Single-Phase UPS Inverters with Space Vector PWM Extended Lyapunov-Function Based Control Strategy

Many UPS inverters used in todays technology are more efficient and reliable. In this paper we propose a UPS inverter controlled by space vector PWM technique with extended Lyapunov function control strategy which is formed by the energy storage in inductor and capacitor making the system to converge at an equilibrium point when the energy is continuously dissipated. Therefore, an extended Lyapunov function based control strategy is proposed, which eliminates the steady-state error without destroying the global stability of the closed-loop system. The steady state and dynamic performance of the proposed control strategy has been tested by simulations in MATLAB software with complete results and discussion.