SMA WB 3600TL - Manual (Page 49)

SMA Solar Technology AG Electrical Connection
Installation Guide WB36TL_50TL-IEN102011 49
5.6.3 Polynomial Characteristic Curve
The polynomial characteristic curve is a programmable power curve depending on the DC input
voltage. By adapting the default polynomial characteristic curve to the small wind turbine system
being used, you can optimize the energy output of the small wind turbine system.
To optimally adapt the polynomial characteristic curve of the inverter to the wind turbine system being
used, you can change the following parameters on the PC with the "Sunny Explorer" software
(www.SMA.de/en/Products/Software):
• Critical voltage to start feed-in
• Critical voltage for end feed-in
• Power characteristic curves coefficient for Udc^0 …
Power characteristic curves coefficient for Udc^3
• Currently set active power limit
• Power controller settings kp component
• Power controller settings ki component
• Power controller settings kd component
• Deactivation delay
A description of the operating parameter 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 illustration
shows the function of a typical polynomial characteristic curve of a WB 3600TL / WB 5000TL.
Here, the fed-in AC power is shown according to the DC input voltage of the inverter.