A passive islanding detection index based on variation of signal energy

Author

Liu, Ning ; Aljankawey, A.S. ; Diduch, C.P. ; Chang, L. ; Su, Jianhui ; Yu, Miao

Author_Institution

Dept. of Electr. & Comput. Eng., Univ. of New Brunswick-Fredericton, Fredericton, NB, Canada

fYear

2012

fDate

25-28 June 2012

Firstpage

364

Lastpage

367

Abstract

A new index for passive islanding detection is proposed. The approach exploits the inherent harmonic distortion produced by grid-connected power converters as well as the frequency dependent changes in the grid impedance as seen by the distributed generator before and following islanding. The new index is computed from the variation of signal energy over a certain band of frequencies contained within a virtual power signal. The virtual power signal is obtained from measurements of voltage and current at the point of common coupling. The approach is validated via simulation and is demonstrated on a 7kW distributed generator system.

Keywords

distributed power generation; electric current measurement; harmonic distortion; power convertors; voltage measurement; current measurement; distributed generator; grid connected power converters; grid impedance; inherent harmonic distortion; passive islanding detection index; point of common coupling; power 7 kW; signal energy; virtual power signal; voltage measurement; Distributed power generation; Generators; Harmonic analysis; Impedance; Indexes; Real time systems; Voltage measurement; Passive islanding detection; distributed generation; grid impedance; harmonics; variation of signal energy;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics for Distributed Generation Systems (PEDG), 2012 3rd IEEE International Symposium on

Conference_Location

Aalborg

Print_ISBN

978-1-4673-2021-4

Electronic_ISBN

978-1-4673-2022-1

Type

conf

DOI

10.1109/PEDG.2012.6254027

Filename

6254027