New modified carrier-based level-shifted PWM control for NPC rectifiers considered for implementation in EV fast chargers

IF 1.2 4区计算机科学 Q4 COMPUTER SCIENCE, ARTIFICIAL INTELLIGENCE Turkish Journal of Electrical Engineering and Computer Sciences Pub Date : 2023-11-30 DOI:10.55730/1300-0632.4046

Merve Mollahasanoglu, Hakki Mollahasanoglu, H. Okumus

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Abstract

: In this study, the aim is to evaluate three-phase (3 ϕ ) AC/DC neutral point-clamped (NPC) power factor-corrected (PFC) multilevel converter performance for electric vehicle (EV) fast chargers. Power factor correction for EV fast chargers is very important in terms of eﬀicient power usage and charger compatibility with the grid. Multilevel converters improve charging eﬀiciency, reduce voltage stresses on components, minimize electromagnetic interference, and support high power capabilities. For this reason, multilevel converters with the PFC feature contribute to the reliable and effective operation of the fast-charging infrastructure. Rectifier analysis is tested with extensive simulations using a new modified carrier-based level-shifted pulse-width modulation (PWM) technique. The results obtained are in accordance with international standards. The proposed PWM technique provides low voltage regulation, low total harmonic distortion input current, unit input power factor, and a well-regulated DC bus voltage for the NPC rectifier in fast charging systems, and the system has high eﬀiciency. In addition, the modulation method eliminates the need for an additional PFC circuit. The system demonstrates remarkable success in addressing critical parameters such as capacitor voltage balance. This modified carrier-based PWM is highly successful for NPC rectifiers designed for DC fast chargers, rated for power up to 300 kW. The simulation results of the DC fast charger system demonstrate the validity and flexibility of the proposed carrier-based level-shifted PWM method

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考虑在电动汽车快速充电器中采用新的改进型载波电平偏移 PWM 控制 NPC 整流器

:本研究旨在评估用于电动汽车（EV）快速充电器的三相（3 ϕ）交直流中性点钳位（NPC）功率因数校正（PFC）多电平转换器的性能。电动汽车快速充电器的功率因数校正对于高效用电和充电器与电网的兼容性非常重要。多电平转换器可提高充电效率，降低元件的电压应力，最大限度地减少电磁干扰，并支持高功率能力。因此，具有 PFC 功能的多电平转换器有助于快速充电基础设施可靠、有效地运行。整流器分析通过大量模拟进行了测试，使用的是一种新的基于载波的改进型电平偏移脉宽调制（PWM）技术。结果符合国际标准。所提出的 PWM 技术可为快速充电系统中的 NPC 整流器提供低电压调节、低总谐波失真的输入电流、单位输入功率因数和调节良好的直流母线电压，并且系统具有高能效。此外，这种调制方法无需额外的 PFC 电路。该系统在解决电容器电压平衡等关键参数方面取得了显著成功。这种改进的基于载波的 PWM 非常适用于为直流快速充电器设计的 NPC 整流器，其额定功率可达 300 kW。直流快速充电器系统的仿真结果证明了所提出的基于载波的电平偏移 PWM 方法的有效性和灵活性。

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来源期刊

Turkish Journal of Electrical Engineering and Computer Sciences COMPUTER SCIENCE, ARTIFICIAL INTELLIGENCE-ENGINEERING, ELECTRICAL & ELECTRONIC

CiteScore

2.90

自引率

9.10%

发文量

审稿时长

6.9 months

期刊介绍： The Turkish Journal of Electrical Engineering & Computer Sciences is published electronically 6 times a year by the Scientific and Technological Research Council of Turkey (TÜBİTAK) Accepts English-language manuscripts in the areas of power and energy, environmental sustainability and energy efficiency, electronics, industry applications, control systems, information and systems, applied electromagnetics, communications, signal and image processing, tomographic image reconstruction, face recognition, biometrics, speech processing, video processing and analysis, object recognition, classification, feature extraction, parallel and distributed computing, cognitive systems, interaction, robotics, digital libraries and content, personalized healthcare, ICT for mobility, sensors, and artificial intelligence. Contribution is open to researchers of all nationalities.