ASSESSMENT OF ELECTRIC VEHICLES HOME CHARGING ACTIVITY IMPACTS ON RESIDENTIAL AREA AND ITS MITIGATIONS

• Main Author: Nornagoro, Adwitama
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/55206
• Institution: Institut Teknologi Bandung

Plug-in Hybrid Electric Vehicle (PHEV) and Battery Electric Vehicle have been widely used today. Battery pack prices go below $100/kWh and also policy announcements have been critical in stimulating the electric-vehicle rollout in major vehicle markets in recent years. Another factor, there were about 7.3 million chargers worldwide, of which about 6.5 million were private, slow chargers in homes. Apart from all the benefits of massive use of electric vehicles, problems may show up in electricity network systems, especially in a residential area, such as the power quality deterioration due to the harmonics of power converters, and also this may cause utility transformers to become overloaded due to simultaneous charging of electric vehicles at one time, and it affects to early aging of transformers. In several works, several methods are proposed to mitigate the impacts of EV charging on the distribution grid, EVs load charging activity management, and also charging strategies. This research aims to determine and observe the impact of EV home charging activity on utility transformers, losses, and voltage drop in a residential area along with the mitigations offered. Working under Monte-Carlo Sthocastic Simulation method due to uncertainty characteristic of EV needs, such as time of charging, battery level, also penetration level. Hereafter, observe the loading and aging process of the utility transformer in which based on IEEE Std C57.91-2011 and determine percentage loss of life transformer. Then proposed both dedicated feeder/line and utility transformer of general consumers and EV load for the technical mitigations, and also controlling of EV charging (Controlled Charging Scheme) by optimizing time and load of utility transformer as a coordinate charging management mitigation. The proposed system is simulated with ETAP 12.6 software.