SMA WB 5000-US - Manual (Page 9)

SMA America, LLC Turbine operation
Addendum operating requirements DBWB50-80US-UUS113611 9/12
3.3.1 General Example Settings
• "Vpv-Start" is set approximately to its minimum:
This results in early activation of the Windy Boy.
• "VdcWindStart" is set to the lower limit of the Windy Boy's input voltage range:
This results in early grid feeding.
• "P-Wind-Mid" is set to approximately
1
/
5
of the Windy Boy's maximum AC power.
• "VdcWindMid" is set in the lower third of the voltage range between "VdcWindStart" and
"VdcWindMax":
The selection of this point divides the curve into a weak and a strong wind range, and is decisive
for optimal adjustment of output according to your wind turbine. It is to be noted that the curve
is flat in the weak wind range, and climbs more steeply in the strong wind range. The flat curve
in the weak wind range prevents the wind turbine from "braking" due to excessive power
extraction, and thus provides good startup properties.
The steeper curve section causes a strong increase in power extraction upon higher DC input
voltages. This behavior corresponds to typical wind turbine properties.
• "VdcWindMax" is set to the rated voltage of the turbine that has the maximum power:
Once the properties of the wind turbine are known, reduction of the "VdcWindMax" parameter
may be advisable, in order to extract the maximum power from the wind turbine even at low
DC input voltages (low wind speeds). The second curve section then increases more steeply.
• "Pmax" is set to the wind turbine's maximum output power:
This allows the Windy Boy's maximum AC power to be optimally adjusted to the wind turbine
used. This prevents the generator from being overloaded by excessive power extraction.
• "T-Stop":
"T-Stop" defines the deactivation delay, befor the Windy Boy disconects from the grid, if the
DC input voltage is below the feed-in conditions.
• "T-Start":
This shortens the period waited before activation (please observe the regulations of the local
energy supplier).
The following example represents a starting point for the operation with a wind
generator.
Contact the manufacturer of your wind generator for information on its typical properties
(voltage/power characteristic).