A new methodology for the stability analysis of large-scale power electronics systems

Author

Huynh, Phuong ; Cho, Bo H.

Author_Institution

Philips Lab., Briarcliff Manor, NY, USA

Volume

45

Issue

4

fYear

1998

fDate

4/1/1998 12:00:00 AM

Firstpage

377

Lastpage

385

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 source-load model. Applicability of the methodology is verified through the stability analysis of a typical power electronics system

Keywords

circuit stability; identification; power electronics; power system interconnection; power system stability; decoupling; feedback loop; interconnected source-load system; large-scale power electronics system; large-signal stability analysis; nonlinear subsystem; system identification; Feedback loop; Interconnected systems; Large-scale systems; Power electronics; Power system interconnection; Power system modeling; Power system stability; Stability analysis; Stability criteria; System identification;

fLanguage

English

Journal_Title

Circuits and Systems I: Fundamental Theory and Applications, IEEE Transactions on

Publisher

ieee

ISSN

1057-7122

Type

jour

DOI

10.1109/81.669060

Filename

669060