Citation :

Luis Angel Jauregui Flores, Alex Yender Jihuaña Lopez, Joel Contreras Nuñez, "Technical Impact of Electric Vehicle Charger Integration in 10 kV Urban Distribution Networks," International Journal of Electrical and Electronics Engineering, vol. 13, no. 8, pp. 47-55, 2026. Crossref, https://doi.org/10.14445/23488379/IJEEE-V13I8P105

Abstract

The progressive integration of electric vehicles introduces new operational requirements in urban distribution networks, particularly when residential charging occurs under high-simultaneity conditions. This study evaluates the technical impact of integrating single-phase 7.3 kW chargers into a 10 kV urban distribution network, considering a sample of 64 distribution substations and deterministic scenarios ranging from one to four simultaneous chargers per substation. Steady-state power flow simulations were performed, and four technical indicators were analyzed: transformer loading, power factor, phase voltage in p.u., and conductor loading. The results indicate that the number of transformers exceeding 100% load increased from 3.1% to 17.2% when comparing the 7.3 kW and 29.2 kW scenarios. Under the latter scenario, the percentage of transformers with voltage below 0.95 p.u. increased from 12.5% to 25%, while the maximum conductor load increased from 81.2% to 89.9%. Although transformer loading improved, the reduction in thermal and voltage margins could not be offset. Most of the additional load was limited to resistive loads. The study demonstrates important limitations in system operation, which are vital for expanding the load infrastructure, prioritizing network investments, and managing network constraints.

Keywords

Home chargers, Power flow, 10 kV distribution network, Electric vehicles, Voltage control, Conductor loading.

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