NDLI: Start-up circuit for an electric vehicle fast charger using SSICL technique and a slow estimator

Content Provider	IET Digital Library
Author	Tashakor, Nima Arabsalmanabadi, Bita Ghanbari, Teymoor Farjah, Ebrahim Götz, Stefan
Abstract	With the increase in power rating of electric vehicle chargers, concerns regarding their integration to the grid have likewise grown. This paper investigates a novel technique for start-up of high-power fast electric vehicle (EV) charger using a solid-state inrush current limiter (SSICL). The circuit consists of three similar sets of bidirectional switch and limiting resistor that utilizes a control strategy based on a simple Kalman filter (KF) to suppress the converter start-up current and transient over-voltages. In fact, the built-up profile of the inrush current is dictated in accordance with the estimated current by the slow dynamic KF. Compared to alternatives, such as start-up resistors, the presented SSICL achieves faster start-up with comparable peak current, tends to provide lower distortion, and provides a good balance between speed and efficiency. Simulation and experimental results confirm that the proposed method can considerably suppress inrush currents, while improving the total harmonic distortion. Comparing the behaviour of the SSICL to other relevant techniques underlines the advantages of the proposed solution. Furthermore, although the focus of this paper is start-up of the fast EV chargers, the proposed circuit can act as an inrush-current limiter in most AC to DC converter structures.
Starting Page	2247
Ending Page	2255
Page Count	9
ISSN	17518687
Volume Number	14
e-ISSN	17518695
Issue Number	Issue 12, Jun (2020)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-gtd/14/12
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-gtd.2019.1477
Journal	IET Generation, Transmission & Distribution
Publisher Date	2020-02-26
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Battery Chargers Battery Powered Vehicle Bidirectional Switch Charging Process Control of Electric Power System Control Strategy Converter Start Current Limiters DC-DC Power Converter Electric Vehicle Chargers Fast EV Charger Filtering Method in Signal Processing Harmonic Distortion High-power Fast EV Charger Inrush Current Kalman Filter Limiting Resistor Power Grid Power Rating Protection Apparatus Slow Dynamic KF Slow Estimator Soft Start-up Solid-state Inrush-current Limiter SSICL Technique Start-up Resistors Switching Converter Total Harmonic Distortion Transient Over-voltages Transportation
Content Type	Text
Resource Type	Article
Subject	Control and Systems Engineering Energy Engineering and Power Technology Electrical and Electronic Engineering

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