ZSI Impedance Source inverter integrated XFC ( Extreme fast charging ) for Electric Vehicle

This paper presents the application of an inverter named Improved Enhanced-Boost Quasi-Z-Source Inverter in AC-connected extreme fast charging (XFC) stations for electric vehicles (EVs), with the goal of reducing conversion stages and enhancing system efficiency. Currently, XFC stations are a focus of development due to their potential to match the refueling time of traditional fuel stations. AC-connected systems offer greater reliability for XFCs compared to DC-connected systems as they tend to have better fault tolerance and are less sensitive to power fluctuations. However, this increased reliability comes at the cost of greater complexity due to the need for multiple conversion stages—such as AC to DC and DC to the required voltage—making the overall system more intricate and potentially less efficient than DC-connected counterparts. The Improved Enhanced-Boost Quasi-Z-Source Inverter addresses this challenge by consolidating the DC-DC and DC-AC conversion stages into a single conversion process, thus simplifying the system, decreasing conversion losses, and improving overall efficiency. By operating at a higher modulation index, the inverter reduces stress on the switches, making it ideal for high-power applications. Analytical results and simulations highlight the inverter’s potential in advancing next-generation fast charging solutions by simplifying infrastructure and enhancing charging efficiency. This makes it a promising technology for supporting the future of electric vehicle charging.