TITLE:
Comparison among Chargers of Electric Vehicle Based on Different Control Strategies
AUTHORS:
Pengxin Hou, Chunlin Guo, Yubo Fan
KEYWORDS:
Electric Vehicle Charger; APFC; Control Strategy; Power Factor; Harmonic
JOURNAL NAME:
Energy and Power Engineering,
Vol.5 No.4B,
November
20,
2013
ABSTRACT: The charger of electric vehicle is a power electronic device which consists of rectifying devices and
DC-DC converters. This nonlinear diode rectifier circuit has low power factor and
high harmonic content. In order to improve power factor and reduce the harmonic
distortion rate of the AC side current, single-phase non-controlled rectifier
charger needs to install the active power factor correction device. A piece of
power system analysis software which is called PSCAD is used in modeling of an
EV charger which contains Boost-APFC. By means of simulation and analysis,
differences of APFC characteristics between the hysteresis current control mode
and average current control mode which has an influence on the power grid are compared.
The consequence of simulation shows that the two control strategies achieve
power factor correction and harmonic reduction requirements; Boost type power
conversion circuit employs the average current control mode is better, which
has following features: relatively faster settling time of the output voltage, relatively
smaller overshoot, lower current harmonic distortion rate on AC side, lower
switching frequency and better control effect.