From NoTricksZone
By P Gosselin on 1. March 2024
When green energy ideology clashes with the laws of Engineering and physics…
Manfred Haferburg, power plant engineer, explains the problems of the German power grid in connection with the green energy transition at online site Achgut. The result is a very informative article. It is not primarily about blackouts due to a lack of power.
The author begins by explaining three important terms: The n-1 criterion, reactive power and instantaneous reserve.
“Let’s translate all the technical gobbledygook. The experts at the power transmission grid operators have been ‘preoccupied”‘ with the topic for a long time, but politicians have not understood it because ‘it is a very complex issue’. And then comes the kicker: the German transmission grid can no longer cope with the ‘n-1 error’ in every case. This means that if, in a tense situation, one of the large transmission lines suddenly fails due to a lightning strike, long-wave conductor vibrations in high winds and snow, sabotage or a transformer/high-voltage switch fault, ‘the electricity grid could become unbalanced’ – in other words, it could collapse in a domino effect. This could result in a partial grid failure or, in the worst case, a blackout. This time it’s not me saying this, but the team leader for system behavior in the strategic grid planning department at TransnetBW. I wrote this on this site years ago and was berated for it.”
“Here, too, an attempt at layman’s language: the large rotating generators of the power plants are ‘grid-forming’ machines; due to their large mass, they keep the frequency of 50 Hz constant in the range of seconds. For our colleagues at the Feferal Ministry of Economics and Federal Grid Agency, inertia is a physical property that ensures that power fluctuations are cushioned in a range in which the time for human intervention is too short. Wind turbines have only small masses and solar panels have no rotating parts at all, they are ‘grid-following’ with their inverters; this means that they are connected to the grid of the ‘grid-forming machines’ and do not have a stabilizing effect. Incidentally, gas-fired power plants tend to be ‘grid-following machines’. The large power plant generators have also been responsible for maintaining the voltage in the grid through reactive power control.”
At the end of the article, Haferburg comes to the conclusion that we will continue to see coal-fired power plants in operation for a very long time.
Read the full article on Achgut.
(Note: Today’s modern translation tools do a pretty good job at translating the text into English)
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