摘要：AbstractThis paper investigates, how Ternary Pumped Storage Hydropower (T-PSH) can help enhance power system resiliency by contributing primary frequency regulation in both pumping and generating modes. As renewable penetration increases, power system inertia decreases. Simultaneously, the frequency of storms and earthquakes have increased. As such power system resiliency is a key issue in low inertia power systems. To cater to this issue, the authors investigate the ability of T-PSH to provide primary frequency support in pumping and generating mode. The governor dynamics of the IEEE 9-bus system and T-PSH have been modeled and integrated. When the system is subjected to a step increase or decrease in load, results display that not only can the T-PSH provide pump mode regulation using the hydraulic short-circuit, but it can also transit smoothly between pumping and generating mode within a few seconds using the clutch. By changing its mode, the T-PSH unit can provide a regulation capability equal to twice that of the unit rating.
