc.title","value":"Average value modelling of AC machine drives considering losses and bidirectional power flow for simulations in electromagnetic transient programs","language":"en"},{"key":"dc.type","value":"Text","language":"en"},{"key":"dc.degree.name","value":"Master of Applied Science - MASc","language":"en"},{"key":"dc.degree.discipline","value":"Electrical and Computer Engineering","language":"en"},{"key":"dc.degree.grantor","value":"University of British Columbia","language":"en"},{"key":"dc.contributor.supervisor","value":"Jatskevich, Juri","language":null},{"key":"dc.date.graduation","value":"2026-05","language":"en"},{"key":"dc.type.text","value":"Thesis\/Dissertation","language":"en"},{"key":"dc.description.affiliation","value":"Applied Science, Faculty of","language":"en"},{"key":"dc.description.affiliation","value":"Electrical and Computer Engineering, Department of","language":"en"},{"key":"dc.degree.campus","value":"UBCV","language":"en"},{"key":"dc.description.scholarlevel","value":"Graduate","language":"en"}]