|
|
WES Hybrid
When
sufficient wind is available in a remote, isolated grid, area
the WES Hybridsystem can reduce energy costs in a spectacular way.
Introduction:Diesel
generators are often used to produce electricity in remote areas with
isolated grids. Electricity generated in this way is expensive. Besides
the purchase price for diesel there are other specific costs
that have to be taken in to account. Costs for transport and
storage and costs of losses, for example. On top of this diesel
generators are not very efficient and will generate about 3 to 4 kWh
out of one litre of diesel. As a result the price for electrical energy
in isolated grids is high, sometimes up to 80 Euro cent per kWh.
How does it work: The hardware of a WES Hybrid wind turbine is identical to the hardware of a regular WES wind turbine. Electrical
energy is transferred from the turbine into the wind / diesel grid through an IGBT AC/DC/AC
converter in the control cabinet. The three-phase alternating current generated
by the generator is transformed to a direct current (AC/DC conversion). This direct current is converted back into an
alternating current (DC/AC conversion). The last AC/DC conversion generates an
AC current that is synchronous to the
wind / diesel grid.
|
|
|
Movie about the WES Hybrid system.
|
The
difference between the two systems is the software. The WES Hybrid
system uses the IGBT convertors to generate frequencies slightly
higher or lower than what the isolated grid is asking for. In this way
the behaviour of the diesel generator is influenced. The diesel
generator will only generate electricity when the WES Hybrid system
is not able to deliver enough. On top of this the WES Hybrid takes
full advantage of the characteristic of the a-synchronous generator and
the inertia of the spinning parts of the turbine to prevent power gaps.
There is no limitation to the number of Hybrid systems that can be
installed in one isolated grid. WES18 Hybrid systems and WES30 Hybrid
systems can both be used simultaneously in the same isolated grid.
Easy installation:A
WES Hybrid system fits in a standard foot container or truck and,
when lattice towers are being used it can be even installed without a
crane. Installing a WES Hybrid system does not take any longer than
installing a regular WES wind turbine.
Scalable:The
WES Hybrid system can be scaled easily to match your specific growing
energy requirements. There is no limitation to the number of WES18 or
WES30 Hybrid systems you can combine in one wind/diesel grid, nor is
there a limitation to the number of diesel generators in the
wind/diesel grid. The diesel generators and the WES Hybrid systems do
not have to be installed near each
other, they can be installed (even with step-up and step-down
transformers) a long way apart from each other. The system works as
long as all is connected to the same wind/diesel grid.
Cost effective:The WES Hybrid system is cost
effective. The WES Hybrid collaborates with the diesel generators
without the need for additional hardware (such as: a flywheel, dumpload,
battery storage, data lines, sensors and central energy management system).
A grid connection is the only connection needed for a WES Hybrid to deliver
energy into the isolated grid and start reducing energy costs.
Example calculations:
Example calculations for a WES18 Hybrid system can be found at the bottom of this page Example calculations for a WES30 Hybrid system can be found at the bottom of this page
|
