by FishAreBest » Tue 31 Jul 2007, 07:35:38
$this->bbcode_second_pass_quote('Tanada', 'A')ny company forced to install intermitent sources has to keep and maintain full capacity in fossil sources AND maintain the intermittent sources that are variable in availibility.
This isn't how it works in the real world.
The grid operator has to *balance* supply and demand. This is done by manipulating *both* these factors.
The market allows users of electricity to "not consume" their contracted power - for a price. If the marginal cost of this "non-consumption" is less than the cost of bringing additional generation on-line, it becomes the prefered option.
To use a simple example, suppose you have a warehouse which stores frozen food. You can quite happily turn the freezers off for a few hours without the temperature of the food rising. It then has the option of being a "virtual generator". For a price, it can bring additional capacity to the network during peak periods.
Also, very large users (e.g. Steel Mills) have supply contracts that are based on market prices, not a fixed price. As supply goes down (e.g. the wind stops blowing), the price goes up and the Steel Mills shut down for a while. This has always happened. Increasing the renewable mix may make this more frequent, but it is nothing new.
You simply need to use the power when it is available, not when you want it. It's like your grandmother doing the washing on dry/windy days, rather than your mother putting the clothes in the hot-air dryer.