SMA WB 5000-US - Manual (Page 7)

SMA America, LLC Turbine operation
Addendum operating requirements DBWB50-80US-UUS113611 7/12
Characteristic curve operation
As soon as the DC input voltage reaches the value defined in "VdcWindStart", the Windy Boy begins
feeding power into the grid. As you can see from the characteristic curve, the power fed into the grid
rises with the DC input voltage.
As soon as the DC input voltage reaches the value defined by the parameter , the
output power corresponds to the value defined by . If the voltage continues to increase,
the power rises according to the voltage/power curve. To emulate the typical behavior of an actual
wind turbine system, after the curve is steeper than before .
As soon as the DC input voltage reaches the value defined in the parameter "VdcWindMax", the
Windy Boy feeds the grid with the maximum possible power. If the input voltage continues to rise, the
Windy Boy continues to feed the grid at maximum power. The maximum power reflects the maximum
AC power of the Windy Boy, but this can be reduced using the "Pmax" parameter.
The characteristic curve ends at the maximum permissible input voltage of the Windy Boy, which must
never be exceeded. Do not operate the Windy Boy without using a rectifier with overvoltage
protection like the Windy Boy Protection Box.
Shutdown
If the wind strength is so low that the DC input voltage falls below the minimum voltage of the
operating range „Turbine Mode“, then theWindy Boy ceases feeding power into the grid for the
period defined in "T-Stop".
If the DC input voltage increases again, then the "T-Stop" timer is deleted and the Windy Boy will
operate according to the characteristic curve again.
If the DC input voltage remains below the minimum voltage of the operating range „Turbine Mode“
for the time defined in "T-Stop" then the Windy Boy switches off.
If the DC input voltage is no longer sufficient to supply the on-board electronics, then the Windy Boy
switches off immediately.
After the switch-off, the whole process begins anew.