Lead in times and TV guides

So how exactly is the Grid put under such pressure, and how are these surges predicted? A sudden increase in demand, unmatched by an increase in supply, causes a drop in the mains frequency across the Grid. So the National Grid Energy Balancing Team, who are responsible for ensuring an adequate supply of electricity, have to run a computer programme that compares the current day with corresponding periods over the past five years to predict the size of demand. They then notify power stations of a recommended ‘lead in time’, which would enable them to prepare for - and cover - the extra need for electricity.

Modelling via a computer algorithm isn’t enough to predict future surges. Grid employees themselves have to study TV schedules to anticipate demand. Big sporting events are easy to identify as potential risks, but in some cases it isn’t so straightforward. Operators often have to familiarise themselves with popular soap-opera storylines or upcoming TV dramas, as one might cause a sudden rise in usage. The dastardly deeds of Phil Mitchell can often have a profound impact on a Grid worker’s day-to-day.

The good news is that, according to the National Grid, changing viewing habits nationwide are bringing along some respite. The rise of on demand streaming services, such as Netflix and iPlayer, means that millions of people are much less likely to nip to the kitchen for a cup of tea at the same time. That said, the surges are still an issue for major events such as the World Cup. In fact, all of England’s knockout games at the last tournament ranked as some of the highest TV pickups in recent memory, so the Grid still needs to be equipped to serve the country during spikes in activity.

Still, the reduced urgency of watching television by means of ‘appointment’ gives the Grid a little breathing space. And with a bit more breathing space, our friends on the Grid have a bit more time to relax. Cup of tea, anyone?

The Shell Energy Blog

Our renewable mix, from the ground up

Balancing act: how the Grid manages demand

How to bleed your radiators

First Utility has changed