<P> Older style wind generators rotate at a constant speed , to match power line frequency , which allowed the use of less costly induction generators . Newer wind turbines often turn at whatever speed generates electricity most efficiently . The varying output frequency and voltage can be matched to the fixed values of the grid using multiple technologies such as doubly fed induction generators or full - effect converters where the variable frequency current produced is converted to DC and then back to AC . Although such alternatives require costly equipment and cause power loss , the turbine can capture a significantly larger fraction of the wind energy . In some cases , especially when turbines are sited offshore , the DC energy will be transmitted from the turbine to a central ( onshore ) inverter for connection to the grid . </P>
<P> Older style wind generators rotate at a constant speed , to match power line frequency , which allowed the use of less costly induction generators . Newer wind turbines often turn at whatever speed generates electricity most efficiently . The varying output frequency and voltage can be matched to the fixed values of the grid using multiple technologies such as doubly fed induction generators or full - effect converters where the variable frequency current produced is converted to DC and then back to AC . Although such alternatives require costly equipment and cause power loss , the turbine can capture a significantly larger fraction of the wind energy . In some cases , especially when turbines are sited offshore , the DC energy will be transmitted from the turbine to a central ( onshore ) inverter for connection to the grid . </P>
do wind turbines produce ac or dc power
do wind turbines produce ac or dc power
AC
AC