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Topic Title: Grid Connected Energy Storage
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Created On: 09 November 2012 08:42 AM
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 09 November 2012 08:42 AM
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rogerbryant

Posts: 854
Joined: 19 July 2002

An interesting article from The Engineer:

http://www.theengineer.co.uk/i...uzzle/1014536.article

Once again it looks like a significant part of the problem is 'political' rather than technical.

Best regards

Roger
 09 November 2012 05:53 PM
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jarathoon

Posts: 1033
Joined: 05 September 2004

Roger,

There was an IET event I attended in 2011 called

"Energy Storage: A pragmatic Approach"

The talks are on IET TV, some are very good.

The one most relevant to the efficient siting of storage is

"Developing operation strategies for electrical energy storage systems in future distribution networks"
Prof Philip Taylor, DONG Energy Professor of Renewable Energy, Deputy Director Durham Energy Institute

http://tv.theiet.org/technology/power/12018.cfm

A viable economic model for energy storage on the various timescales needed has yet to be established as was pointed out in another talk. So the problem is still an open one.

The grid operator will want to keep all energy supply on grid. However if we end up paying wind farm generators not to supply wind energy to the grid on a regular basis, then this is a waste of consumers money and a waste of energy. This energy could otherwise be put to some productive use off grid.

National Grid says that the curtailment of wind energy is unlikely to happen on a regular basis. However the only way of giving them a strong incentive to stop this from happening, is to force National Grid shareholders to pay the costs of grid curtailed electricity, not consumers. Without safe guards such as this, allowing some off grid electicity supply networks to benefit from the wind electricity National Grid rejects seems a sensible suggestion to me.

James Arathoon

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James Arathoon
 10 November 2012 03:37 PM
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acsinuk

Posts: 153
Joined: 30 June 2007

We can agree with the idea that too much solar or wind generation at the end of line may cause problems to the REC's voltage limits
BUT this is dodging the real issue which is how can we store the excess energy until it is needed in the evenings. Using batteries and inverters is smart but hugely expensive and used on critical loads for a few minutes only, whilst un-green standby diesel generators are run up!!
Traditional pump storage systems appear to be the best alternative but who is going to fund that? Natgrid shareholders. It is much better to have a regular 24/7 green energy source like nuclear or reliable tidal energy and avoid the necessity for storage all together.
CliveS
 15 November 2012 09:40 PM
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iamck

Posts: 10
Joined: 16 September 2001

The Ontario electricity system has a problem with what they refer to as Surplus Baseload generation. They have a paper at https://www.ieso.ca/imoweb/pubs/consult/se91/se91-20120808-SBG_Explanation_FPFG.pdf which summarises their experience. It is worth a read.

Iain McKenzie

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iamck
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