Open AccessFuzzy‐PI‐based sensorless frequency and voltage controller for doubly fed induction generator connected to a DC microgrid
Author(s) -
Bayhan Sertac,
Demirbas Sevki,
AbuRub Haitham
Publication year - 2016
Publication title -
iet renewable power generation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.005
H-Index - 76
ISSN - 1752-1424
DOI - 10.1049/iet-rpg.2015.0504
Subject(s) - control theory (sociology) , microgrid , pid controller , stator , controller (irrigation) , rotor (electric) , induction generator , voltage , automatic frequency control , computer science , engineering , control engineering , control (management) , electrical engineering , temperature control , agronomy , artificial intelligence , biology
This study presents fuzzy‐proportional–integral (PI)‐based sensorless frequency and voltage control strategy for doubly fed induction generator connected to a dc microgrid system. A significant reduction of the costs can be achieved by this topology because only a single dc/ac converter and a diode rectier are required instead of the traditional back‐to‐back converter topology. To improve the performance of the rotor current controller, a fuzzy PI‐based control algorithm is used. Furthermore, a simple sensorless control technique based on the detection of the stator frequency is employed to detect the rotor position. The sensorless control technique can operate without the knowledge of the machine parameters. The main aim of this study is to keep the stator frequency as well as the dc bus voltage at the desired value under different load and wind speed conditions without using position sensor. Simulation and experimental studies were performed to verify the dynamic and steady‐state performances of the proposed control strategy The results show that the proposed strategy not only has an excellent steady state and dynamic performance, but also it is robust against the variation of system parameters such as wind speed and load.