FAQ

  1. What are the major components of a standalone wind energy system?
  2. Are small wind turbines noisy?
  3. How can I connect a small wind turbine to the AC distribution system of a building or a site?
  4. Do I have to lower a small wind turbine when typhoon is approaching?
1) What are the major components of a standalone wind energy system?
Ans: A standalone wind energy system usually consists of a small wind turbine and its supporting structure (e.g. a pole fixed in position by guywires), a charge controller and a battery bank. If the loads demand AC supply, an inverter for converting DC to AC will be necessary.
   
2) Are small wind turbines noisy?
Ans: Small wind turbines usually have DC generators, and they need to rotate rather fast in order to produce sufficient output. This causes a bit of noise when the wind is strong. Depending on the design, some turbines are quieter than the others.
   
3) How can I connect a small wind turbine to the AC distribution system of a building or a site?
Ans: In Hong Kong, one has to make an application to the power company for permission to connect a small wind turbine to the grid, indirectly through the distribution system of the location. A grid-tie inverter, with specifications meeting the guidelines given in the Technical Guidelines on Grid Connection of Small Scale Renewable Energy Power Systems and the requirements of the power company, is needed for converting DC output of the small wind turbine into AC for grid connection.
   
4) Do I have to lower a small wind turbine when typhoon is approaching?
Ans: If a small wind turbine has a low survival wind speed, you may have to lower it when a typhoon is approaching. On the other hand, if the survival wind speed is high, and if the manufacturer suggests that there is no need to lower the turbine, then such kind of procedure will not be necessary.
   
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