Continuing frequency deviation in the Continental European Power System

Re:Continuing frequency deviation in the Continental Europea... by kqr on Thursday March 08, 2018 @01:30AM (#16542731)

Imagine all power lines of a large part or entire country suddenly dropping away. The network outside of that country would suddenly experience a large decrease in load and its frequency would go up, while inside the country the load would have a large increse, reducing the frequency in that country. If the change is so large that the frequency goes above 52.5Hz or below 47.5Hz, then the automatic circuit breakers trigger to prevent damage to the entire network (basically adjusting the load of the network). If it can't adjust enough, more circuit breakers will trip, causing larger outages.

If the problem is that the frequency is too high, i.e. power load is too low in that coubtry, why would tripping a break help? Wouldn't that very suddenly aggravate the problem and create even higher frequencies?

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Re:Continuing frequency deviation in the Continental Europea... by eigenvector on Friday March 09, 2018 @01:48AM (#16550176)

When frequency is dangerously high, overfrequency protection relays at generating stations will trip, bringing the system toward balance. When it is dangerously low, loads will be tripped by the under-frequency load shedding system, again bringing the system back toward balance.

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