+#+date: <2023-12-23 Sat 18:38>
+#+filetags: :analysis:visualisation:energy_transition:
+#+title: How the energy transition is replacing daytime electricity generation.
+
+#+BEGIN_PREVIEW
+In a process labelled the energy transition, traditional sources for
+electricity generation are being replaced by renewable energy sources
+like wind and solar. To the extent this happens 'behind the meter',
+i.e. where the user of the electricity is generating & consuming it on
+their own premises like with rooftop solar panels, it results in the
+metered demand on the electricity grid not being aware of the demand
+that is met by on-site generation. Given how prevalent solar panels
+have become on Western Australian roofs over the past 10 years, it
+might not come as a surprise this has resulted in the remaining demand
+on the grid to come down on very sunny days around noon. This
+reduction has been quite rapid for a couple of years, but seems to
+have slowed this year and last, as seen in the graph below.
+
+#+attr_html: :class img-fluid :alt Evolution of minimum demand on the Western Australian SWIS
+[[file:../assets/SWIS_minimum_demand_evolution.png]]
+
+
+#+END_PREVIEW
+
+To create the graph, I calculate the 14-day running minimum of the daytime
+demand on the grid, starting back in 2014. For each year, the minimum that was reached is
+shown, as is the year-on-year difference between them. Since 2016,
+these minima have always been achieved during the Australian springtime. The 2015
+minimum jumps out, as it happened during summer and it took another 2.5 years to equal it again - I imagine it is linked to an outage of an
+industrial consumer of electricity.
