LG A005KEEN261, Руководство пользователя, Страница: 72 / 74

Application Notes
AC Charging on Islanded Backup Mode
for LG Energy Storage
System (A005KEEN261)
Pre-requisites
1. Existing solar inverter should be connected
sub panel.
2. Existing solar inverter should be supported
setting value as follows.
- Ramp rate
• Soft-start ramp-up rate : under 200 W/s
• Normal ramp-up rate : under 200 W/s
- Frequency-watt mode
• Response time : 0
• Hysteresis : Disable
• Start Frequency : 60.1 Hz (Max)
• Gradient : 250 %/Hz (Min)
- L/HFRT
• High Frequency1 (HF1) : 60.5 Hz (Min)
• High Frequency2 (HF2) : 60.5 Hz (Min)
Operating procedures
1. The utility grid is black out. Then existing solar
inverter stopped.
2. ESS go to backup mode, starting discharging
and make frequency and voltage.
3. Existing solar inverter restart with soft
start ramp. : It will be restarted within 5
minutes(reconnection time)
4. Existing solar inverter can generate power to
feed backup loads.
5. ESS decrease discharging power and existing
solar inverter increase output power.
6. ESS start to control frequency when backup
loads equal with feeding power.
7. ESS can charge from solar inverter.
CAUTION
It may occur protection error because
RESU10H response time is too long for this
function.
Main Panel
Utility Grid
Backup
Loads
Existing Solar Inverter
LG ESS (AC coupled type)
Sub Panel
Main
Loads