Open AccessAsymptotically stable controller for SSTs based on Lyapunov direct stability method
Author(s) -
Beiranvand Hamzeh,
Rokrok Esmaeel
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.2017.0285
Subject(s) - control theory (sociology) , lyapunov function , controller (irrigation) , matlab , lyapunov redesign , voltage , lyapunov stability , transformer , computer science , mathematics , engineering , nonlinear system , control (management) , physics , electrical engineering , quantum mechanics , artificial intelligence , agronomy , biology , operating system
An asymptotically stable controller for solid‐state transformers (SSTs) based on Lyapunov direct stability (LDS) method is presented in this study. The proposed controller has four control objectives for the SST application, which includes unity power factor at medium‐voltage AC (VAC) side of the SST, constant DC‐link voltage and constant output voltage magnitude and frequency at low‐VAC side of the SST. To fulfil the above‐mentioned objectives four control laws are derived from the Lyapunov function, directly. The proposed LDS‐based controller is simulated using MATLAB/Simulink software. The obtained results indicate the fast and superior dynamic characteristics of the proposed controller. The LDS‐based controller is comprehensive and can be adopted for the SST applications.