GE DMC490 Software Configuration Manual page 25

Output Enabled This setting indicates if the storage output/discharge is set to
be included in the microgrid optimization calculations by the
DMC490. For hydrogen storage, which is interpreted as the
combination of electrolyzer, high-pressure storage cylinders,
and fuel cell, enabling the output translates to enabling the
fuel cell.
Storage Type Specify if the storage is batteries or a hydrogen-based system,
such as the combination of electrolyzer, high-pressure storage
cylinders, and fuel cell.
Maximum Specify the maximum electrical power in kW that the storage
Discharging unit can discharge to the microgrid. For hydrogen storage,
Power (kW) which is interpreted as the combination of electrolyzer, high-
pressure storage cylinders, and fuel cell, this setting refers to
the rated power of a fuel cell.
Minimum Specify the minimum electrical power in kW that the storage
Discharging unit is to discharge to the microgrid. For hydrogen storage,
Power (kW)
which is interpreted as the combination of electrolyzer, high-
pressure storage cylinders, and fuel cell, this setting refers to
the minimum fuel cell output power.
Maximum Specify the maximum input/charging power of the storage
Charging Power unit in kW. For hydrogen storage, which is interpreted as the
(kW) combination of electrolyzer, high-pressure storage cylinders,
and fuel cell, this setting refers to the rated power of the
electrolyzer.
Minimum Charging power for a storage device cannot be below a
Charging Power certain level, so Specify the minimum input/charging power of
(kW) the storage unit. This power level is related to the technology
and specifications of the storage device itself and it does not
depend on other dispatchable or renewable devices in the
system. For hydrogen storage, which is interpreted as the
combination of electrolyzer, high-pressure storage cylinders,
and fuel cell, this setting refers to the minimum input power of
the electrolyzer.
For example, for a 300 kW alkaline electrolyzer, this setting
can be in the range of 120 to 130 kW.
Charging This setting describes how efficient the input or charging
Efficiency (%) power over time contributes in increasing the state of charge.
Charging efficiency depends on the input/charging power and
storage state of charge. However, it is assumed here to be a
fixed setting, which is acceptable in most applications. For
hydrogen storage, which is interpreted as the combination of
electrolyzer, high-pressure storage cylinders, and fuel cell, this
setting refers to the electrolyzer efficiency. (The charging
efficiency of the storage cylinders is close to unity.)
Discharging This setting describes how efficient the stored energy is
Efficiency (%) converted back to the microgrid. Discharging efficiency
depends on the output/discharging power and storage state
of charge. However, it is assumed here to be a fixed setting,
which is acceptable in most applications. For hydrogen
storage, which is interpreted as the combination of
electrolyzer, high-pressure storage cylinders, and fuel cell, this
setting refers to the fuel cell efficiency. (The discharging
efficiency of the storage cylinders is close to unity.)
DMC490 Configuration
Disabled Enabled
Enabled
Hydrogen Battery
Battery
0 to 1,000,000 50 kW
kW
0 to 1,000,000 25 kW
kW
0 to 1,000,000 50 kW
kW
0 to 1,000,000 25 kW
kW
0% to 100% 50%
0% to 100% 55%
25