Patent ID: 7715950

Claim:
A controller for controlling a non-inverter based distributed energy resource, the controller comprising circuitry to: calculate a maximum frequency change for a generator based on a first comparison between a first power set point and a measured power from the generator; calculate a minimum frequency change for the generator based on a second comparison between a second power set point and the measured power from the generator; calculate an operating frequency for the generator based on a third comparison between a power set point and a measured power flow; calculate a requested shaft speed for a prime mover by combining the calculated maximum frequency change, the calculated minimum frequency change, and the calculated operating frequency; calculate a shaft speed adjustment for the prime mover based on a fourth comparison between the calculated requested shaft speed and a measured shaft speed of the prime mover; and calculate a fuel command for the prime mover based on the calculated shaft speed adjustment to adjust a rotation rate of a shaft of the prime mover thereby controlling a frequency of an output power of the generator.