From just less than 0.10 % EVs on roads today, the impact on electricity grids is still minimal. Vision statements see electric traction with battery-driven motors as the primary mode of mobility. An increase in electric traction will require additional power sources With growing demand on clean electricity and its attendant issues, EVs can step in as a source of energy, in a reverse charging process, EVs can feed in power to the grid, in a reversal of roles. In a global scenario of networked micro-grids, EVs could serve as a reliable and flexible battery storage system. The key lies in facilitating reverse charging, whilst maintaining EV battery and grid stability.
Researchers at the University of Waterloo have been successful in the development and validation of a single-phase, two-stage bidirectional charger model. The model can integrated with simulation systems, allowing researchers a deeper analysis of distribution network impact, voltage interaction with other chargers and loads in distribution systems.