<div class="gmail_quote"><br></div><div class="gmail_quote">On Thu, Mar 29, 2012 at 8:31 PM, Adrian Tymes <span dir="ltr"><<a href="mailto:atymes@gmail.com">atymes@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Even assuming that increase, and even assuming that an equal<br>
amount of fossil fuel energy production is taken offline to<br>
compensate, wouldn't a majority of Italy's energy production still<br>
come from fossil fuels?<br></blockquote><div><br></div><div>Probably yes, since fossil fuels have now a share of around 75% of total production, and they will continue to provide the bulk of it during the night and when the weather isn't that good.</div>
<div>PV overproduction during the day could be usefully stored on hydro pumped storage, in order to further reduce the fossil fuel load. But there is a conflict of interest where the owners of such hydro plants also own gas-peaking plants, which are increasingly sitting idle and can't be amortized.</div>
<div>Even so, the change is momentous and is happening with blinding speed: just two years ago, not many were convinced that PV had any significant role to play at all. In two years from now, roles may be reversed.</div><div>
<br></div><div>Ciao,<br></div><div>Alfio</div><div><br></div><div><br></div><div><br></div><div><br></div><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div><div class="h5"><br>
On Thu, Mar 29, 2012 at 10:13 AM, Alfio Puglisi <<a href="mailto:alfio.puglisi@gmail.com">alfio.puglisi@gmail.com</a>> wrote:<br>
> During the last few days, I have realized that something very interesting is<br>
> going to happen on electricity markets this summer: there is a<br>
> non-negligible chance that a major country is going to have so much<br>
> production from solar photovoltaics that it will have to *export*<br>
> a sizable fraction of it.<br>
><br>
> The facts: Italy has a population of about 60 million, and peak electricity<br>
> usage that hovers around 50 GW on working days, and 40 GW on weekends.<br>
><br>
> This February, mid-day PV production peaked at almost 10 GW. That's about<br>
> 330% more than last February. Generous feed-in tariffs have fueled this<br>
> crazy growth. Given the explosive results, tariffs are being slashed every<br>
> few months, but PV installations show no signs of slowing down.<br>
><br>
> The graph of hour-by-hour prices in the electricity market<br>
> is mightily interesting: <a href="http://www.mercatoelettrico.org/It/" target="_blank">http://www.mercatoelettrico.org/It/</a> (top left<br>
> graph, red line is instantaneous price): two peaks at 9am and 8pm, while in<br>
> the rest of the day the market is flooded with PV-generated energy, which<br>
> keeps prices down. A few years ago the shape was totally different - a<br>
> high plateau during the entire day.<br>
><br>
> in 2011, PV generation in August was 5x the one in February. If the trend<br>
> holds, Italy risks to have too much electricity for its internal market at<br>
> certain times (starting from noon at weekends, and working down from there),<br>
> and will have to export. That's quite a change, since Italy has been a<br>
> chronic energy importer for entire *decades*. Countless electrons inside the<br>
> power lines coming in from France, Switzerland and Slovenia will have to<br>
> suddenly move in a direction they have never witnessed before.<br>
><br>
> Traditional energy giants are lobbying like hell the government to regulate<br>
> the market back into something more manageable (for them), but I think it's<br>
> too late. Gas-burning plants, designed to spin up during demand spikes,<br>
> are already being priced out.<br>
><br>
> Is there anyone out there closely following the same developments, or it's<br>
> just me having unhealthy interests? :-)<br>
><br>
> Ciao,<br>
> Alfio<br>
><br>
><br>
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