Eigen-Sensitivity-Based Sliding Mode Control for LFO Damping in DFIG-Integrated Power Systems

Low-frequency oscillation (LFO) of the synchronous generators in power systems by wind is boring. To improve robustness damping control scheme, this paper applies sliding mode (SMC) at doubly fed induction generator (DFIG), with parameter SMC optimized eigen-sensitivity. The originalities lie in, (1) states strongly associated critical modes are newly applied to design surface, (2) closed-loop model system improved equivalent derived analyze effect on and undesirable noncritical modes, (3) gain damp (4) eigenvector sensitivity derive second-order eigen- solve nonlinear optimization. Numerical results show that proposed damps effectively for different speeds, while avoided.