Article

Krishnapriya Vinod, ASIET, KALADY; Anna Baby ,ASIET; Aryaraj B K ,ASIET

PHEV is a hybrid electric vehicle that uses rechargeable batteries or another energy storage device that can be recharged by plugging it into an external source of electric power. By using the PHEVs with grid connection we can decrease the fossil fuel consumption, therefore it provides stability, voltage control and frequency control. Uncoordinated charging of plug-in hybrid electric vehicles (PHEVs) will produce a series of negative effects on the electric grid. To solve this problem, we have to make smart-charging strategy by knowing PHEV charging characteristics. Here we use a bidirectional ac-dc converter and a bidirectional dc-dc converter. The main objective is to use bidirectional switching converter for PHEV to obtain high energy density, low volume and low weight. With the help of these bidirectional converters the excess charge in battery after charging PHEV can be fed back to the grid which can be utilized for load demands. This bi-directional charger must have the capability to charge a PHEV’s battery pack while producing minimal current harmonics and also have the ability to return energy back to the grid in accordance with regulations. There are two modes of operations i.e. charging and discharging modes of battery. The ac-dc controller act as a regulator during charging mode and as an inverter during discharging mode. Also, we use integrated controller for both modes to obtain performance of battery.