© Copyright Mission Critical Energy Inc, 2019 Version 1-2019
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9.4 Over-Speed Protection
The Superwind 350/48V is
equipped with a rotor control
system which incorporates an
over speed control mechanism.
The over speed controller
works at all wind speeds, even
without an electrical load on the
turbine. Although it is
not a normal operational mode,
an unloaded turbine
(meaning the turbine is
disconnected from the
batteries) could occur under
certain conditions (e.g. blown fuses, malfunction of the charge regulator or electrical
failures caused by overvoltage or a lightning strike). It is important to avoid an
unloaded turbine condition at all times. The rotor control system responds to both
aero dynamical and centrifugal forces affecting the rotor blades. Due to the special
geometric rotor blade layout and matched rotor controller mechanism, the rotor at no-
load operation first accelerates to an increased idle-speed. The idle-speed will be kept
on a nearly constant level, speeding up only slightly during increases in wind speed.
In this way the rotor control system provides extra protection against high centrifugal
forces during no load operation, ensuring a very high level of safety and survivability
9.5 Annual Power Production
In DC-systems the electrical
power is the product of voltage
and current. Actual output
however, is a function of
generator speed and the load
connected, including the battery
state of charge (i.e. the electric
resistance of the consumers,
including the battery).
Therefore, the actual annual
power produced will be
determined by the wind
conditions at your site in
combination with what is being
powered and/or the battery bank being charged.
Fig. No. 9.5 shows the annual power production versus Rayleigh distributed annual
mean wind speeds.
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