Grid-Tied Single-Phase Bi-Directional PEV Charging/Discharging Control

Abstract

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.

Distributed Electric Vehicle Charging Scheduling with Transactive Energy Management

“…The charging needs of large-scale electric vehicles could cause significant impacts on the power grid, including overloading, frequency deviation, and voltage violations [2]. To mitigate these impacts, smart EV charging scheduling and control are extensively explored for a microgrid [3][4][5]. To expand large-scale EV charging in distribution networks, Cao et al [6] formulated a large-scale EV charging control solution without violating node and substation power limitations.…”

Scaling-Factor and Design Guidelines for Shielded-Capacitive Power Transfer

“…The CPT system offers advantages in lightweight, contactless, and electromagnetic interference (EMI) reduction. These advantages allow the CPT system to compromise a suitability-integrated system for available EV charging, such as in-vehicle grid interaction [17,18] and the grid-tied plug-in EV charging system [19,20]. In the study by [17,19], the potential of the CPT system can be used to replace the cable between the grid-connected EV Supply Equipment (EVSE)-Plug-in EV (PEV) (EVSE-PEV) and the EV itself.…”

Electric Vehicle–Grid Integration with Voltage Regulation in Radial Distribution Networks

“…However, PEVs also bring challenges to the operation of the power grid if the penetration of PEVs increases. Some of our previous studies [1][2][3] focus on PEV charging scheduling and optimization within a microgrid, such as via load shaping, charging cost minimization, etc. Study [4] uses the real-time simulation method to validate the PEV charging control algorithm in a VGI microgrid.…”