Electricity - where is it from?

Exfarmer

Member
Location
Bury St Edmunds
and when its not used where does it go to?:unsure:
Essentially the power in the system drops as consumption increases and vice versa.so if generation is too much for the load the voltage rises and hopefully the grid orders producers to cut back.
Solar in particular has tested the system to the limits as it can vary so quickly, the grid was built around the old coal fired generators feeding large scale industrial consumers, with surges caused by such issues as a football match ending on a sunday afternoon , which was entirely predictable.
However there are other factors in play, much equipment , particulalry heaters can operate perfectly well if the voltage drops to a degree , except the power is lower, lights not so bright, the kettle does not boil so fast etc. So while power is dropping the NG has time to get more power on line, in fact they have something like a 16% margin.
This does not work so well in the local network , when solar input can vary by 25% in a couple of seconds
 

Bury the Trash

Member
Mixed Farmer
Essentially the power in the system drops as consumption increases and vice versa.so if generation is too much for the load the voltage rises and hopefully the grid orders producers to cut back.
Solar in particular has tested the system to the limits as it can vary so quickly, the grid was built around the old coal fired generators feeding large scale industrial consumers, with surges caused by such issues as a football match ending on a sunday afternoon , which was entirely predictable.
However there are other factors in play, much equipment , particulalry heaters can operate perfectly well if the voltage drops to a degree , except the power is lower, lights not so bright, the kettle does not boil so fast etc. So while power is dropping the NG has time to get more power on line, in fact they have something like a 16% margin.
This does not work so well in the local network , when solar input can vary by 25% in a couple of seconds
I meant where does it go to / what happens to it if say a panel or whatever generation source is churning it out, no battery not / shorting running to earth either etc just a dead end .... its not used .

As compared to water well yes pumped and air oil etc whereby pressure builds up iyswim

A physics question......
 

Exfarmer

Member
Location
Bury St Edmunds
I meant where does it go to / what happens to it if say a panel or whatever generation source is churning it out, no battery not / shorting running to earth either etc just a dead end .... its not used .

As compared to water well yes pumped and air oil etc whereby pressure builds up iyswim

A physics question......
As I said there is a balance in the system, if the voltage goes too high it will trip out the whole area and stop production.
All generators have a maximum voltage they can force back into the system, for small scale producers it should be set at 253 volts per phase. After this the inverters cut out. The same applies to the mass generators but of course they will be working on far higher voltage, but the limits will be pro rata.
 

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