Probabilistic quantification of voltage unbalance and neutral current in secondary distribution systems due to plug-in battery electric vehicles charging

摘要

The work of this paper investigates the expected impact of level 1 plug-in battery electric vehicle charging on increasing voltage unbalance, undervoltage violations, and neutral current within secondary distribution systems. Plug-in battery electric vehicles charging have been probabilistically modeled using a Monte Carlo simulation, which determines the expected impact on a secondary system extending from the IEEE 34 bus test distribution system. The impact of electric vehicle charging is compared for different penetration levels, different charging methods, and different proportions of electric vehicles charging on either split phase in the secondary system. Results of the Monte Carlo simulation show voltage unbalance and neutral currents are greater when electric vehicle charging is biased to one split phase as opposed to equally distributed amongst both split phases. Furthermore, voltage unbalance is found to increase the number of undervoltage violations experienced in the secondary system. (C) 2015 Elsevier B.V. All rights reserved.