Ride through capabilities of voltage source inverter (VSI) during short power interruptions

Voltage source inverter has been widely used inside the variable speed drive as industrial and commercial facilities. Ride-through capabilities of a VSI can be describe as the ability of the machine or drive to sustain power supply to a load during short power interruptions (SPI). SPI can occur when the power quality of the mains drop eventually close to the magnitude zero of the voltage waveform for a few cycles. As for today, power electronics technologies are very sensitive toward this SPI which sometimes can causes the system to be momentary interrupted or even permanently tripped out. In this paper, a study on how long the VSI can maintain the power flow and keeping the load running when the SPI occurs and methods to improve its capabilities will be carries out. The study comprises of two approaches, which are by experimental, and simulation. Both results from the studies will be compared and elaborated.