Doubly Fed Induction Generator Model-Based Sensor Fault Detection and Control Loop Reconfiguration

Abstract

Fault tolerance is gaining interest as a means to increase the reliability and availability of distributed energy systems. In this paper, a voltage-oriented doubly fed induction generator, which is often used in wind turbines, is examined. Furthermore, current, voltage, and position sensor fault detection, isolation, and reconfiguration are presented. Machine operation is not interrupted. A bank of observers provides residuals for fault detection and replacement signals for the reconfiguration. Control is temporarily switched from closed loop into open-loop to decouple the drive from faulty sensor readings. During a short period of open-loop operation, the fault is isolated using parity equations. Replacement signals from observers are used to reconfigure the drive and reenter closed-loop control. There are no large transients in the current. Measurement results and stability analysis show good results.

Rotor-current and position estimator for doubly-fed induction generators - application to sensor-fault detection

“…If any residual crosses a defined threshold a fault is detected and the control temporarily switches to open-loop during the fault isolation phase. In [13] the ability of detecting stator-voltage-sensor (using an input observer) and rotorposition faults (using a position estimator and speed observers) is added. Similar residuals are used for fault detection.…”

H∞ Fault Tolerant Control of WECS Based on the PWA Model

“…The linear parameter varying control design method is applied which leads to LMI-based optimization in case of active fault tolerant and BLMI in case of passive fault-tolerant problems. In [2], the authors gave the model-based fault detection and control loop reconfiguration for doubly fed induction generators. In [3], generator-converter fault-tolerant control for direct driven wind turbines was investigated.…”

Fault-Tolerant Control Performance Comparison of Three- and Five-Phase PMSG for Marine Current Turbine Applications

“…In the particular renewable power generation context, some researches have been conducted towards fault-tolerant three-phase generators [10][11][12][13]. However, multiphase generators seem to be an interesting alternative to classical three-phase generators [14].…”