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An energy conversion generation system receives energy from a resource and converts the energy into electrical power for supply to a polyphase electric power grid operating at a system frequency. A prime mover driven by the resource energy and a converter, such as a power electronic converter, for p

An energy conversion generation system receives energy from a resource and converts the energy into electrical power for supply to a polyphase electric power grid operating at a system frequency. A prime mover driven by the resource energy and a converter, such as a power electronic converter, for produces excitation power from power received from a converter power source. A brushless doubly-fed generator has a rotor with rotor windings and a stator with stator windings comprising first and second polyphase stator systems. The rotor is driven by the prime mover. The first stator system supplies the electrical power to the grid, and the second stator system receives the excitation power from the converter. A sensor senses a parameter of the electrical power output supplied to the grid and produces a sensor signal corresponding to the sensed parameter. A controller controls the converter in response to the sensor signal. The controller establishes a reference signal, then processes the sensor signal with the reference signal to produce a controller signal. The converter produces the excitation power at an excitation frequency in response to the controller signal so as to increase the ratio of the electrical power output to the resource energy power input received by the prime mover. A related method of converting resource energy from a resource into electrical power for supply to the grid is also described. A frequency source generator, a generator system, a variable speed generation system controller and a related control method are each described.

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An energy conversion generation system for receiving resource energy from a resource and converting the resource energy into an electrical power output for supply to a polyphase electric power grid operating a&: a system frequency, the energy conversion generation system comprising: a prime mover dr

An energy conversion generation system for receiving resource energy from a resource and converting the resource energy into an electrical power output for supply to a polyphase electric power grid operating a&: a system frequency, the energy conversion generation system comprising: a prime mover driven by the resource energy; converter means for producing excitation power from power received from a converter power source; a brushless doubly-fed generator having a rotor with rotor windings and a stator with stator windings comprising first and second polyphase stator systems, the rotor coupled to and driven by the prime mover, the first stator system being electrically connected to the electric power grid for supplying the electrical power output, and the second stator system being electrically connected to the converter means for receiving the excitation power; sensor means for sensing a parameter of the electrical power output supplied to the grid and for producing a sensor signal that corresponds to the sensed parameter; and controller means for controlling the converter means in response to the sensor signal, the controller means including reference means for establishing a reference signal and processing means for processing the sensor signal and the reference signal to produce a controller signal; the converter means being constructed to produce the excitation power at an excitation frequency in response to the controller signal so as to increase the ratio of the electrical power output to the resource energy power input received by the prime mover.