A novel DC voltage protection method for three-phase boost converter

The three-phase space vector pulse-width-modulation (SVPWM) ac/dc voltage source converter can draw almost pure sinusoidal current from ac source and maintain dc voltage stable. The dc voltage stability is one of the most important control tasks. Traditionally, the dc voltage is measured through a voltage sensor. But only depending on a sensor, the system reliability cannot be improved. Based on the predictive and real-time sampling technologies, this paper presents a novel control strategy, which can make the input ac current keep the high quality, and has the monitoring function of the dc voltage, so that the dc voltage information not only comes from the dc voltage sensor, but also can obtain from other control information.