Open AccessGrid impedance estimation for islanding detection and adaptive control of converters
Author(s) -
Ghanem Abdelhady,
Rashed Mohamed,
Sumner Mark,
Elsayes Mohamed A.,
Mansy Ibrahim I.I.
Publication year - 2017
Publication title -
iet power electronics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.637
H-Index - 77
eISSN - 1755-4543
pISSN - 1755-4535
DOI - 10.1049/iet-pel.2016.0780
Subject(s) - islanding , control theory (sociology) , converters , ripple , controller (irrigation) , electrical impedance , matlab , grid , computer science , power (physics) , electronic engineering , electric power system , engineering , voltage , control (management) , mathematics , electrical engineering , physics , agronomy , geometry , quantum mechanics , artificial intelligence , biology , operating system
Power system (grid) impedance is time varying due to the changing structure of the power system configuration and it can have a considerable influence on the control and stability of grid connected converters. This study presents an online grid impedance estimation method using the output switching current ripple of a space vector pulse‐width modulator‐based grid connected converter. The proposed impedance estimation method is derived from the discretised system model using two consecutive samples within a single switching period. The estimated impedance is used for islanding detection and online current controller parameter tuning. Theoretical analysis and MATLAB simulation results are presented to verify the proposed method and its effectiveness is validated using experimental testing.