Finite-time fault detection and reconstruction of permanent magnet synchronous generation wind turbine via sliding mode observer. (English) Zbl 1537.93125
Summary: In this study, a method for fault detection of a permanent magnet synchronous generator (PMSG) wind turbine is proposed. The dynamic model of the wind energy conversion system is simulated and the system’s fault is diagnosed using a proposed terminal sliding mode observer (TSMO). The nonlinear state-space equations of the closed-loop wind turbine are derived, which include a robust adaptive controller that is implemented for maximum power capture and a PI controller that is designed for pitch angle control. Then, utilising a new approach, a TSMO is designed for estimating the states and faults in a finite time. The stability and convergence of the states and fault estimation error are investigated via the Lyapunov stability theory. A \(3kw\) PMSG wind turbine is simulated and using TSMO the states are estimated and a blade imbalance fault (BIF) fault is detected. The state and fault estimation errors converge to zero in a finite time.
MSC:
| 93B12 | Variable structure systems |
| 93B53 | Observers |
| 93C40 | Adaptive control/observation systems |
| 93C95 | Application models in control theory |
Keywords:
wind energy conversion system; permanent magnet synchronous generator wind turbine; fault diagnosis; terminal sliding mode observer; blade imbalance faultReferences:
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