WIND-DIESEL HYBRID POWER SYSTEMS

For remote communities that are not directly connected to an electricity grid generally diesel engines linked generating sets have often been the sole source of power as they offer a high degree of reliability. Given the remoteness of many of these locations it is probably unlikely that they will be connected to a grid in the future. This has begun to change with the introduction of wind-deisel hybrid systems.

History

Wind-Diesel generating systems have been under development and trialed in a number of locations during the latter part of the 20th century. A growing number of viable sites have now been developed with increased reliability of the systems. This is key to their succes as minimising the cost of technical support in remote communities is vital for the ongoing development and implementation of this technology.

Technology

The successful integration of wind energy with diesel Gen-sets relies on complex controls to ensure correct sharing of intermittent wind energy and controllable diesel Gen-set to meet the demand of the usually variable load.
The common measure of performance for wind diesel systems is Wind Penetration which
is the ratio between Wind Power and Total Power delivered, e.g. 60% wind penetration implies that 60% of the system power comes from the wind. Wind Penetration figures can be either peak or long term.
Sites such as Mawson, Coral Bay and Bremer Bay have peak wind penetrations of
around 90%.
Technical solutions to the varying wind output include controlling wind output using variable
speed Wind Turbines (e.g. Enercon, Denham), controlling demand such as the heating load (e.g. Mawson),
storing energy in a flywheel (e.g. Powercorp, Coral Bay).

Isolated communities utilising commercial Wind-Diesel hybrid systems with significant proportion from wind

Community	Country	Diesel Mw	Wind Mw	Community Population	Date Commissioned
Denham	Australia		0.69 MW		1998
Osmussaare	Estonia		0.40 MW		2002
Wales	America		0.40 MW	160	2002
Ramea	Canada		0.40 MW	600	2003
Mawson	Antartica		0.30 MW		2003
Hopetoun	Australia	1.37 MW	0.60 MW	350	2004
Rottnest Island	Australia	0.64 MW	0.60 MW		2005
Bremer Bay	Australia	1.28 MW	0.60 MW	240
Coral Bay	Australia	2.24MW	0.60MW		2007

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WIND-DIESEL HYBRID POWER SYSTEMS

History

Technology

Isolated communities utilising commercial Wind-Diesel hybrid systems with significant proportion from wind

See also

Power generation

Green energy

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