South Australia blackout: renewables don’t cope with rapid change report finds


By Paul Homewood

h/t Joe Public


From The Australian:

A new report by a national electricity regulator has found that, as occurred during September’s statewide blackout in South Australia, renewable power sources cannot cope with rapid or large changes in frequency, leading ultimately to a “black system”.

The Australian Energy Market Commission today released its interim report on its review of power system security in the national electricity market.

The report found the nation’s power system is secure when voltage and frequency are maintained within defined limits, which is achieved by instantaneously balancing electricity supply against demand.

Large deviations or rapid changes in frequency can cause the disconnection of generation, potentially leading to cascading failures and ultimately a “black system”, the report warned.

Spinning generators, motors and other devices synchronised to the frequency of the electricity system have naturally provided the inertia necessary to allow the system to cope…

View original post 928 more words


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