GE DMC490 Software Configuration Manual page 22

DMC490 Microgrid Controller Software Configuration Guide
Enabled Specify if the asset is to be included in the microgrid optimization
calculations.
Rated Power Specify the maximum power generation capacity of the
(kW) dispatchable resource in kW.
Minimum Specify the preferred minimum power, in kW. For example, some
Power (kW) generators need to be operated at a minimum of 30 percent of their
rated power, expressed in kW.
Efficiency Specify the efficiency at maximum generator power, in kWh per kg
Maximum of fuel consumed. Calculate the number using the related curves for
(kWh/kg) your generator. If the dispatchable efficiency at maximum power is
available in terms of percent, this setting can simply be determined
by multiplying the percent value with the higher heating value or
energy content of the input fuel in terms of kWh/kg. Higher heating
values for different fuel sources can be found in the related
handbooks or the Internet.
Efficiency Specify the efficiency at minimum generator power, in kWh per kg
Minimum of fuel consumed. Generators are usually less efficient when
(kWh/kg) operating at low loads. Calculate the number using the related
curves for your generator. If the dispatchable efficiency at minimum
power is available in terms of percent, this setting can simply be
determined by multiplying the percent value with the higher heating
value or energy content of the input fuel in terms of kWh/kg. Higher
heating values for different fuel sources can be found in the related
handbooks or the Internet.
Start Cost ($) Specify the cost to power up the resource. Include the costs that
you think are important based on your experience with the
microgrid. The cost is in dollars; for other currencies simply enter
that value and be consistent in all fields involving the currency.
Stop Cost ($) Specify the cost to power down the resource. The cost is in dollars;
for other currencies simply enter that value and be consistent in all
fields involving the currency.
Specify the cost of fuel that operates the dispatchable generator, in
Fuel Cost ($/L)
dollars per liter. For example, enter the price for a liter of diesel fuel
or gasoline. The volume of gaseous fuels is usually expressed in
terms of Normal cubic meter (Nm3). Therefore, Fuel Cost of
dispatchable generation resources running on gaseous fuels can
also be expressed in terms of dollars per Nm3; however, in this
case, Fuel Density also needs to be in terms of kg per Nm3. The cost
is in dollars; for other currencies simply enter that value and be
consistent in all fields involving the currency.
Fuel Density Specify the specific gravity of fuel in kg per liter. Values differ based
(kg/L) on the fuel type, such as natural gas and diesel. Use reference
books or the Internet to determine this value. Examples are 0.832
kg/L for diesel, 0.745 kg/L for ethanol-free gasoline, 0.71 to 0.77
kg/L for gasoline, and 0.41 to 0.5 kg/L for liquefied natural gas (LNG).
Fuel Density can also be expressed in terms of kg/Nm3, which is
common for gaseous is case, Fuel Cost also needs to be expressed
in terms of $/Nm3. The unit of volume in both Fuel Cost and Fuel
Density settings need to be the same.
22
Disabled Enabled
Enabled
0 to 250 kW
1,000,000
kW
0 to 50 kW
1,000,000
kW
0 to 1,000 0.75
kWh/kg kWh/kg
0 to 1,000 0.55
kWh/kg kWh/kg
$0 to $10
$1,000,000
$0 to $10
$1,000,000
$0 to $100 $1
0 to 1,000
0.85 kg/L
kg/L