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OK, I think I see what you're saying.
To elaborate on what I was saying though, there are basically two types of power generation capability:
"Base load" generation, which is always on-line and which deals with the the power requirements that are there 24/7. Such plants include coal, and nuclear plant - you can't just "switch off" a coal power station if it's not needed, or stop feeding coal into it. It takes days to safely shut it down.
"Transient" generation capacity, which can quickly be brought on-line and taken off-line to satisfy short-term power requirements - eg when everyone sits down to watch TV in the evening. This includes hydroelectric plants, as well as more "esoteric" types such as pump-storage power plants, AND things like wind and solar power.
So, as I was saying, it doesn't matter how many wind farms you build, you really can't use them for your base-load generating capacity. Only something like nuclear stations can replace coal power stations.
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