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Synchronous
Generator |
This is a multi-pole variable speed generator. Due to this and Power electronics the Gear Box which steps up the speed to meet the speed of Induction Generator is eliminated resulting in reduced transmission losses, and elimination of wear and tear of the Gear Box and oil leakage associated with it The Rotor-Hub is directly connected
to the Generator Rotor by the
Axle pin thus eliminating the
Gear Box and couplings. The speed
of the generator Rotor is the
speed of the Hub Rotor, which
is 45 RPM maximum for E-33 and
31.5 RPM maximum for E-48. Thus
it rotates at 40 and 30 times
lower speed than the Gear Box
type Turbines, hence, very low
wear and tear.
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The Synchronous Generator of
Enercon with its electronics
provides an excellent operational
band width i.e.
Voltage 415 ± 20%
V Frequency 50 ± 5 Hz.
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Pitch Regulation |
Enercon Machines are continuous
pitch regulated machines i.e.,
the Blade feathers on its axis
as per the requirement of the
angle of attack to achieve optimum
efficiency at all wind speeds.
Due to this the yield of the Electric
Energy Generated is higher.
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Reactive Power (RKVAH)
In case of Induction Generators the Reactive Power (RKVAH) Consumption is very high especially when the generation is low to medium, as well as these Turbines are a strain on the Grid systems of the State Electricity Boards.
They consume RKVAH to the extent of 45% to 60% of the kwh generated. The State Electricity Boards of Karnataka, Maharashtra,
Tamil Nadu, Andhra Pradesh, Gujrat
and Madhya Pradesh have imposed a penalty
of Re
0.25 To Re 1.00 for drawl of every Unit of RKVAH which is an additional cost for the owners of the wind farms. Also the State Electricity Boards have to spend for additional capacitor banks at their sub-station to meet the requirements of Reactive Power whenever conventional types of Wind Energy Converters i.e., with Induction Generators are used.
Enercon's Synchronous Generator with its power electronic helps in generating RKVAH the extent of 0.95 lead of the Active power which actually helps the Grid System, and drawal of RKVAH is marginal.
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Salient features of the Enercon Technology:
The Enercon machine employs three independent Aerodynamic Brakes. Each Blade turns on its own axis simultaneously and comes to such a position that the airflow is almost bypassed i.e., the lift force is considerably reduced, thereby bringing the Turbine to almost standstill condition.
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Awards
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News
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Enercon India Limited
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