Identification of gain and phase margins based robust stability regions for a time-delayed micro-grid system including fractional-order controller in presence of renewable power generation
Küçük Resim Yok
Tarih
2022
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
This study examines the gain and phase margins (GPMs) based robust stability margins in the parameter\rspace of fractional order proportional-integral (FOPI) controller for a micro-grid (MG) system with communication\rtime delays. Fluctuations in renewable energy sources (RESs), uncertainties in parameters of system components and\rcommunication delays could adversely affect the dynamical analysis and frequency stability of the MG system. Such a\rMG system has an interval characteristic due to the parametric variations and the interval transfer functions defined\rby Kharitonov’s theorem, which presents a solution for checking of robust stability. Therefore, this study addresses the\rrobust stability regions containing a set of robust FOPI controller gains for all possible transfer functions of the MG system\rby a simple graphical method working in controller parameter space. In this way, the impact of fractional order degree of\rintegral controller on the robust stability regions is exhaustively examined by the graphical method. Additionally, robust\rperformance of the interval MG system in terms of design specifications including GPMs is analyzed, and the effect of\rGPMs on the robust regions is investigated by the graphical method. Results indicate that GPM parameters provide\rthe desirable performances for the MG and fractional order of integral controller considerably increases the robustness\rof the stability margin of the MG when compared with the integer order PI controller.
Açıklama
Anahtar Kelimeler
Mühendislik, Elektrik ve Elektronik, Bilgisayar Bilimleri, Yazılım Mühendisliği, Enerji ve Yakıtlar
Kaynak
Turkish Journal of Electrical Engineering and Computer Sciences
WoS Q Değeri
Scopus Q Değeri
Cilt
30
Sayı
3
