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