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Grid-Tied Single-Phase Bi-Directional PEV Charging/Discharging Control
ISSN: 1946-4614, e-ISSN: 1946-4622
Published April 05, 2016 by SAE International in United States
Citation: Wang, L., Cao, C., and Chen, B., "Grid-Tied Single-Phase Bi-Directional PEV Charging/Discharging Control," SAE Int. J. Passeng. Cars – Electron. Electr. Syst. 9(2):275-285, 2016, https://doi.org/10.4271/2016-01-0159.
This paper studies the bi-directional power flow control between Plug-in Electric Vehicles (PEVs) and an electrical grid. A grid-tied charging system that enables both Grid-to-Vehicle (G2V) and Vehicle-to-Grid (V2G) charging/discharging is modeled using SimPowerSystems in Matlab/Simulink environment. A bi-directional AC-DC converter and a bi-directional DC-DC buck-boost converter are integrated to charge and discharge PEV batteries. For AC-DC converter control, Predictive Current Control (PCC) strategy is employed to enable grid current to reach a reference current after one modulation period. In addition, Phase Lock Loop (PLL) and a band-stop filter are designed to lock the grid voltage phase and reduce harmonics. Bi-directional power flow is realized by controlling the mode of the DC-DC converter. Simulation tests are conducted to evaluate the performance of this bi-directional charging system. The simulation results show that the integrated PCC, PLL, and band-stop filter can achieve fast dynamic response, low Total Harmonics Distortion (THD) of grid voltage and current, and unity power factor.