Poul-Henning Kamp wrote: > In message <[EMAIL PROTECTED]>, "Bill Hawkins" writes: > > >> Think of the incredible amount of energy stored in many >> rotating generators linked by the synchronous network. >> > > This is actually far less than you seem to think. > > >> If the load suddenly increased 10% [...] >> > > Then all generators would trip and disconnect from the grid. No > reasonably sized turbine driven generator survives a 10% load jump > without exensive repairs. > > Your explanation was true about 30 years ago, not so any more. > > After deregulation, electrical grids run very close to the > edge because nobody makes money on the reserve capacity and > therefore everybody only produces exactly what they are > legally required to. > > The main reason for all the research into UTC locked grids > is that it would prevent produces from "cheating at the scale". > > Whilst it may be reasonable to run close to the edge in large grids where no one generator provides a large proportion of the power, it is not so for smaller grids with a few generators providing a large proportion of the power. In the local (NZ) market generators are paid to supply spinning reserve capacity. Since we only have 2 separate AC distribution systems connected by a bidirectional dc link and one operator coordinates the distribution from all the generators "cheating at the scale" isn't likely.
Bruce _______________________________________________ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts