Dual-Source Bidirectional Quasi-Z-Source Inverter Development for Off-Road Electric Vehicles

Abstract

In this paper, a battery pack and a supercapacitor bank hybrid energy storage system (HESS) with a new control configuration is proposed for electric vehicles (EVs). A bidirectional quasi-Z-source inverter (Bq-ZSI) and a bidirectional DC-DC converter are used in the powertrain of the EV. The scheme of the control for the proposed HESS Bq-ZSI using finite control set model predictive control (FCS-MPC) is first deduced to enhance the dynamic performance. With the idea of managing battery degradation mitigation, the fractional-order PI (FOPI) controller is then applied and associated with a filtering technique. The Opal-RT-based real-time simulation is next executed to verify the performance and effectiveness of the proposed HESS control strategy. As a result, the proposed HESS Bq-ZSI with this control scheme provides a quick response to the mechanical load and stable DC link voltage under the studied driving cycle. Moreover, the comparative results also show that the proposed HESS Bq-ZSI equipped with the new control configuration enables the reduction of the root-mean-square value, the mean value, and the standard deviation by 57%, 59%, and 27%, respectively, of the battery current compared to the battery-based inverter. Thus, the proposed HESS Bq-ZSI using these types of controllers can help to improve the EV system performance.

Multi-Criteria Ranking of Z-Source Inverter Topologies for a Three-Wheel Fuel Cell Hybrid Electric Vehicle

“…Thus, the selection of a suitable ZSI topology to replace the traditional one can result in superior performance and lower system weight and volume. This work is an extension of the paper in [16], where we presented approaches to lower down the system size and volume and to enhance the efficiency for EV-based power electronics systems.…”

“…The robustness of the FC-HEV against power variations is increased by embedding the BAT into the ZSN of the ZSI [15]. Regarding the control method and energy management strategy (EMS) of these dual-source topologies, a fractional-order PI controller and a fuzzy controller are employed to enhance the dynamic performance of the BAT current control in the HESS Bq-ZSIs in [16], [17]. Frequency diving coordinated controls are investigated to satisfy the demand of the dynamic responses and obtain optimal performance in terms of the dynamic power regulation and the BAT current stress [13], [14].…”

Nine-Switch Multiport Converter Applied to Battery-Powered Tramway with Reduced Leakage Current

“…As an alternative to traditional converters, several studies have explored more modern topologies. For instance, a quasi-Z converter was proposed in [21] to enhance performance and speed in battery control and management for off-road vehicles; however, the high number of magnetic components could result in reduced system efficiency. Another interesting converter for connecting a DC source to an AC load is the split-source inverter (SSI) presented in [22].…”

Trends and Challenges in Electric Vehicle Motor Drivelines - A Review

“…Electric vehicles are gaining large-scale acceptance, because of which there has been growing interest in optimizing driveline topologies for hybrid and fully electric vehicles. Studies on common motor drive for EV and HEV have been presented in [1,2]. The article examines the development of the EV with a focus on commercially available and upcoming electric motors.…”