Reducing capacitances of DC capacitors in smart charger for electric vehicles in single-phase three-wire distribution feeders with sinusoidal charging and discharging for Li-ion batteries
Reducing capacitances of DC capacitors in smart charger for electric vehicles in single-phase three-wire distribution feeders with sinusoidal charging and discharging for Li-ion batteries
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锂离子电池正弦充放电单相三线配电馈线电动汽车智能充电机直流电容器降容
DOI：
10.1109/gcce.2017.8229430
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
and Masayuki Okamoto
中科院分区：
文献类型：
--
作者：
Yuki Okamoto;Fuka Ikeda;Kei Nishikawa;Hiroaki Yamada;Toshihiko Tanaka;and Masayuki Okamoto
本文讨论了先前提出的单相三线配电馈线中电动汽车用正弦充放电锂离子电池智能充电器（SC）中直流电容器电容的减少。检测 SC 中包含的三桥臂脉宽调制 (PWM) 整流器的直流电容器电流，然后将其添加到双向 DC-DC 转换器的电池充电或放电电流的参考值中。将检测到的直流电容器电流与直流-直流转换器的参考值相加，可以吸收 PWM 整流器和双向转换器的直流电容器中的电压纹波。这导致直流电容器的电容显着减小。仿真结果表明，实现了具有单位功率因数的平衡源电流，减少了先前提出的 SC 中直流电容器的电容。
This paper discusses reduction of capacitances of dc capacitors in the previously proposed smart charger (SC) with a sinusoidal charging-discharging lithium-ion battery for electric vehicles in single-phase three-wire distribution feeders. The dc-capacitor current of the three-leg pulse-width modulated (PWM) rectifier, which is included in the SC, is detected, and then added to the reference value of the battery-charging or - discharging current for a bidirectional dc-dc converter. Addition of the detected dc-capacitor current to the reference value for the dc-dc converter sinks the voltage ripples in the dc capacitors of both the PWM rectifier and bidirectional converter. This results in a substantial reduction in the capacitances of the dc capacitors. Simulation results demonstrate that balanced source currents with a unity power factor are achieved, reducing the capacitances of the dc capacitors in the previously proposed SC.