Linear system analysis and state observer design of grid connected inverter model based on system identification

Conference proceedings article

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Publication Details

Author list: Patcharaprakiti N., Thongprong J., Kirtikara K., Saelao J.

Publisher: Hindawi

Publication year: 2012

Start page: 29

End page: 36

Number of pages: 8

ISBN: 9780889869110

ISSN: 0146-9428

eISSN: 1745-4557

URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84861936332&doi=10.2316%2fP.2012.769-027&partnerID=40&md5=761afb5b122cefc6fae0446eb1e64d92

Languages: English-Great Britain (EN-GB)

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Abstract

In this paper, a discrete linear time invariant system analysis of grid connected inverter model is proposed. There are two stages of research methodology. Firstly, a grid connected inverter model is executed based on system identification approach. A Hammerstein-Wiener nonlinear model is selected to describe system. An experimental setup is performed and input-output data is processed with a statistic and mathematic method. The appropriate model with high accuracy and reasonable model criteria is derived for system analysis. In second stage, nonlinear system is linearized around the operating point with Talyor approximation and then a state space and transfer function is derived. A discrete linear time invariant system concepts including state space, transfer function, stability, controllability, observability and state observer design are proposed.

Keywords

Grid connected inverter, Photovoltaic system, State observer, System identification