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Modeling And Stability Analysis Of A Series Single-Phase Power Electronic Based Power System

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posted on 2019-01-03, 20:59 authored by Yimajian YanYimajian Yan
Tightly regulated power converters behave as constant power loads which may introduce instability in power systems. Prior to this work, the design-oriented stability criteria of DC and three-phase AC systems has been extensively studied, while the stability of single-phase AC power systems has received less attention. In this research, the modeling and stability analysis of single-phase AC power systems is studied. In particular, this research focuses on a system architecture where loads are connected in series and powered by a current source. Based on the proposed current source and load power electronic based topologies, which are typically used in airfield lighting systems, three types of system characterization are developed: waveform-level model, average-value qd model, and qd impedance/admittance measurement. Each approach has its own advantages and drawbacks, but the result - a frequency-domain (s-domain) representation of the system, is identical. Applying the generalized Nyquist stability criterion, the small-signal stability criteria of the system is developed. It is shown that the predictions of the system stability using these three approaches are consistent.


Degree Type

Doctor of Philosophy


Electrical and Computer Engineering

Campus location

West Lafayette

Advisor/Supervisor/Committee Chair

Scott D. Sudhoff

Additional Committee Member 2

Jianghai Hu

Additional Committee Member 3

Oleg Wasynczuk

Additional Committee Member 4

Steven D. Pekarek