The Anonymous Widower

Thoughts On Powering Electrification Islands

In The Concept Of Electrification Islands, I didn’t say anything about how electrification islands would be powered. Although, I did link to this post.

The Need For A Substantial Electrical Supply

Electrification can use a lot of electricity.

This was illustrated by the electrification of the Midland Main Line, where a high-capacity feed from the National Grid had to be provided at Market Harborough.

But then the Government cancelled electrification North of Kettering leaving a twelve mile gap to be filled. I wrote about the problem in MML Wires Could Reach Market Harborough. In the end the sensible decision was taken and the electrification will now reach to Market Harborough station.

So places like Cambridge, Darlington, Doncaster, Leeds Norwich and York. which are fully electrified and on a main route probably have enough electrical power to charge passing or terminating battery-electric trains on secondary routes.

In Thoughts On The Actual Battery Size In Class 756 Trains And Class 398 Tram-Trains, I quoted the reply to a Freedom of Information Request sent to Transport for Wales, which said.

A four-car Class 756 train will have a battery capacity of 600 kWh.

A Class 756 train is similar to a Greater Anglia Class 755 train, which in Battery Power Lined Up For ‘755s’, I estimated weighs about 135 tonnes when full of passengers.

Weights for the Hitachi trains are difficult to find with a figure of 41 tonnes per car given for a Class 801 train on Wikipedia. In Kinetic Energy Of A Five-Car Class 801 Train, I estimated a full weight of a five-car Class 801 train at 233.35 tonnes.

Based on the Stadler figure, I would estimate that every train passing an electrification island will need to pick up as much as somewhere between 600-1000 kWh.

An Electrification Island At Sleaford

In The Concept Of Electrification Islands, I proposed an electrification island at Sleaford station.

  • Sleaford is a market town of around 18,000 people.
  • I doubt the power in the town has much surplus capacity.
  • This station is served by four trains per hour (tph), one to each to Lincoln, Nottingham, Peterborough and Skegness.
  • So it looks like a feed of three to four MW will be needed to charge passing trains.

Can the electricity supply in a town like Sleaford provide that sort of power for perhaps eighteen hours a day?

The only ways to provide that sort of power is to build a new power station or provide energy storage capable of boosting the supply.

Could Highview Power Provide The Solution?

I have been following Highview Power and their CRYOBatteries for some time.

They have already built a 5 MW pilot plant in Manchester and are currently aiming to build a plant with 250 MWh of energy storage, that can supply up to 50 MW. The company and this plant is discussed in this article on The Chemical Engineer.

One of these CRYOBatteries, would surely be ideal to power an electrification island, like the one at Sleaford.

  • It could be scaled to the electricity needs of the town and the railway.
  • It would be charged using renewable or excess energy.
  • There is a lot of wind power in Lincolnshire and just off the coast, which needs energy storage.
  • Similar systems could also be installed at other electrification islands at Cleethorpes, Lincoln, Skegness and other places, where the grid needs strengthening.

I have used Highview Power in this example, but there are other systems, that would probably boost the electricity just as well.

April 14, 2020 - Posted by | Energy Storage, Transport, World | , , , , ,

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