Discrete-Time Model Following Control of Single Phase UPS with EDLC

Abstract

Electric Double Layer Capacitor (EDLC) has an environment-friendly impact and it has a lasting life than the conventional rechargeable battery. However, EDLC has the disadvantage of loss voltage by charge energy. In this paper, the single phase PWM inverter for UPS using buck-boost chopper with EDLC is applied in discrete-time model following control. It is established that this method compensates for output sine waveforms all regardless of rippling voltage in EDLC. The output voltage of the buck-boost chopper substantially covers charge energy in EDLC.