Title page for ETD etd-10262005-101021
|Type of Document
||Stability analysis of large-scale power electronics systems
|Cho, Bo H.
|Ball, Joseph A.
|Lee, Fred C.
|Sable, Don M.
|VanLandingham, Hugh F.
- Power electronics
- Electric power system stability
|Date of Defense
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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