Name: Ezhil Reena Joy
Year : 2009-2015
Thesis : Title: Modeling and Analysis of Electric Vehicle Charging Interface
As the energy demand and environmental issues are becoming increasingly prominent, the
research on Electric Vehicles (EV) and Charging Systems are very important for the development
and popularization of EVs. If EVs are used more in Road, the increased penetration of EVs in real
time may results in voltage rise or drop at the distribution node. An idea of active and reactive
power exchange through contact based multiple EV charging system for voltage regulation at the
distribution node has been developed. To handle multiple EVs arrived at the charging station and
to regulate the distribution node, the complete charging station is externally controlled by fuzzy
controller and an aggregator based on node voltage variations and energy availabilities of EVs.
Further, to increase safety and reduce the maintenance time, the charging system has to be
developed with contactless system. An operating framework of parallel connected multiple
bidirectional contactless charging system is presented. To coordinate the complete Charging
system, a control strategy is developed to manage the parallel connected AC lines by scheduling
the charging and discharging operations of EVs.
The computation of mutual inductance between two coils is a classical problem in
Electrical Engineering. An analytical approach based on Biot-Savart Law is developed for
computing the Mutual Inductance between 2 air core square coils are presented and the results are
verified with finite element method and an experimental approach. Due to large leakage
inductance, compensation circuits are connected on both sides of contactless coils. The study
investigates the behavior of contactless system under variable frequency, load and distance. The
analysis compares the efficiency of four compensation topologies such that the real time
performance of contactless system can be analyzed.