ANNOUNCEMENTS
The technological developments seen in the energy sector has led many breakthrough technologies like Electric Vehicles, Solar Rooftop PV systems, Demand Response, Energy Storage etc. to make transformational changes in power systems. Un-planned integration of these technologies may adversely affect the distribution networks, so special attention has to be given to assess their impacts for implementing the necessary reinforcement measures.
The latest developments in the Electric Vehicle landscape in India indicates a strong growth of EV Charging network, in this context this study aims to assist the utilities by analyzing the feeder at different EV penetration levels, evaluating the EV hosting capacity, and analyzing the effect of DG power injection. The studies reported in the literature have given insights to different tools and methodologies to work on the objectives. Due to limitations of data availability of actual feeders, the study has considered using simplified IEEE 13 node feeder for the analysis. Different scenarios have been analyzed using a MATLAB load flow model for the unbalanced distribution networks.
The base case load flow study has shown that that feeder is already heavily loaded with a limited spare capacity in the input section. Further, loading as per the EV penetration levels helped in identifying the sections of the feeder that need upgradation. The EV Hosting capacity in case of residential feeder was 13% in the uniform loading scenario, while it improved to 15% and 19% in managed loading scenarios re-affirming the need of planned integration.
The analysis of the feeder with DG power injection has resulted in a multifold improvement in the EV Hosting capacity, which establishes that the diverse Distributed Energy Resources are complementary to each other and can provide the distribution network with services for delivering the reliable and sustainable power.
Key Words: Distributed Energy Resources (DERs), Electric Vehicles (EVs), Hosting Capacity, Distribution Load Flow Analysis and Charging Infrastructure.
