Other
Components
A
capacitor is used to store electrical energy. It consists of terminals
that connect to two metal plates separated by a dielectric that prevents
the plates from touching each other.
Source
Vestas training 2005
The capacitor
is charged to the greatest potential present on the grid , and if the
level falls in the circuit, the capacitor automatically releases electrons
to 'replace' the deficit. This results in less ripple in the current,
improving the quality.
A transformer
allows electricity to be transferred over extensive distances. The step
up transformers used in wind power generating plants changes the voltage
of the electricity received on the primary windings side of the transformer
to a higher voltage on the secondary windings. The efficiency of the
transformer allows for destinations not in close proximity to the electric
generating plant to receive energy.
•
A thyristor is a solid state semi-conductor device similar to a diode,
consisting of an additional terminal used to switch it on. As long as
there is sufficient current running through the thyristor it will remain
on. Silicon controlled rectifiers and thyristors are identified as synonymous
The thyristor contains 2 transistors.
A transistor works like a valve which can open/close the current continuously
according to the input signal (trigger signal). The thyristor is used
with power factor correction to give a smooth transition of full load
current from the generator to the grid and to smooth start larger electric
motors. The value of the trigger signal is increased gradually and allows
more and more current/power to pass from the generator to the grid (Vestas
training module GB110-001).
Source
Vestas training 2005
