SMA solar inverter 3 phase operation manual part 3
Interfaces and Functions
The inverter can be equipped or retrofitted with the following interfaces and functions: SMA Speedwire/Webconnect
The inverter is equipped with SMA Speedwire/Webconnect as standard. SMA Speedwire/Webconnect is a type of communication based on the Ethernet standard. This enables inverteroptimized 10/100 Mbit data transmission between Speedwire devices in PV systems and the software Sunny Explorer. The Webconnect function enables direct data transmission between the inverters of a small-scale system and the Internet portal Sunny Portal without any additional communication device and for a maximum of 4 inverters per Sunny Portal system. In large-scale PV
power plants, data transmission to the Internet portal Sunny Portal is carried out via the SMA Cluster Controller. You can access your Sunny Portal system from any computer with an Internet connection.
Webconnect enables – for PV systems operated in Italy – the connection or disconnection of the inverter to or from the utility grid and the specifying of the frequency limits to be used via IEC61850-GOOSE messages.
The inverter can communicate via cables with special SMA communication products via the RS485 interface (information on supported SMA products at www.SMA-Solar.com). The RS485 interface can be retrofitted and can be used in place of the SMA Speedwire/Webconnect interface in the inverter.
The inverter is equipped with a Modbus interface. The Modbus interface is deactivated by default and must be configured as needed. The Modbus interface of the supported SMA devices is designed for industrial use and has the following tasks:
• Remote query of measured values
• Remote setting of operating parameters
• Setpoint specifications for system control
Grid Management Services
The inverter 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.
SMA Power Control Module The SMA Power Control Module enables the inverter to implement grid management services and is equipped with an additional multifunction relay (for information on installation and configuration,
see the installation manual of the SMA Power Control Module). The SMA Power Control Module can be retrofitted.
You can configure the multifunction relay for various operating modes. The multifunction relay is used, for example, to switch fault indicators on or off (for information on installation and configuration, see the installation manual of the multifunction relay). The multifunction relay can be retrofitted.
SMA OptiTrac Global Peak
SMA OptiTrac Global Peak is an advancement of SMA OptiTrac and allows the operating point of the inverter to follow the optimal operating point of the PV array (MPP) precisely at all times. In addition, with the aid of SMA OptiTrac Global Peak, the inverter detects several maximum power points in the available operating range, such as may occur particularly with partially shaded strings. SMA OptiTrac Global Peak is enabled by default.
Surge arrester type II
Surge arresters limit dangerous overvoltages. Surge arresters of type II can be retrofitted (for details on the installation refer to the service manual of the inverter at www.SMA-Solar.com).
Q on Demand 24/7
The inverter can supply reactive power by means of Q on Demand 24/7 covering the entire unit circle around the clock (for details on the configuration refer to the Technical Information “Integrated Plant Control and Q on Demand 24/7” at www.SMA-Solar.com).
Integrated Plant Control
The inverter can display the Q(V) characteristic curve specified by the grid operator by means of Integrated Plant Control without measuring on the grid-connection point. The inverter can automatically compensate equipment installed between the inverter and the grid-connection point after having activated the function (for information on the system configuration refer to the Technical Information “Integrated Plant Control and Q on Demand 24/7” at www.SMA-Solar.com).