Design of Grid-side Power Management for Bidirectional DWPT Chargers on EV Roadways

Abstract

Dynamic Wireless Power Transfer (DWPT) entails an inherently transient power profiles from the electric grid. These power profiles, ranging from tens to hundreds of kilowatts, could expose the grid to significant stress, potentially affecting grid stability. This operating scenario occurs irrespective of the grid-to-vehicle (G2V) or vehicle-to-grid (V2G) charging infrastructure on EV roadways. In this paper, bidirectional DWPT system is designed which manages the grid-side transients, significantly reducing the grid peak-power transients for both G2V and V2G charging scenarios. Supercapacitor units are employed on the grid side as power-buffering units. This design does not require additional grid-side converters, and facilitates downsizing grid side power electronics and cable ratings.