SMA PPM-10 - PV Plant with 2 Power Plant Managers

4 Product Overview
SMA Solar Technology AG
Installation Manual 17PPM-10-IA-en-16
4.3.2 Large-scale PV Power Plant with 2 PowerPlantManagers
V WA
IEC 60870-5-104, DNP3 etc.
Modbus TCP, SMA Data2+
V WA
SMA POWER
PLANT MANAGER
SMA POWER
PLANT MANAGER
INTERNET
PV CENTRAL
INVERTER
GRID
OPERATOR
ROUTERHMI
POWER
ANALYZER
WEATHER
STATION
UTILITY
GRID
TRANSFORMER
AC
serial
others
BATTERY CENTRAL
INVERTER
LOADS
POWER
ANALYZER
SCADA
SYSTEM
Figure 4: System overview of a large-scale PV power plant with 2 PowerPlantManagers (example)
This system overview shows an example of the setup of a large-scale PV power plant with 2 PowerPlantManagers
(for communication via Internet, see Section4.3.1, page16).
In this system, one of the two PowerPlantManagers always has the active role and thus controls the entire plant. The
other PowerPlantManager is redundant and monitors the active PowerPlantManager. If the active system controller
can no longer control the system, the previously redundant system controller takes over active control without
interruption and within the shortest possible time. The failed system controller is automatically restarted to restore the
redundant state.
If it is impossible to restart the failed system controller, the system generates a system status message, which requests
that this system controller be replaced. The system continues to operate securely by using the intact system controller
(fail-safe operation).