access icon free Model development and small-signal stability analysis of DFIG with stator winding inter-turn fault

© The Institution of Engineering and Technology
Received 17/06/2016, Accepted 28/10/2016, Revised 28/09/2016, Published 01/11/2016

Much attention has been continuously paid on the model development and stability analysis of the doubly fed induction generator (DFIG) widely applied in wind power generation. Similarly, this study develops the form-standardised state-space model in the dq reference frame of the DFIG with stator winding inter-turn fault (SWITF). Compared with those previously developed, it is definitely preferable for the simulation and stability analysis of the DFIG with SWITF due to its standard form. Moreover, for the DFIG with SWITF working in stator-voltage-oriented control frame, the small-signal stability analysis is conducted using MATLAB simulation, yielding the conclusion that SWITF will never eradicate the DFIG's small-signal stability but deteriorate it to some extent. This conclusion is further validated by means of the Lyapunov stability theory. As a kind of contribution of this study, the analytical expressions of the eigenvalues of the DFIG with SWITF are derived. Case study based on an MATLAB/Simulink demo routine is completed to demonstrate the validity of the model development and small-signal stability analysis of the DFIG with SWITF.

Inspec keywords: stators; asynchronous generators; Lyapunov methods; machine control; eigenvalues and eigenfunctions; wind power

Other keywords: eigenvalue analytical expressions; stator-voltage-oriented control frame; doubly fed induction generator; wind power generation; Simulink demo routine; small-signal stability analysis; dq reference frame; stator winding inter-turn fault; model development; form-standardised state-space model; Matlab simulation; Lyapunov stability theory

Subjects: Linear algebra (numerical analysis); Wind power plants; Stability in control theory; Asynchronous machines; Linear algebra (numerical analysis); Control of electric power systems

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