Title :
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
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;
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
DOI :
10.1109/PEDG.2012.6254027
