Bifurcation Analysis of Parallel-Connected Voltage-Source Inverters With Constant Power Loads

This paper focuses on the stability analysis of a small ac microgrid with two inductive droop inverters driving several identical three-phase controlled rectifiers, which are modeled as time-invariant nonlinear dynamical constant power loads. A reduced model is adopted for this microgrid, which only...

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Bibliographic Details
Published in:IEEE transactions on smart grid 2018-11, Vol.9 (6), p.5482-5493
Main Authors: Lenz Cesar, Eduardo, Pagano, Daniel J., Pou, Josep
Format: Article
Language:English
Subjects:
AC-DC power converters
bifurcation analysis
Bifurcations
Distributed generation
Droop control
dynamic constant power load
Dynamic stability
Electric power distribution
Impedance
Inverters
Load modeling
load sharing
Microgrids
Parallel connected
Rectifiers
Stability analysis
Transmission lines
virtual impedance
Voltage control
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Description
Summary:This paper focuses on the stability analysis of a small ac microgrid with two inductive droop inverters driving several identical three-phase controlled rectifiers, which are modeled as time-invariant nonlinear dynamical constant power loads. A reduced model is adopted for this microgrid, which only considers the inverter output characteristics, the rectifier input properties, and the transmission line dynamics. Based on this reduced model, the microgrid stability is analyzed for different values of load power using a bifurcation analysis approach.
ISSN:1949-3053
1949-3061
DOI:10.1109/TSG.2017.2668381