Improved inverse Jiles-Atherton hysteresis model for investigating controlled switching of three-phase five-limb parallel-operated HVDC converter transformers
| dc.contributor.author | Fang, Chun | |
| dc.contributor.examiningcommittee | Annakkage, Udaya (Electrical and Computer Engineering) Wu, Nan (Mechanical Engineering) | en_US |
| dc.contributor.supervisor | Rajapakse, Athula (Electrical and Computer Engineering) Jacobson, David (Electrical and Computer Engineering) | en_US |
| dc.date.accessioned | 2017-08-02T16:20:25Z | |
| dc.date.available | 2017-08-02T16:20:25Z | |
| dc.date.issued | 2017 | |
| dc.degree.discipline | Electrical and Computer Engineering | en_US |
| dc.degree.level | Master of Science (M.Sc.) | en_US |
| dc.description.abstract | Ferromagnetic characteristics and magnetic coupling are two crucial aspects when investigating controlled switching transient phenomenon of three-phase five-limb power transformers. Classic Jiles-Atherton (J-A) hysteresis model is popular in engineering applications but model parameters identification remains a difficult undertaking. This thesis explored novel techniques to improve overall accuracy and stability of inverse J-A model. A comprehensive process using a constrained multi-objective particle swarm optimization (PSO) was developed to extract and optimize parameters from published measurements of M3 grade grain-oriented electrical steel. A new methodology was proposed to define a variable that substitutes constant J-A model parameter which substantially improved its precision on minor and major hysteresis loops and magnetization curve simultaneously. This modified model was incorporated into a duality based hybrid transformer model in PSCAD/EMTDC with a computational efficient solution algorithm. Finally, an extensive systematic analysis was conducted to evaluate feasibility and performance of controlled switching three-phase five-limb parallel-operated transformers. | en_US |
| dc.description.note | October 2017 | en_US |
| dc.identifier.uri | http://hdl.handle.net/1993/32339 | |
| dc.language.iso | eng | en_US |
| dc.rights | open access | en_US |
| dc.subject | Jiles-Atherton, Hysteresis, Controlled switching, HVDC, PSO | en_US |
| dc.title | Improved inverse Jiles-Atherton hysteresis model for investigating controlled switching of three-phase five-limb parallel-operated HVDC converter transformers | en_US |
| dc.type | master thesis | en_US |