SMA WB 5000A-11 Installation - Manual (Page 47)

SMA Solar Technology AG Electrical Connection
Installation Manual WB5A_6A-IA-IEN114540 47
5.8 Polynomial Curve
The polynomial curve is a programmable power curve depending on the DC input voltage.
By adapting the default polynomial curve to the small wind turbine system being used, you can
optimize the energy output of the small wind turbine system.
To adapt the polynomial curve of the inverter to the small wind turbine system being used, you should
change the following parameters on the PC with the "Windy Boy Setup Tool" (www.SMA.de/en):
• Vpv-Start
• UdcWindStart
• Wind_a0 ... Wind_a3
• Pmax
• P-Wind-Ramp
• KP-Wind-Reg
• KI-Wind-Reg
• T-Stop
A description of the operating parameters is available in the download area at www.SMA.de/en in
the category "Technical Description" of the respective inverter.
The inverter regulates its output power according to the generator voltage. The following diagram
shows the function of a typical polynomial curve in a WB 5000A/WB 5000A-11/WB 6000A/
WB 6000A-11. Here, the AC power fed in is depicted as a function of the DC input voltage of the
inverter.