Huawei SmartLogger2000 User Manual page 183

SmartLogger2000-(10-C, 11-C)
User Manual
real-time adjustment modes, precision of adjustment commands, and communication
reliability. Besides power adjustment, power grid companies also require each PV plant to
provide key sampling data of grid connection points in time.
Each SmartLogger can be connected to a maximum of 200 devices, among which the number
of SUN2000s cannot exceed 150. If there are too many SUN2000s to be handled by one
SmartLogger in the AI/DI scheduling scenario, a certain number of slave SmartLoggers are
required. The master SmartLogger receives a remote scheduling command from a power grid
company over the AI/DI port, and then sends it to all slave SmartLoggers. These slave
SmartLoggers broadcast the command to all SUN2000s.
Figure 8-13 AI/DI scheduling
If a slave SmartLogger is configured in the system, SUN2000s should be connected to the
slave SmartLogger instead of the master SmartLogger. Otherwise, SUN2000s that connect to
the master SmartLogger cannot execute the power grid scheduling command.
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Issue Draft A (2017-02-15)
The master SmartLogger connects to the slave SmartLogger over the Ethernet. The slave
SmartLogger functions as the network device for the master SmartLogger.
If a slave SmartLogger is to be connected, you must add the slave SmartLogger over the WebUI of
the master SmartLogger.
The master SmartLogger forwards the scheduling commands sent by the remote terminal
management system to all slave SmartLoggers. The slave SmartLoggers send the commands to the
connected SUN2000s.
The power and voltages at the grid connection point collected by the power meter are compared with
the scheduling commands from the power grid company to verify that the PV plant operates in
accordance with requirements of the power grid company.
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8 Power Grid Scheduling
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