Sensor fault tolerant control of wind conversion system using descriptor approach

摘要

This paper focuses on the design of a Fault Tolerant Control (FTC) strategy of a Wind Energy Conversion System (WECS) able to transfer the optimal power despite the presence of sensor fault and wind speed variation. The dynamic behavior of the WECS adopted in this work is described by a Takagi-Sugeno fuzzy model. The inaccessible rotor flux and the sensor faults are jointly estimated by a descriptor observer which use the stator current, the rotor speed and the DC bus voltage as a measurable inputs. A Linear Matrix Inequality (LMI) was solved to calculate the controller and the observer gains. Finally, to show the effectiveness of our developed fuzzy approach a numerical simulation has been performed.