Patent ID: 7880331

Claim:
A method, comprising: inverting DC electric power from a DC bus to provide AC electricity to one or more electrical loads; rectifying AC power output from a variable speed generator to provide a variable amount of electric power to the DC bus; measuring AC electric power provided to the one or more electrical loads; determining a power control reference that changes with variation of a difference between the AC electric power and capacity of the generator to provide power to the DC bus; adjusting DC electric power output from an electrical energy storage device to the DC bus in response to change in the power control reference; decreasing the DC electric power output of the storage device during the adjusting of the DC electric power output; increasing rotational speed of the generator during the adjusting of the DC electric power output from the storage device; and during the increasing of the rotational speed, limiting the rate of change of the rotational speed to no more than a predefined level that is less than an available maximum rate of change.