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The problem of multiplicative fault detection and isolation (FDI) in the current sensors of a doubly-fed induction generator (DFIG) is considered in the presence of model uncertainty. A residual generator based on the DFIG model is proposed using the structure of the classical generalized observer scheme (GOS). However, each observer in this scheme is replaced by a robust H-/H∞ fault detection filter...
One of the main challenging issues in induction motor drives is the lack of knowledge about the actual values of some critical parameters, such as rotor and stator resistances which are subject to large variations during operation. Such problem is difficult to resolve due to the strong interconnection between states and parameters in the nonlinear motor model, besides the unavailability of both rotor...
Fault tolerance is gaining interest to increase reliability and availability, for example for distributed energy systems. Doubly fed induction generators need rotor position information for high performance control. As part of a multi-sensor fault tolerant generator system, fault tolerance of the position sensor is presented, using a position estimator. A known position estimator is improved and thoroughly...
Fault tolerance is gaining growing interest to increase reliability and availability of distributed energy systems where, a model based current and voltage sensor fault detection, isolation and reconfiguration is presented for a voltage oriented controlled double Fed induction generator, which is mainly used in wind turbines. A bank of observers is used to provide residuals for the fault detection...
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