Wind Turbine Generators—They Just Keep Getting Bigger

الملخص

The wind turbine industry is evolving. One notable trend is to design, develop, and install ever-larger wind turbine generators. Is bigger really better? When using machines of larger capacities their efficiencies increase. Fewer are required to generate the electricity needed. This article discusses the shift in the wind power industry to producing larger capacity machines for use in the development of both land-based and offshore wind farms. This article further considers the reasons why manufacturers are racing to build larger wind turbine generators, discusses development limitations, and identifies the electrical power capacities of the largest ones that have been installed. While there are no theoretical limits, the size of wind turbine generators is limited by technical, economic, and developmental challenges. The basic mechanics of wind turbines are detailed. This article also considers the importance of making on-site operational performance assessments after prototypes have been placed into operation. The author concludes that there are opportunities for efficiency improvements and growth in the wind power industry that will drive future innovation and create the ability to produce machines with larger capacities.

مقدمة

Though economic constraints hindering the development of wind farms must be overcome, wind power is a renewable energy resource which offers many important benefits. Wind power provides mechanical capabilities and generates clean electricity. Unlike other forms of electrical generation, it coexists with agricultural and other land uses. Wind power is becoming more economically competitive when compared to fossil fuel-fired means of electrical generation. It provides needed revenues, creates local employment, and increases the property tax base in rural areas. Perhaps more importantly, in some regions of the world locally available wind resources offer the lowest cost of producing electricity. The expansion of electrical generation using wind power is viewed by some countries as a strategic solution to help them meet their environmental and sustainability objectives. This is because harvesting wind power does not produce air pollution nor emit greenhouse gas (GHG) emissions.

 Wind power requires optimum site selection and is an intermittent renewable energy resource. Overcoming the problem of variable electrical generation when base load power is often required remains a problem for the industry. This issue can be resolved by interconnecting to a host electric grid, using energy storage to smooth the power produced, or by developing microgrids.

 Despite the inherent issues with using wind power for electrical generation, the industry is rapidly increasing generation capabilities and capacity. It was only about 20 years ago when the standard wind turbine generators (WTGs) used for commercial windfarms were rated at 1.5 to 2.0 MW. Today’s super-sized horizontal axis wind turbines (HAWTs) are taller than some of the skyscrapers found in nearby cities. Bigger is not necessarily better; building larger turbines entails resolving numerous, logistical, engineering, and manufacturing challenges. While land-based wind farms have different requirements depending on the site, offshore wind power developments often deploy the newest, tallest, and most efficient turbines [1].

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This article was originally published in the مجلة الطاقة البديلة والجيل الموزع (AEDG Vol. 7, Iss. 3, 2025) by Stephen Roosa.

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