On Wed, 27 Oct 2010 17:35:41 -0700 (PDT), Andy Dingley wrote:

On 27 Oct, 11:54, "Man at B&Q" wrote:

Lots of teasing shots of grid frequency display but no detail of what
the varying frequency means or how and why it is controlled.

"Droop Speed Control" is your search term

And how many Viagra ads. ...?

Yes, the sequence showing the changing frequency and bringing supply on
stream to correct it didn't explain the significance.
Back in the 70s I had a boss who'd worked on a pumped storage scheme
installing control gear and he told me some of the aspects of this. He also
explained what would happen if a genny was put on line when only a small
amount out of phase - sounded 'interesting'.
--
Peter.
The gods will stay away
whilst religions hold sway