Modeling of modular multilevel converters using extended-frequency dynamics phasors

dc.contributor.authorRajesvaran, Shailajah
dc.contributor.examiningcommitteeUdaya, Annakkage (Electrical and Computer Engineering) Mark, Tachie (Mechanical Engineering)en_US
dc.contributor.supervisorShaahin, Filizadeh (Electrical and Computer Engineering)en_US
dc.date.accessioned2016-09-08T20:33:44Z
dc.date.available2016-09-08T20:33:44Z
dc.date.issued2016
dc.degree.disciplineElectrical and Computer Engineeringen_US
dc.degree.levelMaster of Science (M.Sc.)en_US
dc.description.abstractThis thesis investigates modeling of modular multilevel converters (MMCs) using an averaging method known as extended-frequency dynamic phasors. An MMC can be used as an inverter or a rectifier in high voltage direct current (HVDC) system. This research develops a dynamic phasor model for an MMC operated as an inverter. Extended-frequency dynamic phasors are used to model a system with only interested harmonics present. The developed model is capable of capturing both the low and high-frequency dynamic behavior of the converter depending on the requirements of the study to be performed. The selected MMC model has 5 submodules per arm (6-level converter), nearest level control, capacitor voltage balancing, direct control and phase-locked loop (PLL) synchronization. With the above features, the developed dynamic phasor model is validated with electromagnetic transient model is developed using PSCAD simulation software. The results are compared at transient and steady state with disturbances. The main computational advantage of this modeling is achieving less simulation time with inclusion of harmonics of interest.en_US
dc.description.noteOctober 2016en_US
dc.identifier.urihttp://hdl.handle.net/1993/31651
dc.language.isoengen_US
dc.rightsopen accessen_US
dc.subjectModular mutilevel converter, Dynamic phasor, HVDC, EMT simulationen_US
dc.titleModeling of modular multilevel converters using extended-frequency dynamics phasorsen_US
dc.typemaster thesisen_US
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