Performance evaluation of distribution network in presence of Plug-in Electric Vehicles through a new index

In recent decades, the presence of Plug-in Electric Vehicles (PEVs) has increased in the distribution networks. PEVs are probabilistic loads that can have negative effects on the performance of the distribution networks. These effects include overloads, losses, voltage drops, and unbalances that may take place in the distribution networks by PEV charging. Hence, the use of important and practical indices to assess a distribution network can be useful. It should be noted that it is very difficult to compare between the effects of different indices for the penetration level of the specified PEVs using the available indices. In order to compare the effects of different indices, the available ones are modified and then a new index is proposed based on the modified indices. The IEEE-37 node test feeder is used to assess the performance of the modified and proposed indices. Simulation results show the flexibility and precision of the proposed approach.