Power Quality from Wind Turbines
people think of the controller as the unit which runs the wind
turbine, e.g. yaws it against the wind, checks that the safety
systems are OK, and starts the turbine.
The controller does indeed do all these things,
but it also looks after the power quality of the current generated
by the wind turbine.
Connection and Power Quality
In the section about power
quality you will learn how electricity companies require
that wind turbines connect "softly" to the grid, and
how they have certain requirements that the alternating current
and voltage move in step with one another.
The image to the right shows the high voltage
section of a controller for a megawatt machine. This part of
the controller operates e.g. the thyristors
which ensure soft coupling to the electrical grid.