PFC Optimization Modulation Strategy for Bidirectional Resonant Converter of V2G Charging Station

doi:10.16628/j.cnki.2095-8188.2025.06.005

Abstract

Abstract:

To improve the integration and performance of the bidirectional converter for electric vehicle bidirectional charging stations, a single-stage resonant three-port bidirectional converter with V2G, G2V and H2L modes is proposed. First, the equivalent model of the converter is established, and the mathematical model for the output power is derived. Then, the working modes of the converter are analyzed, and the resonant cavity current is designed. An optimized modulation strategy is proposed that balances low current stress and power factor correction(PFC)on the grid side. Finally, simulation analysis is conducted under PLECS. The results show that the converter achieves a high power factor on the grid side under both forward and reverse operating conditions while maintaining low current stress. The proposed optimization modulation strategy helps to improve the converter’s efficiency and the utilization rate of electrical energy in the power supply lines.

Key words: vehicle charging system, three-port converter, power factor correction, optimization modulation

CLC Number:

TM46

HUI Qi, ZHANG Jianwei. PFC Optimization Modulation Strategy for Bidirectional Resonant Converter of V2G Charging Station[J]. LOW VOLTAGE APPARATUS, 2025, 0(6): 32-37.

Figures/Tables 11

References 22

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参数	数值
电网侧母线电压有效值U_acrms/V	220
高压动力电池电压U_dc1/V	240
低压蓄电池电压U_dc2/V	12
V2G/G2V额定功率/W	2 500
H2L额定功率/W	500
N₁∶ N₂∶ N₃	10∶1∶7
电感L₃/μH	1
漏感L_k3/μH	7.4
谐振电容C_r/nF	460
半桥电容C_f1、C_f2/μF	3.3