SMA DATA MANAGER L, Руководство по эксплуатации

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4 Product Overview SMA Solar Technology AG
Operating manual EDML-10-BE-en-13 19
Energy monitoring
Several SMA Energy Meters and Modbus energy meters from other manufacturers can be
connected for comprehensive energy monitoring. The product can also read out, save and display
the generation and consumption data of the meters.
In addition, energy meters (e.g. a gas meter) can be registered via the extended functions in
Sunny Portal. The meter readings can be entered manually and displayed.
FTP Push
The FTP Push function can be used to upload collected system data to a freely selectable external
FTP server. The collected system data is uploaded to the specified folder up to 1 time per hour per
day. Here, the system data is exported in an unchangeable XML format. The system data and user
data is transmitted via standard FTP protocol to the FTP server without encryption.
Grid management services
The product is equipped with service functions for grid management.
Depending on the requirements of the grid operator, you can activate and configure the functions
(e.g. active power limitation) via operating parameters.
The setpoints from the grid operator can either be implemented via open-loop control or closed-
loop control. The setpoints are specified via Modbus, analog or digital signals or manually via the
user interface. The implementation of the setpoints is reported back to the grid operator.
Active power limitation
The setpoint for active power limitation is specified in percent. The total system power is taken as
the reference value. The setpoints are specified via Modbus, analog or digital signals or manually
via the user interface.
Zero export
Some grid operators permit connection of PV systems only on condition that no active power is fed
into the utility grid. The PV energy is therefore consumed exclusively at the place where it is
generated.
When specifications at the point of interconnection are actively controlled, this product enables the
limitation the active power feed-in for the connected SMA inverters and of third-party inverters to
0% as long as these are connected via SunSpec Modbus and support this function.
Reactive power control
The reactive power control can take place through direct parameter settings (Q, cos φ) in the
installation assistant or a variable specification from the grid operator via the Modbus interface or
via analog signals. The reactive power control as characteristic curve function can also be
regulated as a function of the voltage at the point of interconnection Q(V). The values are specified
as a percentage of the maximum AC power. A proper meter for measuring the relevant electrical
variables (V, P, Q) is required at the grid-connection point. A pure voltage measurement is not
sufficient. A suitable energy meter is also required at the point of interconnection for cos φ
specifications in control mode.