TY - JOUR
T1 - A multi-control vehicle-to-grid charger with bi-directional active and reactive power capabilities for power grid support
AU - Tan, Kang Miao
AU - Padmanaban, Sanjeevikumar
AU - Yong, Jia Ying
AU - Ramachandaramurthy, Vigna K.
PY - 2019/3
Y1 - 2019/3
N2 - This paper proposes a multi-control vehicle-to-grid charger with bi-directional power capability. The proposed charger can perform vehicle battery charging and discharging operations, as well as power grid support such as reactive power compensation, power factor correction, and grid voltage regulation. The performances of the charger controls were examined under various power grid scenarios. Results revealed that the vehicle-to-grid charger attained the highest charger efficiency when operating at unity power factor mode. Nevertheless, vehicle charging at unity power factor introduced a significant grid voltage drop which may violate the grid voltage limits. This problem was solved by using the voltage control, which injected reactive power to the power grid for accurate voltage regulation. This paper also proposed an autonomous multi-control selection algorithm to intelligently switch between the multiple charger controls in response to the power grid condition. Results showed that the proposed algorithm effectively instructed the charger to work in efficient control modes if the grid voltage was within the permissible voltage limits. Whenever the grid voltage exceeded the limits, the charger automatically switched to grid voltage control for power grid voltage regulation.
AB - This paper proposes a multi-control vehicle-to-grid charger with bi-directional power capability. The proposed charger can perform vehicle battery charging and discharging operations, as well as power grid support such as reactive power compensation, power factor correction, and grid voltage regulation. The performances of the charger controls were examined under various power grid scenarios. Results revealed that the vehicle-to-grid charger attained the highest charger efficiency when operating at unity power factor mode. Nevertheless, vehicle charging at unity power factor introduced a significant grid voltage drop which may violate the grid voltage limits. This problem was solved by using the voltage control, which injected reactive power to the power grid for accurate voltage regulation. This paper also proposed an autonomous multi-control selection algorithm to intelligently switch between the multiple charger controls in response to the power grid condition. Results showed that the proposed algorithm effectively instructed the charger to work in efficient control modes if the grid voltage was within the permissible voltage limits. Whenever the grid voltage exceeded the limits, the charger automatically switched to grid voltage control for power grid voltage regulation.
KW - AC-DC power converters
KW - DC-DC power converters
KW - Electric vehicles
KW - Power conversion
KW - Reactive power control
KW - Voltage control
UR - http://www.scopus.com/inward/record.url?scp=85060940341&partnerID=8YFLogxK
U2 - 10.1016/j.energy.2019.01.053
DO - 10.1016/j.energy.2019.01.053
M3 - Journal article
AN - SCOPUS:85060940341
SN - 0360-5442
VL - 171
SP - 1150
EP - 1163
JO - Energy
JF - Energy
ER -