  Hydrogen electrolyzers, with their operational flexibility, can be configured
as smart dynamic loads which can provide grid services and facilitate the
integration of more renewable energy sources into the electrical grid. However,
to enable this ability, the electrolyzer system should be able to control both
active and reactive power in coordination with the low-level controller of the
electrolyzer via the power electronics system interface between the utility
grid and electrolyzer. This paper discusses power converter topologies and the
control scheme of this power electronics interface for electrolyzer
applications to enable electricity grid services. For the sake of unity, in
this paper, we consider the power converter system interfacing the utility grid
at the line-to-line root mean square RMS value of 480 VAC 60 Hz and supplying
to the 3500 A 750 kW PEM electrolyzer stack.
