SMA Windy Boy WB 1100LV, Руководство пользователя

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SMA Technologie AG Unit Description
User Manual WB1100LV-11:FE2606 Page 11
4 Unit Description
4.1 Appropriate Usage of the Windy Boy
The Windy Boy is designed for the conversion of rectified DC voltage from a wind
turbine (permanent magnet generator) into alternating current for feeding into the public
grid. The technical data is described in more detail in section 9 "Technical Data" (Page
51).
Many wind turbine system manufacturers offer an extra overvoltage protection module.
This component prevents the destruction of the downstream Windy Boy in the event of
overvoltage.
Overvoltages can occur under the following conditions:
•
High turbine rotation speeds under strong wind conditions.
• An increase in turbine rotation speed caused by load-shedding when the Windy
Boy is disconnected from the grid, e.g. in the event of grid faults or power outages.
The overvoltage protection system has the following tasks:
•
When a pre-defined voltage is reached, the Windy Boy is disconnected from the
generator and a short-circuit slows the generator and/or brings it to a standstill.
• Some devices reduce the turbine rotation speed, and thus the generator output
voltage, by switching on a resistor (dumpload). The electrical energy generated
by the turbine is then converted to heat.
In grid-connected systems, we recommend the use of one of the electronic protection
mechanisms described here. Note that overvoltage at the Windy Boy can lead to
destruction of the device. In addition to this, you lose the right to all warranty claims -
even if the maximum input voltage of the Windy Boy is only exceeded for a short time.
Overvoltage protection
Rectifier Windy Boy Public
grid
Wind
turbine