Abstract:
Due to rising fossil fuel prices and accelerating carbon dioxide (CO2) emissions,
the use of electric vehicles (EVs) has grown over the past few years. At present EV
charging stations use the existing utility power grid, and hence there is an increase
in load demand at the distribution side and thereby stress on the utility grid. There
are different solutions for this problem, mainly PV integration, Power factor correc tion (PFC) in chargers, managed charging, indirect power demand reduction, etc.
For a level 1 EV charging, AC to DC conversion and also its power factor correction
is necessary. There are multiple problems with the diode bridge rectifier used in
typical chargers, notably conduction loss and nonlinear characteristics. Bridge rec tifiers with input diodes operate poorly, are inefficient, and also have a low power
factor. This project focuses on important EV power demand reduction strategies
like PFC, charging with on-site renewable energy, and indirect power demand re duction. This project make use of a novel Cuk-SEPIC converter with fuzzy logic
control for PFC and calculating its power factor.This topology is compared with
two other converter topologies (Cuk-push-pull, and Cuk-flyback). All these con verters are designed to work in discontinuous conduction mode. The Cuk-SEPIC
converter is the integration of both Cuk and SEPIC converters in which the Cuk
converter works in the positive half and the SEPIC converter works in the negative
half cycle. The next objective is the integration of PV in level 2 charging along
with its design, cost analysis, and simulations for reducing power demand on the
grid
