Title :
Slip power recovery system stability
Author_Institution :
Emerson Motor Technol. Center, US Electrical Motors, St. Louis, MO, USA
Abstract :
A slip power recovery configuration provides an attractive alternative for variable speed drives and generating systems, due to its improved efficiency and low power converter rating. The core component is the doubly-excited machine. First, the authors present a stability analysis of the doubly-excited machine with open-loop voltage control and open-loop current control in the rotor circuit. Possibilities of open-loop control are analyzed. Second, they present a unified model of a high-performance slip power recovery system composed of a field-orientation controlled doubly-excited machine, power converters and a DC bus in the rotor circuit. The stability of this composite system represented by a model is studied. Of special interest is when the system functions as a variable-speed motor drive system or as a variable-speed constant-frequency generating system
Keywords :
asynchronous generators; control system analysis; electric current control; induction motor drives; machine control; power convertors; rotors; slip (asynchronous machines); stability; stators; variable speed drives; voltage control; DC bus; doubly-excited machine; efficiency; field-orientation control; open-loop current control; open-loop voltage control; power converter rating; rotor circuit; slip power recovery; stability analysis; variable speed drives; variable speed generating systems; Circuit stability; Current control; Interconnected systems; Open loop systems; Power generation; Power system modeling; Rotors; Stability analysis; Variable speed drives; Voltage control;
Journal_Title :
Industry Applications Magazine, IEEE
DOI :
10.1109/2943.384661
