When discussing wind power, critics often point to the same scenario: strong winds but stationary turbines, leading to electricity being ‘wasted’. Consequently, some conclude that this reflects a failure of the system, a misallocation of investment, or even that no further wind turbines should be built. This perspective, while seemingly intuitive, overlooks the fundamental logic of energy transition.
Let us first lay the facts on the table. The so-called curtailment of wind power does not mean that the electricity is unwanted; rather, it occurs when generation exceeds the immediate transmission capacity of the grid, necessitating a limitation on output. In the context of the UK in 2025, the curtailed wind power is expected to account for about 10% of the total potential wind generation for the year. In other words, nearly 90% of wind power will still be successfully delivered to the grid and utilized. To base the success or failure of energy policy on this transitional 10% is to miss the point entirely.
Understanding this issue is not difficult. Imagine the energy system as akin to constructing a building. Many large residential projects often begin with road construction, laying pipes, and pulling cables, even before the houses are built. In the short term, the roads may be empty and the lines underutilized, but no one would accuse this of being wasteful. Without these preparatory works, the houses could not possibly come into existence.
The relationship between the grid and wind power is similar. Wind turbines can be constructed quickly, while grid upgrades progress more slowly; thus, the two cannot be perfectly synchronized in timing. As the penetration of renewable energy begins to rise, transmission bottlenecks will inevitably emerge first. This is not an error but rather a structural friction that arises once the transition reaches a certain scale.
More importantly, wind power curtailment is a transitional issue. The limitations seen today along the North Sea coast or in certain areas of Scotland are not the norm for the system; they are highly concentrated in specific locations and times. With the strengthening of transmission lines, enhanced inter-regional transport capacity, and the gradual maturation of energy storage and demand management, these bottlenecks will be systematically resolved. Looking back a decade from now, today’s curtailment will merely be an inconvenience during a construction phase, not a long-term loss.
Some have thus argued: since curtailment occurs, we should not build more wind turbines. This reasoning completely reverses the causal relationship. Without a sufficient amount of wind power, there is no economic value in upgrading the grid. Investments in the grid often run into billions of pounds and cannot occur in a vacuum; they require clear and sustained demand signals. If the scale of wind power is insufficient, grid expansion will only become an idle asset, yielding no returns and making it difficult to achieve political and social consensus.
The true logic should be: wind power must come first, making grid upgrades worthwhile. When both wind power and the grid are gradually perfected, cheap, stable, and zero-fuel-cost renewable energy will transition from being a ‘supplementary option’ to the norm of the system. To demand zero curtailment before the grid is adequately established is, in itself, an unrealistic expectation.
From a broader perspective, the benefits brought by wind power have long surpassed the approximately 10% of curtailed output. It lowers overall generation costs, reduces reliance on fossil fuels, and provides a clear and credible investment direction for future grid upgrades. Focusing solely on curtailment while ignoring the nearly 90% of stable power supply is neither rational nor honest.
The real waste is not the temporarily unused wind, but rather the fear and misunderstanding that halt the progress that should continue.
