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Jim Lazar's avatar

A very nice piece.

However, I disagree with one item: peak loads no longer drive grid investment. Utilities are installing storage to manage renewables, and have the option to install some of this storage near the customers, where it can deliver at peak hours without a need for grid investment.

The power sector is gradually becoming more like other industries. I'll use breakfast cereal as an example. We harvest all the corn (maize) in the autumn, but we eat Corn Flakes all year long (and concentrated in the morning hours as well). How do we do that? Storage is the answer. Vast silos of grain, huge warehouses near the breakfast cereal factories with rail carloads of Corn Flakes, regional warehouses with pallets of Corn Flakes, local supermarkets with cases of Corn Flakes, and my own pantry with several boxes (always bought on sale and with coupons). Of course I live in a big American home, with the space to do this; not everyone has quite the flexibility that I have.

Electricity will become similar if we are smart. Some storage will be built at the wind and solar farms, to smooth the flow onto the transmission system. Some will be built at transmission hubs, allowing for dynamic line ratings to dramatically increase allowed transmission loading, knowing that storage can pick up the load if a line or terminal equipment fails. But much should be built along the distribution system, to allow peak loads to be met without huge distribution capacity costs.

Batteries are now cheaper than distribution capacity. And those localized batteries can take power when it is cheap, and deliver it to customers when it is dear, earning their way to providing a cleaner power system.

Seattle City Light, the municipal utility serving Seattle, did a great piece of work on this in conjunction with EPRI. Their electrification study showed that to enable full electrification of heating, water heat, and transport, about one-third of their distribution circuits could handle the DAILY kilowatt-hour flow of electrification, but not the peak HOURLY load. For those circuits, Seattle determined that local storage and local demand response were alternatives to circuit capacity upgrades. One third of their circuits have plenty of capacity and do not need upgrades, and only one-third will need upgrades to meet the daily kilowatt-hour flow. https://www.epri.com/research/products/000000003002024906

Jim Lazar, Olympia, Washington (but written from Budapest)

Yes, there will be distribution capacity upgrades needed.

Alexa Sharples's avatar

Super summary — thank you.

On locational pricing, in Norway there was direct political fall-out in 2025 from locational pricing (just at the point the U.K. government was making its recent round of deliberations on the topic).

On the surface, Norway seems to have a lot of similar characteristics to GB: North-South supply-demand flows, non-EU member, continental inter-connectors playing an important role...

Are there any good pieces about how the UK could ameliorate the risks of something similar happening here, if LMP was to go ahead?

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