An Online Reduced Order Modeling Based Frequency Regulation Adaptive Control Architecture For Wind Integrated Power Grid

This paper presents a frequency regulation control architecture that can be augmented with existing Wind Turbine Generator (WTG) controllers for maintaining the grid frequency at nominal values on a WTG integrated power grid. The architecture uses an online reduced order modeling of power grid with frequency dependent network equivalents (FDNE) that can seamlessly evaluate the grid fluctuations with respect to the point of common coupling (PCC) of the WTG. Then an adaptive control architecture with the help of an online identification routine is used to augment the torque control of wind generator such that the frequency of the system is balanced. The main advantage of the proposed architecture is that the approach ensures grid frequency stability during oscillations due to grid or WTG related events at any power grid location. The proposed approach not only maintain the frequency within acceptable limits but also makes sure that voltages are at normal values. The architecture is evaluated using wind farm integrated Kundur two-area test system using real-time digital simulator (RTDS).