ABB HiPerGuard MV UPS User Manual page 26

26 H I P E R G U A R D M V U P S U S E R M A N U A L
3.2.7.1 Battery sizing
The battery sizing should allow for supply outage ride-through autonomy requirements, demand response capac-
ity requirements and calendar life degradation. Battery use for utility services like demand response should al-
ways ensure the State of Charge (SOC) of the battery is above the required capacity for the MV UPS autonomy
support.
Under all modes, the HiPerGuard MV UPS maintains the output voltage at its nominal voltage level. Voltage control
and Demand Response are considered independent functions as one does not affect the other.
—
Figure 3.08: Battery SOC
3.2.7.2 Terminology
The convention for the sign of P
the battery; thus, negative references absorb power from the electrical system and charge the battery.
—
Figure 3.09: MV UPS power flow
3.2.7.3 Demand Response Operation Modes
The DR function can operate in different modes, based on the commands coming from an external DRC. Please
note that the MV UPS provides the control interface, but all the logic operations and power setpoints are provided
by the DRC. The DRC is not part of the HiPerGuard's scope of supply and can be obtained from ABB or a third party
supplier.
3.2.7.3.1 Demand Response function disabled
If the grid support function is deactivated, the grid will support the entire load power.
The HiPerGuard MV UPS will manage the battery and charge it to 100% SOC
—
Figure 3.10: MV
UPS power flow: DR
function disabled
—
P = 0
DR
is that positive references inject power to the electrical system and discharge
DR
Abbreviation Meaning
Power delivered by the grid (+grid
interjecting power / -grid absorbing
P
Grid
power)
Actual load power
P
Load
Supplied battery power (+ discharg-
P = P
Battery DR
ing / - charging)