530 allows turbine controller 500 and pitch control system 520 to control the pitch of the blades during a low voltage event for example pitch control system 520 can feather the blades to slow or stop rotation of the rotor shaft ups 530 can also allow pitch control system 520 to operate during a transient voltage event until full power is restored in one embodiment ups 530 also provides power to one or more sensors during a low voltage event for example ups 530 can provide power to rotor speed sensors so that turbine controller 500 can monitor the speed of the rotor during a low power event turbine controller 500 can use the data from the sensor to determine whether an overspeed condition will occur and respond appropriately in one embodiment turbine controller 500 includes control circuitry to shut off power to non critical systems in the wind turbine generator in response to a low voltage event the loads can include for example the yaw system and other loads that could cause fuses to open and or circuit breakers to switch typically these loads contain motors that draw high current during low voltage events in order to maintain performance other non critical loads for example heaters and lights are more resistant to damage as the result of a low voltage event and can be left connected to lvdp 540 ups 530 also provides power to the converter controller not illustrated in fig5 to allow the converter controller to guard against excessive currents in the inverters as described above with respect to fig4 in one embodiment the converter controller is powered by capacitors that store energy that is used during a low.