S
Sylvia Else
Guest
On 28/03/2010 5:55 PM, Adam Anderson wrote:
frequency control services, which are generators whose power output is
adjusted on the fly to maintain the frequency - essentially they're
adjusting to match second by second variations in demand. Running
generators that way is more expensive, so owners have to be paid extra
to do it, and AEMO only contracts for the maximum amount of variation it
expects to see.
Sylvia.
That's for ordinary dispatched supply, but in addition there areOn 28/03/2010 5:04 PM, Sylvia Else wrote:
On 28/03/2010 4:16 PM, Bruce Varley wrote:
"Sylvia Else"<sylvia@not.at.this.address> wrote in message
news:4badf098$0$1490$c3e8da3@news.astraweb.com...
http://www.brisbanetimes.com.au/environment/earth-hour/earth-hour-headache-for-power-suppliers-20100326-r37h.html
It would be really funny if an Earth Hour triggered cascading blackouts
(preferably not on the eastern seabord of Australia, given that that's
where I live).
Sylvia.
Nuh. Nothing that a good operator couldn't handle. He'd have to put his
coffee and sports mag down for a bit.
That view seems well supported by the graph I posted. The media article
referred to dispatching increased frequency control sevices, and running
the voltage at the lower end of its permitted range. I can only assume
the AEMO were preparing for a much larger popular support for Earth Hour
than it actually got. Maybe in future years they'll just ignore it.
Sylvia.
Coal fired turbines take about 72 hours to ramp up / down. They normally
run at an average = to market demand, during peak times the operators of
the power stations (hello Macquarie Generation) wait for the price of
power on the national grid to rise a little bit then they switch on the
Gas powered turbines and make a half a mil and then switch em back off
as the peak subsides.
frequency control services, which are generators whose power output is
adjusted on the fly to maintain the frequency - essentially they're
adjusting to match second by second variations in demand. Running
generators that way is more expensive, so owners have to be paid extra
to do it, and AEMO only contracts for the maximum amount of variation it
expects to see.
Sylvia.