EVs Grid Integration Performance Evaluation and Congestion Prevention

Abstract

The ecosystem friendly and socio-economical merits of Electrical Vehicles (EVs) have enhanced its application globally. Although it is widely argued that EVs grid integration undermines power system security, reliability and upsurge electricity consumption, but the benefits in emission reduction is enormous, which conforms to the Asian Pacific Partnership on Clean Development and Climate agreement with US. However, the purpose of this study is to evaluate the impact of EVs on Medium Voltage (MV) distribution network: voltage stability and thermal overloading of transformers and cables on an IEEE 14-Bus system. The proposed method is a holistic approach in which the impact on the steady state operation of individual components (EV charger, load, transformers, buses, etc) of the system would be investigated for reliability. A load flow analysis would also be conducted on the network for power loss evaluation. However, the anticipated results of this study show that integration of large number of EVs to grid system increased line losses, transformer and cable overloading, and reduced system stability, hence, the needed for grid architecture compensation cannot be overemphasized. Therefore, the results after Bus compensation should show improved system stability, voltage profile, reduced thermal loading and congestion.