Although recent political decisions have temporarily shifted policy focus toward fossil fuel sources, geopolitical uncertainties continue to position renewable energy and green hydrogen as essential solutions for achieving energy independence. While robust power systems generally accommodate large-scale renewable energy sources and electrolyzer installations without significant operational challenges, weaker electrical systems, such as rural areas or remote islands, remain vulnerable to severe dynamic disturbances. This paper presents a comprehensive feasibility study of a remote island power system in which a wind farm installation supplies electrical energy to an electrolyzer facility connected to the grid. Although the system demonstrates acceptable steady-state operation, wind farm tripping events, such as trip of single feeder or main transformer, induce severe grid disturbances that jeopardize the stability and operability of the entire electrical system, despite the electrolyzer's rapid ramp-down response. To maintain stable grid operation and keep electrolyzer loads connected during such large-scale transient events, this work evaluates both synchronous condensers (SynCond) and battery energy storage systems (BESS) as stabilization technologies, examining various configurations and capacities.

The analysis comprises multiple simulation scenarios. Initially, baseline conditions without support technologies are assessed. Wind farm trip events are found to cause system frequency collapse despite the electrolyzer's fast ramp-down capability, which is under five seconds, as the weak grid lacks sufficient inertia to handle the electrolyzer's initial high-power demand during the transient. Subsequently, SynCond and BESS technologies are evaluated individually to stabilize the system. SynCond-only simulations reveal the necessity for substantial flywheel capacity to prevent frequency collapse, as synchronous condensers cannot sustain continuous active power supply independently. On the other hand, BESS-only simulations demonstrate the need for considerable power capacity ratings to manage the electrolyzer's initial high-power demand. Finally, hybrid SynCond-BESS configurations are analyzed, demonstrating a complementary operational strategy: SynCond provides instantaneous active power support during the initial high-demand phase, while BESS subsequently maintains reduced power delivery until the electrolyzer safely completes its shutdown sequence.

This research demonstrates the critical importance of dynamic stability assessment for weak grid systems and validates the effectiveness of hybrid solutions combining BESS with flywheel-equipped synchronous condensers, which leverage their inertia for short-term active power reserve, to enable stable integration of large-scale renewable and electrolyzer installations.