During the early hours of the previous Friday, wind power in Denmark reached the equivalent of 140% of national electricity demand. Because demand was low at the time, Denmark consumed nearly all of its own needs and made the remaining amount available for export to countries in the region. The figure is striking, but it does not mean that the country covers 140% of its consumption all the time; rather, it reflects a moment when high wind speeds coincided with low demand.
Nevertheless, this moment reveals a practical question that goes beyond the record: What does the electricity grid do when renewable generation exceeds local demand? Exporting the surplus is one solution, but Denmark also plans to expand infrastructure that can convert offshore electricity into other uses, rather than treating it as temporary excess power.
Energy Islands in the North Sea and Baltic Sea
The Danish Energy Agency is working on a plan to establish two new energy islands in the North Sea and Baltic Sea. The two islands will serve as hubs for collecting offshore wind power and transmitting part of it directly to the networks of coastal areas, while allocating another part to maritime uses, including the production of green hydrogen.
According to the details provided in the article, the North Sea facility will manage offshore wind power with a capacity ranging between 3 and 4 gigawatts, with the possibility of increasing it in the future to 10 gigawatts. The Baltic Sea facility will add another 3 gigawatts. The Danish Energy Agency indicates that the two hubs could manage enough energy to meet the needs of approximately 5 million households.
The agency describes the two islands as “green power plants at sea” and connects them to the plan to phase out fossil fuel sources in Denmark and Europe. However, the source does not provide a timeline for completing the two projects, nor does it clarify details about their financing or the infrastructure required to connect them to regional grids.
What Changes in Practice?
The technical significance of Denmark’s experience is that expanding wind power does not depend solely on installing turbines. When generation fluctuates with the weather, regional interconnection networks, exports, storage, and converting electricity into hydrogen become complementary elements to generation capacity itself. In Denmark’s case, the design of the energy islands represents an attempt to integrate these elements into single offshore hubs.
However, reaching production levels that exceed local demand does not eliminate the problem of timing. The surplus appeared during a short period when electricity consumption was low, so this result alone cannot serve as evidence of wind power’s ability to provide a steady supply around the clock. The source also does not state how much energy was actually exported or how it was priced.
Comparison with the United States
The author turns to the United States, which has long coastlines on the Atlantic and Pacific Oceans, in addition to resources in the Gulf of Mexico. The article states that the Atlantic states, with the exception of Maine, generally have shallow coastal waters suitable for wind turbines fixed on monopile foundations. In Maine, researchers are developing a floating offshore wind platform for deep waters, while floating platforms developed in the United States have been used in projects abroad.
The article also points to plans by a consortium of parties in the Gulf region to repurpose idle offshore oil and gas facilities for renewable energy purposes, although wind speeds there are relatively less suitable. According to an estimate by the U.S. Department of Energy in 2021, the theoretical potential of offshore wind power in the United States exceeds 35,000 megawatts.
However, the author criticizes U.S. President Donald Trump’s decision to halt the issuance of new offshore wind permits after taking office, and states that a federal judge upheld the authority for the decision, while other judges rejected the use of emergency powers to halt projects that were already under way. The author also describes purchasing existing permits to prevent their development as an extraordinary step and one of questionable legality.
A certi.news Reading
The article does not present a new technical announcement so much as it presents an opinion argument about the difference between possessing a renewable resource and providing a system capable of absorbing it. The Danish case illustrates the value of regional interconnection and converting surplus power into applications such as hydrogen, while the comparison with the United States shows that policy and regulation may determine the speed of benefiting from offshore potential as much as technology does.
A large part of the text remains the author’s political interpretation, particularly regarding the motivations behind the U.S. administration’s position on offshore wind. The source also acknowledges that wave and tidal power still need years or decades, in addition to the development of supply chains and labor, before they can make a major contribution to the U.S. electricity mix. Therefore, the open question is not only how countries can produce more wind power, but also how they can build the grids, markets, and policies needed to use it when generation reaches its peak.