Type of Document	Dissertation
Author	Huynh, Phuong
URN	etd-10262005-101021
Title	Stability analysis of large-scale power electronics systems
Degree	PhD
Department	Electrical Engineering
Advisory Committee	Advisor Name Title Cho, Bo H. Committee Chair Ball, Joseph A. Committee Member Lee, Fred C. Committee Member Sable, Don M. Committee Member VanLandingham, Hugh F. Committee Member
Keywords	Power electronics Electric power system stability
Date of Defense	1994-12-14
Availability	restricted
Abstract A new methodology is proposed to investigate the large-signal stability of interconnected power electronics systems. The approach consists of decoupling the system into a source subsystem and a load subsystem, and stability of the entire system can be analyzed based on investigating the feedback loop formed by the interconnected source/load system. The proposed methodology requires two stages: (1) since the source and the load are unknown nonlinear subsystems, system identification, which consists of isolating each subsystem into a series combination of a linear part and a nonlinear part, must be performed, and (2) stability analysis of the interconnected system is conducted thereafter based on a developed stability criterion suitable for the nonlinear interconnected-block-structure model. Applicability of the methodology is verified through stability analysis of PWM converters and a typical power electronics system.
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