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Large and Small Wind Turbines are Different

Large and Small Wind Turbines are DifferentWind turbines are generally divided into two broad categories based on their rated capacity and their intended applications. Small wind turbines are typically less than 50 kW in size, but can be as large as 250 kW and are designed for use in residential, agricultural, small commercial and some industrial applications. In all of these applications, the turbine(s) are providing energy for the end user to offset the use of grid power.

Large wind turbines have rated capacities ranging from 660 kW to 1,800 kW (1.8 MW) and are designed for use in electricity generating power plants. Large turbines are typically deployed in wind farms and are intended to provide wholesale bulk electricity production for delivery on the local transmission network

Small wind turbines can be grid-connected for residential or industrial electricity generation or they can be used in off-grid applications such as water pumping or battery charging. Small turbines are typically installed as a single unit or in small numbers. The smallest turbines (with power ratings less than 1 kW) are normally used to charge batteries for sailboats, cabins, and small homes. Turbines with power ratings between 1 kW to 20 kW are normally used for water pumping, small businesses, residential power, farm applications, remote communication stations, and government facilities.

They are often found as part of a hybrid system that can include photovoltaic cells, grid power connections, storage batteries, and possibly back-up diesel generator sets. Turbines rated at 50 to 250 kW are used in light commercial/industrial, larger farms, and village power applications.

Figure 3. Small Wind Turbine Height Comparisons
Figure 3. Small Wind Turbine Height Comparisons

Large wind turbines are most commonly deployed in large arrays of multiple turbines. Less common, but increasingly of interest to municipalities or electric cooperatives, large turbines are also installed in distributed generation applications that consist of a single or a few turbines connected directly to a distribution line. Many large wind turbine manufacturers are offering models in the 1 MW range.

Wind turbines as large as 1.8 MW are available for land-based applications in the U.S. For offshore environments, manufacturers are testing designs in the range of 3-5 MW.

Figure 4. Large Wind Turbine Height Comparisons
Figure 4. Large Wind Turbine Height Comparisons

Examples and information pertaining to both large and small wind turbines are included in this guide. Although there is some overlap, the majority of the technical issues, permitting requirements, and operating procedures are different for large and small wind turbine applications. Therefore, it is important to differentiate and address the large and small wind turbine applications separately rather than trying to address them with the same set of regulations or review processes.

Large-scale applications are likely to have more impact on a community.

RESOURCE: Wind Energy Development – A Guide for Local Authorities in New York

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Edvard Csanyi

Edvard - Electrical engineer, programmer and founder of EEP. Highly specialized for design of LV/MV switchgears and LV high power busbar trunking (<6300A) in power substations, commercial buildings and industry fascilities. Professional in AutoCAD programming. Present on

6 Comments


  1. Dr emad alkawkje
    Feb 13, 2017

    Dear sir

    We Elite company interested in diversifying energy sources and our headquarters in Damascus – Syria

    I want an economical solution to power outages 6 hours for the network

    Even run 5000 watts

    Dr Mohamad Emad Alkawkje


  2. hassan
    Apr 15, 2015

    how you compare the efficiency ratio of small wind turbine vs large wind turbine, considering the the operation wind velocity range and the power conversion efficiency?


  3. P.Mohanasundaram
    Jul 28, 2011

    Very valid information i read from EEP. Hence please add me an member of your board.

    Thanks & Best Regards,

    P.Mohanasundaram

    • Edvard
      Edvard
      Aug 12, 2011

      Thank you again! If you have any suggestion or remark feel free to post here!


  4. P.Mohanasundaram
    Jul 28, 2011

    Sir,
    Iam basically electrical Engineer having 34 years experience, worked in LV & MV Switchgers. Presently I am in Kingdom of Saudi Arabia in one of the Top 10 industry named as Alfanar Electrical Systems since from 2008.
    My Job responsibility is development of new product – named as bus bar trunking and LV & MV Bus duct.
    This is mt brief introduction of mine.
    Iam very happy to read information from EEP.

    Thanks & Best Regards,
    P.Mohanasundaram.

    • Edvard
      Edvard
      Aug 12, 2011

      Thank you sir! Glad you find it usefull!

      BR

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