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Energies 2017, 10(6), 797; doi:10.3390/en10060797

Constant DC-Capacitor Voltage-Control-Based Harmonics Compensation Strategy of Smart Charger for Electric Vehicles in Single-Phase Three-Wire Distribution Feeders

1
Department of Electrical and Electronic Engineering, Yamaguchi University, 2-16-1 Tokiwadai, Ube, Yamaguchi 755-8611, Japan
2
Department of Electrical Engineering, National Institute of Technology, Ube College, 2-14-1 Tokiwadai, Ube, Yamaguchi 755-8555, Japan
These authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Academic Editor: Jose Fernando Alves da Silva
Received: 17 March 2017 / Revised: 6 June 2017 / Accepted: 6 June 2017 / Published: 12 June 2017
(This article belongs to the Special Issue Power Electronics in Power Quality)
View Full-Text   |   Download PDF [1345 KB, uploaded 12 June 2017]   |  

Abstract

This paper discusses harmonic current compensation of the constant DC-capacitor voltage-control (CDCVC)-based strategy of smart chargers for electric vehicles (EVs) in single-phase three-wire distribution feeders (SPTWDFs) under nonlinear load conditions. The basic principle of the CDCVC-based harmonics compensation strategy under nonlinear load conditions is discussed in detail. The instantaneous power flowing into the three-leg pulse-width modulated (PWM) rectifier, which performs as a smart charger, shows that the CDCVC-based strategy achieves balanced and sinusoidal source currents with a unity power factor. The CDCVC-based harmonics compensation strategy does not require any calculation blocks of fundamental reactive, unbalanced active, and harmonic currents. Thus, the authors propose a simplified algorithm to compensate for reactive, unbalanced active, and harmonic currents. A digital computer simulation is implemented to confirm the validity and high practicability of the CDCVC-based harmonics compensation strategy using PSIM software. Simulation results demonstrate that balanced and sinusoidal source currents with a unity power factor in SPTWDFs are obtained on the secondary side of the pole-mounted distribution transformer (PMDT) during both the battery-charging and discharging operations in EVs, compensating for the reactive, unbalanced active, and harmonic currents. View Full-Text
Keywords: smart charger; single-phase three-wire distribution feeders (SPTWDFs); harmonics compensation; constant DC-capacitor voltage control (CDCVC); three-leg PWM rectifier; bidirectional DC-DC converter; single-phase PLL circuit; single-phase d-q coordinate smart charger; single-phase three-wire distribution feeders (SPTWDFs); harmonics compensation; constant DC-capacitor voltage control (CDCVC); three-leg PWM rectifier; bidirectional DC-DC converter; single-phase PLL circuit; single-phase d-q coordinate
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Ikeda, F.; Yamada, H.; Tanaka, T.; Okamoto, M. Constant DC-Capacitor Voltage-Control-Based Harmonics Compensation Strategy of Smart Charger for Electric Vehicles in Single-Phase Three-Wire Distribution Feeders. Energies 2017, 10, 797.

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