SMA PPM-10 - Large-Scale PV Power Plant with 2 Power Plant Managers and 1 Redundancy Connector

4 Product Overview
SMA Solar Technology AG
Installation ManualPPM-10-IA-en-1618
4.3.3 Large-scale PV Power Plant with 2 PowerPlantManagers and
1RedundancyConnector
IEC 60870-5-104, DNP3 etc.
Modbus TCP, SMA Data2+
V WA
SMA POWER
PLANT MANAGER
SMA POWER
PLANT MANAGER
V WA
REDUNDANCY
CONECTOR
INTERNET
PV CENTRAL
INVERTER
GRID OPERATOR
ROUTERHMI
POWER
ANALYZER
UTILITY
GRID
TRANSFORMER
AC
others
BATTERY
CENTRAL
INVERTER
LOADS
POWER
ANALYZER
SCADA
SYSTEM
Figure 5: System overview of a large-scale PV power plant with 2 PowerPlantManagers and 1 Redundancy Connector (example)
This system overview shows an example of the setup of a large-scale PV power plant with 2 PowerPlantManagers
with the Redundancy Connector (for communication via Internet, see Section4.3.1, page16). Joint operation of both
PowerPlantManagers, including the role change in case of a fault, works the same way as for a large-scale PVpower
plant with 2PowerPlantManagers.
For the use of digital inputs and outputs, such as with a medium-voltage switchgear, the RedundancyConnector is
recommended. The RedundancyConnector ensures a complete decoupling of the digital inputs and outputs. With this
decoupling, an active PowerPlantManager that keeps a digital output closed, can be replaced by the redundant
PowerPlantManager. After this replacement, the now active PowerPlantManager can open and close this output
regardless of the previous switch status. The system continues to operate securely by using the active system controller
(fail-safe operation) just as with a large-scale PV power plant with 2 PowerPlantManagers. Only the active
PowerPlantManager controls the Redundancy Connector.