Open AccessWide frequency range active damping of LCL‐filtered grid‐connected converters
Author(s) -
Ghanem Abdelhady,
Rashed Mohamed,
Sumner Mark,
Elsayes Mohamed Adel,
Mansy Ibrahim. I. I.
Publication year - 2019
Publication title -
the journal of engineering
Language(s) - English
Resource type - Journals
ISSN - 2051-3305
DOI - 10.1049/joe.2018.8164
Subject(s) - converters , harmonics , capacitor , grid , control theory (sociology) , frequency domain , controller (irrigation) , voltage , range (aeronautics) , ac power , computer science , resonance (particle physics) , electronic engineering , engineering , physics , electrical engineering , mathematics , control (management) , agronomy , geometry , particle physics , artificial intelligence , aerospace engineering , computer vision , biology
It can be challenging to guarantee the stability of grids with many converters with LCL filters connected due to the presence of multiple resonances within the system. This paper presents an active damping technique to mitigate multiple resonance effects and harmonics in power converters connected to weak grids. The proposed technique employs grid current and capacitor voltage feedback to achieve active damping for a wide range of multiple resonance frequencies. The effectiveness of the proposed wide frequency active damping and improved controller stability is demonstrated through frequency domain analysis and experimental results for single and parallel grid‐connected converters.