May 11, 20224 yr The source for this is the EskomSePush app. What strikes me is that the per year curves are steeper in the summer months. Drier coal? Eskom willing to burn through diesel reserves so people stay warm in the winter? Note that this would exclude Eskom's "load reduction" which is just cutting supply to certain townships once or twice a day.
May 11, 20224 yr What is missing from that graph are the curves for planned and unplanned maintenance. Those maintenance curves may prove insightful for the years without load shedding. Another interesting figure to be plotted would be the amount of emergency generation used. E.g., running the peaking plants outside of peak demand times to make up for a lack of supply...
May 11, 20224 yr I'm busy justifiying a generator and solar expansion project at work. Found the Eskom se Push history online here https://docs.google.com/spreadsheets/d/1ZpX_twP8sFBOAU6t--Vvh1pWMYSvs60UXINuD5n-K08/edit#gid=863218371 Easy enough to calculate duration of each stint and GWh shed. The real situation is worse than the graph @Bobster posted - the graph shows hours only which should be mulplied by stage to get GWh shed. 2018 Full Year: 220 GWh 2019 Full Year: 1328 GWh shed 2020 Full Year: 1782 GWh shed 2021 Full Year: 2494 GWh shed 2022 YTD 10 May: 1238 GWh shed Edited May 11, 20224 yr by Scubadude
May 11, 20224 yr Source: Own analysis on Eskom se Push historical data Edited May 11, 20224 yr by Scubadude
May 11, 20224 yr And to answer your question, this gives some clues ... Eskom plans to have more units operating in winter to match increased demand. Problem is if the old ladies keep breaking down faster than you can fix them. Which is where we are now. Edited May 11, 20224 yr by Scubadude
May 11, 20224 yr More light reading here .... https://www.eskom.co.za/wp-content/uploads/2022/05/State-of-the-SystemBriefing11May2022.pdf
May 12, 20224 yr Author 17 hours ago, Scubadude said: And to answer your question, this gives some clues ... Eskom plans to have more units operating in winter to match increased demand. Problem is if the old ladies keep breaking down faster than you can fix them. Which is where we are now. Ja. There is more maintenance in summer and spring, so their margins are smaller.
May 12, 20224 yr Does not make sense that they dont allow us to sell back to them with our excess generation we make...
May 12, 20224 yr Author 54 minutes ago, Slaki said: Does not make sense that they dont allow us to sell back to them with our excess generation we make... Eskom have shed between 17:00 and 22:00 every night this week. That's when demand is highest. How much solar power are we producing then? If they have a way of storing excess power on the grid when the sun is shining, then reselling helps them. Or if they have big solar sites with batteries or some other form of storage. They need to be able to store solar energy and then deploy it later, as we do within our own homes.
May 12, 20224 yr 4 hours ago, Bobster said: Eskom have shed between 17:00 and 22:00 every night this week. That's when demand is highest. How much solar power are we producing then? @Bobster 100% agreed
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