Generally, DC fast-charging stations for EVs are designed to supply about 50 kW of power [15]. The established trend is to place these chargers off-board as these stations are bulky. The general block diagram of a DC fast-charging station is shown in Fig. 1, and the charger is connected to a common AC link.
EV battery chargers can be integrated into an EV as an on-board charger or separated as an off-board charger. The power flows between the grids, and EV batteries can be unidirectional or bidirectional. The unidirectional power flow chargers are used as grid-to-vehicle charger applications, and bidirectional power flow chargers are used as grid-to-vehicle and vehicle-to-grid charger applications [16]. Unidirectional chargers can be controlled to charge the EV battery from the grid [17,18,19].
This paper presents a review of the recent battery-charging infrastructure for EVs in terms of converter topologies and power control strategies. From the analysis, the suitable converter has selected and simulated with a suitable controller based on the requirement of DC fast charger. In addition, three topologies of Vienna rectifier have been simulated. Based on the results of input current harmonics, output voltage, output current, and efficiency of three topologies of Vienna rectifier are analysed, and the graphs are plotted.
The primary goal of using a boost converter instead of the conventional diode bridge rectifier is to improve power factor, to reduce the harmonics at the end, and to have a controlled DC voltage at the output if unwanted perturbations occur at the AC end.
The significant achievement in using the SWISS rectifier is to provide better efficiency compared to the conventional rectifiers. Compared to boost-type converter, buck-type system provides a wide output voltage control range, while maintaining PFC capability in the input, enables direct start-up, and allows for dynamic current limitations at the output.
The matrix converter is shown in Fig. 4, and these rectifiers are used for the regenerative operation of charging stations where it has to be used for the vehicle-to-grid applications with high efficiency [28].
Matrix converter is a forced commutated converter that uses an array of controlled bidirectional switches which allows high-frequency operations. This type of converter does not require DC-link circuit and any large energy storage element. It can improve the power factor and reduce the harmonics in the line current at the end.
Some of the features of the converter topologies are discussed and are highlighted in Table 2. From the detailed review of the few converter topologies, it can be concluded that the use of the Vienna rectifier for the implementation of the charging station is appropriate, due to the following reasons:
In this paper, the PFC consisting of PI controller has been analysed for improving the power quality such as harmonics and power factor. The PFC with the PI controller is shown in Fig. 6. Other control strategies such as adaptive control, fuzzy logic control, sliding mode control, predictive control, or neural network control can be applied to improve the performance of the charging stations.
About Vienna energy storage for electric vehicles
As the photovoltaic (PV) industry continues to evolve, advancements in Vienna energy storage for electric vehicles have become critical to optimizing the utilization of renewable energy sources. From innovative battery technologies to intelligent energy management systems, these solutions are transforming the way we store and distribute solar-generated electricity.
When you're looking for the latest and most efficient Vienna energy storage for electric vehicles for your PV project, our website offers a comprehensive selection of cutting-edge products designed to meet your specific requirements. Whether you're a renewable energy developer, utility company, or commercial enterprise looking to reduce your carbon footprint, we have the solutions to help you harness the full potential of solar energy.
By interacting with our online customer service, you'll gain a deep understanding of the various Vienna energy storage for electric vehicles featured in our extensive catalog, such as high-efficiency storage batteries and intelligent energy management systems, and how they work together to provide a stable and reliable power supply for your PV projects.
Related Contents
