International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 11 Issue: 09 | Sep 2024
p-ISSN: 2395-0072
www.irjet.net
DESIGN AND IMPLEMENTATION OF TWO PARALLEL INTERLEAVED DC-DC CONVERTER FOR EV FAST CHARGING Hema J P1, Dr. Madhu B R2, Dr. Hemalatha J N3 1Student, EEE Dept., RV College of Engineering, Bengaluru, India
2 Assistant Professor, EEE Dept., RV College of Engineering, Bengaluru, India 3 Associate Professor, EEE Dept., RV College of Engineering, Bengaluru, India ---------------------------------------------------------------------***---------------------------------------------------------------------
Abstract - In this paper, a single-phase EV charger and
use grid supply to charge the batteries. OBC’s allow users to charge their EV batteries wherever there is an availability of electric power channel [15]. The EV-battery is charged only when the car is at standstill, except for regeneration at decelerating, so, using the on-board traction system components to form an unified charging device is made possible.
its control strategy are presented with the potential to achieve desired power factor. In the proposed configuration, the dual-stage (AC-DC and DC-DC) integrated charger is composed of a single-phase AC/DC converter and the parallel interleaved DC-DC converter sharing the same dc-link. The entire system is designed for a 1-ϕ, 10 kW rating with a broad range DC output voltage of 200–400V for EV batteries and 230V, 50 Hz input supply Total harmonic distortion (THD) and the performance obtained are examined. The hardware prototype of the same is implemented.
EV charging systems are classified into Slow Charging System and Fast-Charging Systems: Level 1 and Level 2 on-board charging systems are commonly referred to as Slow Charging Systems. It takes 8 to 10 hours for Level 1 on-board charging systems to fully charge a power battery. Their output power is usually less than 10 kW, and they are mostly utilized in residential buildings. On the other hand, Level 2 charging systems charge a battery to its full capacity faster than Level 1 systems.
Key Words: Parallel interleaved converter, AC-DC Converter, DC-DC Converter, Electric Vehicle, Fast Charging, Total harmonic distortion, Pulse Width Modulation, Matlab, Simulink
1. INTRODUCTION
Fast-Charging Systems, sometimes referred to as Level 3 charging systems, have the capacity to produce high currents of up to 400 A and can finish charging power batteries in 20 to 30 minutes, with a typical range of 50 kW to 350 kW.
Electric mobility makes a significant contribution to the development of sustainable and effective alternatives in the transportation sector given the severe regulations on emissions, fuel efficiency, global warming challenges, and limited energy resources [1-7]. In [8], an assessment based on the current environment and anticipated technological advancements for electric vehicle (EV) propulsion is offered. The electric vehicle (EV) has a number of benefits over traditional gasoline-powered cars. The researcher must focus deeply on the electrification of transportation to incorporate it effectively. In order to incorporate them into the present distribution system, it is required to establish specific efficient control mechanisms must be created [9-11]. Number of strategies related to the power quality issues associated with charging battery packs present are explained for the EV chargers [12-13].
2. METHODOLOGY Figure 1 depicts the methodology of the proposed system. It consists of dual-stage conversion: a single-phase AC-DC stage and an interleaved DC-DC stage. Single-phase AC/DC converters, consists of four- active switches (𝑆1,𝑆2,𝑆3,𝑆4), coupled to two split capacitors (𝐶1𝑎𝑛𝑑𝐶2), connects to a DC link. Virtually all capacitors have neutral potential at their midpoint. EV charger applications that require high DC input voltages and low duty ratios are suitable for the DC link voltage that feeds a parallel IBC. The recommended DC-DC stage is an interleaved buck DC-DC converter with zero resonant current switching, which is suitable for low-voltage and high-current applications. This converter is made from the standard buck converter by connecting a second order LC filter.
The process of charging the EV refers to the electronic communication between the EV battery and the grid power supply. The purpose is to avoid overloading and to confirm safety. There are various kinds of energy storage systems (batteries). Li-ion batteries have highest energy density and low self-discharging rate, compared to other batteries, and hence, has a potential world market. Li-ion storage cells are generally functional in EVs because of their light weight. EVs
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