SMA Windy Boy 1100, Руководство по эксплуатации

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SMA Technologie AG Turbine operation
Operating instructions WB11_17-11:FE4205 Page 31
5 Turbine operation
5.1 Overview
The Windy Boy is a single phase inverter that converts DC current into AC current
and feeds the energy generated by a wind turbine into an existing mains grid.
The Windy Boy is externally identical to the Sunny Boy inverter for photovoltaic sys-
tems.
The Windy Boy inverter has a special operational mode for wind generators howe-
ver, which allows performance adjustment to the characteristic curves of many diffe-
rent manufacturers' generators ("Turbine" operating mode). In this way maximum
yields can be obtained from your wind turbine.
The mechanical power of the wind turbine is presented to the inverter in the form of
a direct, rotation speed variable DC voltage (RPM) and current intensity (torque).
Most small wind turbines have a so-called permanent magnet generator and a down-
stream rectifier for converting the variable frequency AC generator voltage into DC
current.
5.2 Characteristic curve function
The "Turbine" operating mode of the Windy Boy uses a programmable power/volta-
ge curve to regulate the input current depending on the generator voltage (V/I cha-
racteristic curve).
Every wind generator is designed to have an optimum working point for voltage and
current, at different rotational speeds or wind speeds. This behavior is not linear.
The Windy Boy uses an approximation based on a simple ramp function. The function
can be programmed by the user so that it comes close to the behavior of the wind
generator being used and thus provides power adaptation.