PSERC Future Grid Initiative Proceedings

The work under this Task developed control methodologies and designs that address the problem of maintaining grid electromechanical stability in light of increasing percentage of production from power-electronically coupled renewable resources, such as wind. The challenge in maintaining stable frequency control can arise as synchronous generators, the traditional grid-stabilizing mechanisms, are displaced by wind resources. In this scenario, very modest amounts of battery-based energy storage, which offers small magnitude, high-bandwidth control action, is demonstrated to be a valuable complement to much slower acting active power control available from wind resources. This Task developed a distributed control architecture and specific design algorithms that coordinate these different classes of control resources across multiple grid locations (wind and storage need not be co-located). The control performance is enhanced by employing dynamic state estimators at each controller, augmenting local information with a small number of remote synchrophasor measurements.