The control of high-speed variable-reluctance generators in electric power systems

The control of a direct-current electric power system that is sourced by a variable-reluctance generator (VRG) is studied. The power system includes the generator and its switching inverter, a filtering capacitor, a distribution network, and an electrical load. The network comprises a series resistor and inductor, while the load comprises a parallel resistor, capacitor, and power sink. The voltage at the load is regulated by adjusting the rotor angles at which the inverter switches. A method by which a load-voltage controller can be successfully designed for a power system sourced by a VRG is presented. The method employs averaging, global and local linearization, and model order reduction to facilitate the design. With the help of these techniques, a state full-state feedback controller with integral error action is designed. It appears that the controller works quite well. Transients caused by load changes clear quickly without significant overshoot or undershoot; there is no steady-state voltage regulation error: and the load voltage ripple is quite small. Preliminary experimental evidence confirms these expectations