In contrast, when the wind speed V is lower than the cut in wind speed Vcut — in , {HEAD ~ the wind turbine generator} 1 switches {TAIL ~ the operation} to the idling mode  
switches
In contrast , when the wind speed V is lower than the cut in wind speed Vcut — in , { HEAD ~ the wind turbine generator } 1 switches { TAIL ~ the operation } to the idling mode
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH