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Germany’s renewables induced grid instability threatens industry
From der Spiegel:
Even a major millisecond in voltage fluctuation can cause damage at large industrial firms. Sudden fluctuations in Germany’s power grid are causing major damage to a number of industrial companies. While many of them have responded by getting their own power generators and regulators to help minimize the risks, they warn that companies might be forced to leave if the government doesn’t deal with the issues fast.
It was 3 a.m. on a Wednesday when the machines suddenly ground to a halt at Hydro Aluminium in Hamburg. The rolling mill’s highly sensitive monitor stopped production so abruptly that the aluminum belts snagged. They hit the machines and destroyed a piece of the mill. The reason: The voltage off the electricity grid weakened for just a millisecond.
Workers had to free half-finished aluminum rolls from the machines, and several hours passed before they could be restarted. The damage to the machines cost some €10,000 ($12,300).In the following three weeks, the voltage weakened at the Hamburg factory two more times, each time for a fraction of second. Since the machines were on a production break both times, there was no damage. Still, the company invested €150,000 to set up its own emergency power supply, using batteries, to protect itself from future damages.
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Source: http://tallbloke.wordpress.com/2014/02/02/germanys-renewables-induced-grid-instability-threatens-industry/
