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Topology of a Bidirectional Converter for Energy Interaction between Electric Vehicles and the Grid

1,*, 1,2,* and 2
School of Electrical Engineering, Beijing Jiaotong University, Beijing 100044, China
Department of Electrical and Computer Engineering, Wayne State University, Detroit, MI 48202, USA
Authors to whom correspondence should be addressed.
Energies 2014, 7(8), 4858-4894;
Received: 16 April 2014 / Revised: 18 July 2014 / Accepted: 21 July 2014 / Published: 30 July 2014
(This article belongs to the Special Issue Advances in Hybrid Vehicles)
PDF [3048 KB, uploaded 17 March 2015]


In vehicle-to-grid (V2G) systems, electric vehicles interact with the grid as distributed energy storage systems that offer many potential benefits. As an energy interface between a vehicle and the grid, the bidirectional converter plays a crucial role in their interaction. Its reliability, safety, cost, efficiency, weight, size, harmonics, and other factors are of essential importance for V2G realization, especially for on-board operations. Beyond the common existing topologies for bidirectional chargers, this paper introduces a novel high-power-factor bidirectional single-stage full-bridge (BSS-FBC) topology, which offers advantages in power density, size, weight, cost, efficiency, power quality, dynamic characteristic, reliability, and complexity. Its operational principles and control strategies are presented. Harmonic analysis on the basis of double-Fourier integral is performed with detailed comparison of line current harmonic characteristics between the BSS-FBC topology and unipolar/bipolar controlled single-phase pulse width modulation (PWM) converters. A dynamic model of the topology is derived, its dynamic behavior analyzed, and its compensator design method developed. Simulation and experimental results are employed to verify the design and analysis. Design considerations for the key parameters are discussed. A 3.3 kW prototype is developed for this topology and validated in its vehicle applications. The results demonstrate clearly the benefits and advantages of the new topology. View Full-Text
Keywords: vehicle-to-grid; bidirectional converter; single-stage; harmonic analysis; dynamic characteristic vehicle-to-grid; bidirectional converter; single-stage; harmonic analysis; dynamic characteristic

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Jiang, J.; Bao, Y.; Wang, L.Y. Topology of a Bidirectional Converter for Energy Interaction between Electric Vehicles and the Grid. Energies 2014, 7, 4858-4894.

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