NIGHTHAWK ENERGY STORAGE

Page | 143

Trip Point OF Trip TTme 3
Instantaneous OF Trip
Frequency Range 40 Hz-70 Hz
40 Hz-70 Hz
Time (sec) 0 -600
Instantaneous
ELECTRICAL SPECIFICATIONS T Notes
0.1 Hz and 0.01 second resolution
0.1 Hz resolution, filtering as necessary
2.4.1.5 Anti-Islanding Features
The Megapack inverter includes these anti-islanding features:
Reconnection delay timer
Active anti-islanding: Sandia Frequency Shift implemented on all systems
Passive anti-islanding: Configurable Rate of Change of Frequency (ROCOF) preferences
The reconnection delay timer is configurable with the following settings:
Table 10. Reconnection Delay Timer Default Settings
Feature Name
Default
300sec
Reconnect Delay
Reconnect
Voltage
Reconnect Voltage
Reconnect
Frequency
Reconnect
Time
Min.
Max.
Min.
Max.
88.33%
Effect
The amount of time Megapack waits before reconnection, after the grid returns w ithin the frequency and voltage ride- through windows defined above
The minimum voltage at which Megapack interprets the grid is within tolerable conditions
The maximum voltage at which Megapack interprets the grid is within tolerable conditions
The minimum frequency at which Megapack interprets the grid is within tolerable conditions
The maximum frequency at which Megapack interprets the grid is within tolerable conditions
Setting Range
0 -600 sec
0-150%
0-150% 105.83% 40-70 Hz 59.3 Hz 40-70 Hz 60.5 Hz
Frequency
Sandia Frequency Shift is enabled by default, but can be disabled if required for the application. ROCOF is
configurable with the following settings:
Table 11. ROCOF Settings Feature Name Effect
ROCOF Enable Turns ROCOF on or off
ROCOFFaultLimit Setstherateofchangerequiredforatrip
ROCOF Time Delay Sets how long the rate of change has to be present for the inverter to trip
2.4.1.6 Inverter Configurations
Setting Range Default n/a Off
0.1-100.0Hz/sec 1Hz/sec 0-1 second 1second
The configurations listed below are example inverter configurations. Megapack can be requested to be factory-configured with other current limits lower than the maximum below to de-rate to meet particular prefect needs. Any multiple of 100 kVA over and including 300kVA is available as a factory configuration.
The Megapack inverter should be configured with a kVA rating at least 60 kVA (2-hour systems) or 25 kVA (4-hour systems) higher than the site requirement, to ensure the Megapack can supply enough AC current to simultaneously run the thermal system and discharge in accordance with commands.
Megapacks with fewer battery modules will have a lower absolute maximum. as indicated in Battery Module Configurations on page 10.
M<>gapack 2 XL Specification - Rev 1.6.4 CONFIDENTIAL INFORMATION • SHARED UNDER NOA ONLY 9