System for controlling a turbine

A system for controlling a prime mover, comprising:

• a governor comprising a first VCPID (Variable Coefficient Proportional Integrative Derivative) control loop to regulate an input energy source to the prime mover, the first VCPID control loop being associated with a prime mover parameter and an external parameter,
• an external transducer comprising a sensor for sensing the external parameter,
• wherein the first VCPID control loop incorporates feedback from a second VCPID control loop to feed an integral term of the first VCPID control loop by steps comprising:
• (i) a previous derivative gain and a previous proportional gain are summed and subtracted from a selected output for the prime mover to yield a first result term,
• (ii) the first result term is input to an integral gain portion of the first VCPID control loop,
• wherein the first VCPID control loop includes a VCPID output that is fed to a first function,
• wherein the first function selects an input energy command based on the VCPID output, the input energy command being a command that requires a first amount of input energy to the first VCPID control loop, and
• wherein the governor provides the first amount of input energy to the prime mover to regulate input energy flow to the prime mover to maintain the external parameter sensed by the sensor at least one of (i) above a lower limit and (ii) below an upper limit.

A method of controlling an engine, comprising:

• operating a fuel governor comprising a first VCPID (Variable Coefficient Proportional Integrative Derivative) control loop operating in parallel with a second VCPID control loop to regulate fuel flow to the engine, each VCPID control loop of the first VCPID control loop and the second VCPID control loop being associated with a respective engine parameter and one or more external parameter;
• sensing, by an external transducer comprising a sensor, an external parameter of the one or more external parameter;
• incorporating, by the first VCPID control loop, feedback from the second VCPID control loop to feed an integral term of the first VCPID control loop by steps comprising:
• (i) a previous derivative gain and a previous proportional gain are summed and subtracted from a selected output for the engine to yield a first result term,
• (ii) the first result term is input to an integral gain portion of the first VCPID control loop;
• feeding, by the each VCPID control loop of the first VCPID control loop and the second VCPID control loop, a VCPID output that is fed to a first function;
• selecting, by the first function, a fuel command based on the VCPID output, the fuel command being a command that requires a first amount of fuel to the second VCPID control loop;
• and
• providing, by the fuel governor, the first amount of fuel to the engine to regulate the fuel flow to the engine to maintain the external parameter sensed by the sensor at least one of (i) above a lower limit and (ii) below an upper limit.