Here is the daily CAISO report. http://www.caiso.com/PublishedDocuments/WindSolarCurtailmentReport.pdf
It shows that the vast majority of curtailment events is due to local system congestion, and not because of demand. I expect that remotely-positioned MW-scale solar farms are much more susceptible to congestion issues than rooftop solar. I'm also not sure that rooftop-scale solar supports curtailment. On-site production allows for on-site self consumption, without tieing up a capacity on the local/regional grid. On-site production with storage further increases the time period where a site can operate without depending on the local/regional grid. Energy storage at the production sites would improve the match between production supply and transmission capacity. Energy storage near customers would improve the match between distribution capacity and customer demand. On Wed, Sep 1, 2021, 12:41 Mark Abramowitz via EV <ev@lists.evdl.org> wrote: > Southern California commonly sends its excess to Arizona - sometimes we > have to pay them to take it. Every year we curtail lots of renewables. > CaISO tracks how much. > > - Mark > > Sent from my Fuel Cell powered iPhone > > > On Sep 1, 2021, at 10:15 AM, Jan Steinman via EV <ev@lists.evdl.org> > wrote: > > > > > >> > >> From: "Peri Hartman" <pe...@kotatko.com <mailto:pe...@kotatko.com>> > >> > >> If, for example, southern cali has excess > >> PV generation, it will need to ship that energy somewhere pretty far > >> away, say oregon or washington. That would require a pretty substantial > >> transmission line. I don't think the existing lines are sufficient. > > > > The Pacific Intertie is a 600,000 volt DC line that stretches from > Washingon to SoCal. I think it can handle enough power for a minor city. > > > > Jan > > > > -------------- next part -------------- > > An HTML attachment was scrubbed... > > URL: < > http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20210901/4bbebd8d/attachment.html > > > > _______________________________________________ > > Address messages to ev@lists.evdl.org > > No other addresses in TO and CC fields > > UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub > > ARCHIVE: http://www.evdl.org/archive/ > > LIST INFO: http://lists.evdl.org/listinfo.cgi/ev-evdl.org > > > > _______________________________________________ > Address messages to ev@lists.evdl.org > No other addresses in TO and CC fields > UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub > ARCHIVE: http://www.evdl.org/archive/ > LIST INFO: http://lists.evdl.org/listinfo.cgi/ev-evdl.org > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20210901/107361e8/attachment.html> _______________________________________________ Address messages to ev@lists.evdl.org No other addresses in TO and CC fields UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub ARCHIVE: http://www.evdl.org/archive/ LIST INFO: http://lists.evdl.org/listinfo.cgi/ev-evdl.org
