Wind and solar power generators in the UK may be asked to reduce their output this summer as the National Grid endeavours to ensure a balanced grid.

FT reports that the growth of both renewable technologies means there is likely to be too much generation over the summer period, and NG has to keep the national transmission system at a stable frequency within a narrow range around 50 hertz to ensure household appliances work properly.
Wind and solar power
In its latest “summer outlook” report, National Grid said peak demand this summer is likely to be the lowest on record, at 35.7GW. Minimum summer demand is expected to be 18.1GW, lower than 18.4GW last year.

In a statement National Grid said, “Based on current information we anticipate that during some weeks there will be more inflexible generation on the system than is needed to meet demand. In order to balance the system, it may be necessary, during these weeks, for us to instruct inflexible generators to reduce their output. Wind generation may need to be curtailed this summer during minimum demand periods to help us balance the system.”

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