SMA WINDY BOY - Manual (Page 14)

Settings SMA Solar Technology AG
14 WBSetup-BEN100411 User Manual
5.4 Adjusting the power curve
There are two different ways that the software calculates the power curve of the inverter.
• Calculation from nodes
or
• Calculation from Coefficients
Select whether the power curve is to be calculated from "Nodes" or from "coefficients" in the
"Calculation from" option field and set the marker to "Nodes" or "coefficients".
If you have taken over the factory-installed parameters as described in section 5.1 ”Taking over the
inverter factory settings” (page 12), the coefficients (Wind_a
0
to Wind_a
3
) are automatically
adjusted in the "Parameters" value range. In this case you can let the power curve be calculated from
coefficients.
5.4.1 Entering nodes
Enter the values of the nodes for the appointed wind turbine system in the "Nodes" value range. Enter
all 7 nodes to construct an optimal power curve
If you want to construct a power curve with e.g. only 3
nodes (carryover of the 3 point characteristic curve),
enter the first point several times in the "Nodes" value
range (see figure).
Once you have entered the values for the individual nodes the power curve is displayed adjusted in
the diagram and the software calculates the coefficients (Wind_a
0
to Wind_a
3
) automatically, these
finally being transferred to the "Parameters" value range. You can adjust the coefficients to your wind
turbine system more exactly once they have been calculated.