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Large Wind Turbine

Application Considerations

  • Since wind resource varies from on location to the other, and due to the complex terrain of Hong Kong wind resource characteristics may vary greatly even for locations in close proximity to each other, therefore for any serious wind power project, on-site short-term wind measurement, long-term wind resource prediction, wind flow modelling and energy yield prediction will need to be conducted (refer to Large Wind Turbines - Resource Potential section for details).

  • If more than one wind turbine is to be installed, each turbine will become an "obstacle" to the other turbines when the wind blows in certain direction, causing the "wake effect". Energy yield prediction of a whole wind farm taking into account the wake effect can be done using computer software.

  • Choose the right turbine based on the local wind characteristics. Wind resource in Hong Kong is moderate, use of variable speed design will provide better energy yield as compared to fixed speed design.

  • As Hong Kong is subject to typhoons, use the strongest wind turbine available in the market. For wind turbines certified to standard IEC classes, the IEC Class 1 machines can withstand the highest extreme loads (designed to withstand 70m/s 3-sec gust). Also, turbulence intensity of the site will also affect the choice of wind turbine.

  • If a wind turbine is to be developed by an organization other than an electric utility company, the utility company should be consulted concerning the grid connection requirements.

  • Take note of the requirements on the access road (width, turning radius) to the site, because of the need to transport the long turbine blades and heavy parts to the site, and also to transport the hoisting crane to the site.

  • Take note of overhead line or electric cable routing requirements, from the wind turbine site to the nearest grid connection point.

  • Take note of Aircraft Height Restriction requirements.

  • Take note of Environmental Impact Assessment requirements.

  • Take note of land acquisition requirements.

  • Take note of aviation marking and warning light requirements.

  • Take note of radars and other civil aviation and marine navigation equipment.

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