<
https://reneweconomy.com.au/wind-and-solar-supply-two-thirds-of-south-australia-grid-in-week-it-was-cut-off-from-nem/>
"The South Australia grid has been reconnected – or re-synchronised – with the
country’s main grid after a week of “isolation”, during which time wind and
solar still managed to deliver nearly two thirds of its electricity needs.
The Australian Energy Market Operator says South Australia was re-synchronised
with the National Electricity Market at 1803 (AEST) on Saturday after the main
275kV line near Tailem Bend was returned to service.
That occurred a week and a couple of hours after wild storms blew down a
transmission tower and caused multiple circuits to trip, and causing the state
to be “islanded” from the main grid.
The loss of synchronisation with the rest of the NEM meant that the South
Australia grid was effectively “isolated” for just over a week – although it
has a smaller high voltage connection through MurrayLink – forcing AEMO to
introduce emergency measures to maintain grid stability.
The main focus of these measures was to reduce the risk of any further
disturbances cascading through the state’s huge resource of rooftop solar PV
installation, so it took action to switch off as many of these rooftop solar
installations as it could in the middle of the day.
In the end, it could only impact just under half of them – most are on old
style legacy inverters that can’t be remotely controlled – but it appears this
and other measures, such as switching off small solar farms and encouraging big
energy users to increase load, allowed the situation to be managed.
What is remarkable is that despite the heavy curtailment of rooftop solar,
preliminary data shows the state still enjoyed a share of renewables of around
65-66 per cent, pretty much in line with the average over the last year. It is
the highest ongoing share of wind and solar of any grid of this size in the
world."
Via
Future Crunch issue 192:
https://futurecrunch.com/
Cheers,
*** Xanni ***
--
mailto:xanni@xanadu.net Andrew Pam
http://xanadu.com.au/ Chief Scientist, Xanadu
https://glasswings.com.au/ Partner, Glass Wings
https://sericyb.com.au/ Manager, Serious Cybernetics
