The British love their tea. They also love watching TV. When these
two factors come together an interesting and unique phenomena known as the TV
Pickup occurs. During commercial breaks, half times, at the end of shows,
and between shows millions of households put the kettle on to heat water for
their tea. This draws vast reserves of power
(multiple giga-watts worth) in less than five minutes, resulting in a possible
overload of the power grid. The
challenge is to effectively forecast the massive surge in energy usage caused
by the TV Pickup.
In some ways forecasting for this massive increase in demand is
simple. The timing, at least, is fairly
easy to follow. The two examples used,
EastEnders (a B.B.C. sitcom) and large soccer matches, both have predictable
stoppage points. The end of EastEnders
is set ahead of time, although as seen in the video they sometimes run slightly
over which requires quick adjustments to the timing of the TV Pickup, while
soccer matches have half-time at 45 minutes and the game finishes at 90
minutes. Timing the TV Pickups for
soccer is a little more complicated due to the addition of stoppage time (games
on-average run 3 minutes over, though stoppage time can be as short as 30
seconds and as long as 8 minutes) as well as extra time/shootouts of the game
is tied at the end and being played in a tournament setting.
With a bit of experience for soccer it is easy to tell how long
stoppage time will be or if the game is headed into extra time, but the biggest
challenge comes in forecasting viewing demand and the number of kettles that
will be put on. Most episodes of
EastEnders average 7 million viewers, with some getting as high as 9
million. However in 1986 when Den Watts
served Angie her divorce papers (disclaimer: I have no idea who these
characters are or what their story is) the show attracted 30 million
viewers. The challenge then becomes predicting the
popularity of specific episodes, which means following the plot-line and
attempting to forecast when an upcoming episode will be more popular.
For soccer it can be even harder to tell which matches will be the
most popular. To date the England vs
West Germany semi-final match in 1990 was the most popular, with the equivalent
of 1.12 million kettles being put on at the end of the game (the end of extra
time to be specific). The second most
popular was the quarter-final matchup of England v Brazil in 2002, when the
equivalent of 1.03 million kettles were put on at half-time. To further complicate things, the equivalent
of 840,000 kettles were put on at half-time of the extra time in the 1998 round
of 16 matchup between England and Nigeria.
Half-time, end of extra-time, half-time of extra time, it can be
difficult to predict at which breakpoint people will want their cuppa. Predicting overall viewership can also be
difficult, as it is hard to tell which games will be the most popular. To do this they have begun surveying soccer
fans to determine which games they think will be most popular and which games
they will watch.
Ultimately the task of forecasting TV Pickups is a difficult one,
where power grid operators must rely on a blend of historical data and
intuition to accurately project power usage from kettles and respond
accordingly.
What are some additional methods the utility companies could use
to predict and forecast which TV programs will be the most popular?
While the TV Pickup is unique to Britain (due to their love of tea
and kettles), are there any similar phenomena that occur in the United States?
http://www.telegraph.co.uk/sport/football/world-cup/10862802/Will-World-Cup-2014-cause-the-lights-to-go-out.html
http://www.bbc.co.uk/britainfromabove/stories/people/teatimebritain.shtml
http://en.wikipedia.org/wiki/EastEnders
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