Patent ID: 7999405

Claim:
A system, comprising: an engine; a variable speed generator mechanically coupled to the engine, the engine being structured to drive the generator to provide variable AC power; an electrical energy storage device to selectively supply variable DC power; power control circuitry electrically coupled to the generator and the electrical energy storage device to provide regulated AC electricity; and a processor operatively coupled to the power control circuitry, the processor executing operating logic to provide control signals to the power control circuitry to: operate the generator at a first rotational speed to provide the AC electricity at a first level, increase the DC power provided from the electrical energy storage device to increase the AC electricity to a second level in response to an electrical load change, increase operating speed of the generator from the first rotational speed to a second rotational speed greater than the first rotational speed in response to the load change, decrease the DC power from the electrical energy storage device as the operating speed of the generator increases, limit a rate of change of the operating speed of the generator to a first speed change rate, the first speed change rate being less than a second speed change rate of the generator.