Fault-Tolerant Tracking Observer-Based Controller Design for DFIG-Based Wind Turbine Affected by Stator Inter-Turn Short Circuit
Year: 2025
Type: article
Abstract: This paper introduces a novel strategy for the diagnosis and fault-tolerant control (FTC) of inter-turn short-circuit (ITSC) faults in the stator windings of Doubly Fed Induction Generator (DFIG)-based wind turbines. ITSC faults are among the most common electrical issues in rotating machines: early detection is therefore essential to reduce maintenance costs and prevent severe damage to the wind turbine system. To address this, a Fault Detection and Diagnosis (FDD) approach is proposed to identify and assess the severity of ITSC faults in the stator windings. A state-space model of the DFIG under ITSC fault conditions is first developed in the (d,q) reference frame. Based on this model, an Unknown Input Observer (UIO) structured using Takagi–Sugeno (T-S) fuzzy models is designed to estimate the fault level. To mitigate the impact of the fault and ensure continued operation under degraded conditions, a T-S fuzzy fault-tolerant controller is synthesized. This controller enables natural decoupling and optimal power extraction across a wide range of rotor speed variations. Since the effectiveness of the FTC relies on accurate fault information, a Proportional-Integral Observer (PIO) is employed to estimate the ITSC fault level. The proposed diagnosis and compensation strategy is validated through simulations performed on a 3 kW wind turbine system, demonstrating its efficiency and robustness.
Source: Symmetry
DOI: 10.3390/sym17081343
Language: English
Topic: Wind Turbine Control Systems
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,896
Awards: G1175115578, G121809054, G1301230144, G1312501877, G1446254096, G1855990336, G1937507855, G210041235, G2262748287, G2309174360, G2601397997, G2660406951, G279363373, G300979063, G3406072781, G34346518, G3480869486, G3518538256, G3681454997, G4042783231, G42242660, G425668148, G430777504, G4526231891, G5080475149, G5195188938, G5338730000, G5421974903, G6986923520, G7084143925, G7434936867, G897484643, G99296377
OpenAlex ID: W4413300698