Design of Public Plug-in Electric Vehicle Charging Station for Improving LVRT Capability of Grid Connected Wind Power Generation

摘要

The growing worldwide mindfulness for a eco-friendly environment include with cost effective and greater accessibility of small scale generating units such as wind and PV which hoisted the interest in distributed generation. The promising emerging future transportation technology is Plug-in Electric Vehicle (PEV). But the issue coupled with the implementation of PEV is the utilities should upgrade the distribution system to meet the demand of this extra load. Thus the integration of microgrid and PEV with distribution system reduces the stress on distribution transformer to meet the demand of the extra load. In this work, the PEV charging station with small scale wind energy system as a primary source to this smart charging station. The control strategy proposed is the coordinate control based on DC link voltage to encourage the operation of PEV charging station in both standalone and grid connected mode. There is a drawback when using Doubly Fed Induction Generator (DFIG) based wind turbine is Low Voltage Ride Through (LVRT). In order to overcome from this issue the charged PEVs in the smart charging station is used to improve the LVRT capability.