Wide-area synthetic inertia control of multiple resources incorporating primary frequency control of wind turbines

With a large proportion of renewable energy sources integrated through the power electronics interface, power systems are challenged with decreased inertia threatening the system stability. Synthetic inertia control aims to emulate inertial response of various available resources. A wide-area synthetic inertia control strategy for multiple resources is proposed in this paper. The offshore wind farm composed of DFIG wind turbines is interconnected by the VSC-HVDC link. Synchronous condensers are installed to improve the system dynamic characteristics. Synthetic inertia control is designed for DFIG wind turbines, VSC-HVDC link and synchronous condensers, respectively. Wide-area frequency signal is employed to overcome the limitation of local signal. Primary frequency control support by DFIG wind turbines is incorporated to improve the control effect of the strategy. Simulation results on New England 39-bus system verify the effectiveness of the proposed wide-area synthetic inertia control strategy. (paper)