Four-Quadrant Operations of Bidirectional Chargers for Electric Vehicles in Smart Car Parks: G2V, V2G, and V4G

Tingting He, Dylan Dah-Chuan Lu, Mingli Wu, Qinyao Yang, Teng Li and Qiujiang Liu
Additional contact information
Tingting He: School of Electrical Engineering, Beijing Jiaotong University, Beijing 100044, China
Dylan Dah-Chuan Lu: Faculty of Engineering and Information Technology, University of Technology Sydney, Sydney, NSW 2007, Australia
Mingli Wu: School of Electrical Engineering, Beijing Jiaotong University, Beijing 100044, China
Qinyao Yang: School of Electrical Engineering, Beijing Jiaotong University, Beijing 100044, China
Teng Li: School of Electrical Engineering, Beijing Jiaotong University, Beijing 100044, China
Qiujiang Liu: School of Electrical Engineering, Beijing Jiaotong University, Beijing 100044, China

Energies, 2020, vol. 14, issue 1, 1-17

Abstract: This paper presents the four-quadrant operation modes of bidirectional chargers for electric vehicles (EVs) framed in smart car parks. A cascaded model predictive control (MPC) scheme for the bidirectional two-stage off-board chargers is proposed. The controller is constructed in two stages. The model predictive direct power control for the grid side is applied to track the active/reactive power references. The model predictive direct current control is proposed to achieve constant current charging/discharging for the EV load side. With this MPC strategy, EV chargers are able to transmit the active and reactive powers between the EV batteries and the power grid. Apart from exchanging the active power, the vehicle-for-grid (V4G) mode is proposed, where the chargers are used to deliver the reactive power to support the grid, simultaneously combined with grid-to-vehicle or vehicle-to-grid operation modes. In the V4G mode, the EV battery functions as the static var compensator. According to the simulation results, the system can operate effectively in the full control regions of the active and reactive power (PQ) plane under the aforementioned operation modes. Fast dynamic response and great steady-state system performances can be verified through various simulation and experimental results.

Keywords: model predictive control; bidirectional two-stage charger; electric vehicle (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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