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Appendix I
Definition of 50m/s survival wind speed of HYE wind turbine
HYE wind turbine is strict in accordance with following standards:
GB/T 10760.1 Generator of Off-grid Wind Turbine Generator System Part 1:Technology condition
GB/T 13981-2009 Design General Requirements for Small Wind Turbine Generator System
GB 17646 Safety of Small Wind Turbine Generator System
GB/T 19068.1 Off-grid Wind turbine Generator Systems Part 1:Technology condition
JB/T 10399-2004 Rotor Blades for Off-grid Wind Turbine Generator System
JB/T 10402.1-2004 Yaw System of Wind turbine Generator Systems Part 1:Technology condition
JB/T 10403-2004 Tower for Off-grid Wind Turbine Generator System
JB/T 10405
―
2004 Technical Condition for Foundation and Linkage of Off-grid Wind Turbine Generator System
NY/T 1137-2006 Installation Specification of Small Wind Turbine Generator System
Our HYE wind turbine belongs to Class III in accordance with wind turbine international grade, please refer to following chart,
In order to be compatible with extreme load of international safety standard, while calculation of the load, the
and all of wind speed which is
calculated by
should be reduced by 7%.
As we all know, the huge wind, storm or hurricane usually does not last for a long time, assuming a huge wind occurred once in 50 years, the average
maximum wind speed within 5 seconds at hub height is represented by
, it is calculated by
multiply coefficient 1.4, that is =1.4
From above explanation, the survival wind speed of Class III wind turbine is:
=1.4 -1.4 *7%=1.4*37.5-1.4*37.5*7%=52.5-3.68=48.82m/s (
＜
50m/s)
