Total Pageviews

Tuesday, April 14, 2020

Two German case studies of renewable energy intermittency

An analysis 
of the shortage 
of fossil fuel
back up power 
capacity in Europe, 
based on German 
renewables:


SUMMARY:
Rapid deployment 
of renewables 
across Europe 
will increasingly see 
neighboring countries 
with correlated tight, 
or oversupplied, 
electricity needs.

Low speed winds 
in one nation are likely 
to affect neighbors.

All nations 
will have night 
at the same time.

There's no guarantee that 
one nation can "borrow"
electricity from a neighbor.

Current plans 
across Europe
include 
grossly inadequate 
back up power from 
conventional natural 
gas-fired generator.

The alternative of 
long duration electricity 
storage with batteries
would be extremely 
expensive. 

Hoping for much better 
batteries, at low prices, 
is just wishful thinking.



DETAILS:
Europe is leading 
the global push 
to decarbonize 
electricity production, 
primarily with 
wind & solar power.

More than 350GW 
of new wind and solar 
power is projected 
to come online across
Western Europe over 
the next 10 years. 

Large amounts of nuclear, 
coal & lignite power are 
due to close, at least 
40GW by 2023, and 
80GW by 2030.

Two case studies 
define the 
back up power
flexibility required 
to support renewable 
output swings in 2020, 
compared to 2030.  

It is asserted the 
large variations in 
sunshine and wind 
can be supported 
by electricity storage 
alone ( batteries ).

Wishful thinking !



For Germany alone:

Both studies 
are based on 
actual recently 
observed load, 
wind & solar data 
in Germany 
(the 2020 case).  









The second study scales up 
wind & solar output, based 
on the projected capacity 
growth required to meet 
the latest German 2030 
renewable policy targets. 








The top blue dashed line 
on the chart shows 
the level of installed 
‘flex" capacity in 2020
( just under 75GW ) 
to cover low wind & solar 
output days in 2020.

For 2030, the lighter 
blue shaded area 
at the bottom of the chart 
shows the incremental 
increase in wind & solar 
output in 2030. 

Despite the large increase 
in renewables capacity, 
there is only a relatively 
small increase in output 
on a low wind & solar day.

No amount of solar panels 
will produce power at night.

No amount of wind turbines 
will produce power with no wind.

A relatively high correlation 
of wind patterns across 
NW Europe means Germany’s 
neighboring markets 
may be in a similar position. 

There is a more than 30GW 
reduction in flexible 
backup ppwer capacity 
by 2030, creating a 500GWh 
energy shortage across the day.