Lyapunov-based control for three-phase PWM AC/DC voltage-source converters

TitleLyapunov-based control for three-phase PWM AC/DC voltage-source converters
Publication TypeMiscellaneous
Year of Publication1998
AuthorsKomurcugil H, Kukrer O
ISBN Number0885-8993 VO - 13
KeywordsAC-DC power convertors, Analog-digital conversion, Capacitance, circuit parameters, Circuit simulation, Circuit stability, closed loop systems, closed-loop system, Computational modeling, computer simulation, control laws, DC-output capacitance, large-signal disturbances, Lyapunov methods, Lyapunov's stability theory, Lyapunov-based control, Pulse circuits, Pulse width modulation, Pulse width modulation converters, PWM power convertors, rectifying mode, regenerating mode, simulation technique, Stability, state space, state-space methods, three-phase PWM AC/DC voltage-source converters, Transient response, Voltage control
AbstractThe three-phase pulsewidth modulation (PWM) AC/DC voltage-source converter with the control laws proposed so far is not only unstable against large-signal disturbances, but also has the problem that its stability depends on the circuit parameters such as the DC-output capacitance. This paper describes a new control law based on Lyapunov's stability theory. It is shown that the converter can be stabilized globally for handling large-signal disturbances. The resulting closed-loop system not only guarantees a sufficient stability region (independent of the circuit parameters) in the state space, but also exhibits good transient response both in the rectifying and regenerating modes. Also, a new simulation technique is introduced which increases the speed of the simulation process considerably. Computer simulations are presented to confirm the effectiveness of the proposed control strategy and the validity of the simulation technique. Experimental results are also presented to verify the theoretical and simulation studies