A novel robust adaptive controller of power system with wind power integration

As the proportion of installed capacity of wind power in total installed capacity continues to increase in China, the influence of the wind farm when dealing with the stability problems of interconnected power system is considered, and a wide-area time-delay damping controller to suppress inter-region low frequency oscillation is designed. In order to obtain a more accurate transfer function model, a multi-innovation recursive least squares algorithm with higher precision and fewer iteration times is presented to improve the identification algorithm of ARMA model. Then, as to the time-varying time-delay problems in the feedback signal, a free-weighting matrices method with lower conservation and without iteration is used to conduct the on-line stabilization design to the system. At last, the example simulation results verify that the proposed identification method has a high accuracy and the wide-area time-delay damping controller can effectively damp the inter-region low-frequency oscillations.