What is actually happening in the electricity grid when demand is greater than supply?

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I was thinking on the drive home for work that the ever increasing number of electric vehicles will likely mean an increasing demand on the energy infrastructure’s of countries.

But what is actually happening in the electricity grid if supply can’t meet demand? Is it simply the devices furthest away from the generation of power won’t receive current?

Whilst this is ELI5, I also wouldn’t mind a slightly more technical answer. Thanks!

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8 Answers

Anonymous 0 Comments

So, my understanding is a that a overdrawn electrical grid will run “slow”, in the sense it will drop from its normal frequency of 60hz to a slower frequency. the effects of this are…complex, but generally its A Bad Thing.

however, widespread electrical car charging is NOT that likely to cause this, mainly because it causes relatively stable, predictable loads that can be planned around, and power companies can manage power generation around it much easier than, say, several million households in England all getting up from watching TV during an ad break and putting their kettles on at *the same time* (which is a real thing they have to work around)

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