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Dissertation
Unbalanced power converter modeling for AC/DC power distribution systems
Doctor of Philosophy (Ph.D.), Drexel University
Dec 2006
DOI:
https://doi.org/10.17918/etd-1231
Abstract
In power distribution systems, the installation of power electronics based equipment has grown rapidly for ac/dc system coupling, system protection, alternative energy source interface, etc. This thesis will focus on power electronic component and system modeling techniques and three-phase ac/dc power flow analysis for power distribution systems. First, mathematical models are developed for unbalanced power electronic converters, such as thyristor converters, diode rectifiers, and Pulse-Width-Modulated (PWM) converters. The modeling approach captures the imbalance of distribution systems using three, delta-connected, single-phase converters. In order to perform system analysis, these models have been incorporated into two types of ac/dc power flow solvers: (i) a three-phase backward/forward sequential solver and (ii) a threephase unified solver using the modified nodal analysis method. Both solvers have been applied to unbalanced radial and weakly meshed distribution systems. Finally, an ac/dc system hardware test bed was created to validate the mathematical models and the performance of the power flow solvers. Extensive hardware tests, time domain simulations, and steady-state analysis have been performed.
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Details
- Title
- Unbalanced power converter modeling for AC/DC power distribution systems
- Creators
- Xiaoguang Yang - DU
- Contributors
- Karen Nan Miu (Advisor) - Drexel University (1970-)
- Awarding Institution
- Drexel University
- Degree Awarded
- Doctor of Philosophy (Ph.D.)
- Publisher
- Drexel University; Philadelphia, Pennsylvania
- Resource Type
- Dissertation
- Language
- English
- Academic Unit
- College of Engineering (1970-2026); Electrical (and Computer) Engineering [Historical]; Drexel University
- Other Identifier
- 1231; 991014632053404721