부산대학교 도서관

In small power systems with high penetration of inverter-based resources (IBRs), synchronous generators are dispatched to ensure sufficient inertia and reserves for supporting system frequency during power mismatch contingencies. This paper focuses on studying the performance of hydro power as the primary source of providing inertia and frequency control in high IBR penetration systems. A detailed model of a hydro unit is developed and validated, then used to investigate its behaviour under frequency dynamics. Simulations are conducted for a system representative of the Tasmanian power system, which consistently relies on a significant generation mix sourced from wind power and LCC-HVDC, with local hydro generation playing a crucial role in regulating system frequency. Through simulations involving large shortages of active power due to IBR fault ride-through, the performance of hydro power units is effectively illustrated. Building upon this foundation, this study investigates the impact of water starting time in the hydraulic system and total inertia on system frequency dynamics.