Hosting Capacity of Electric Vehicles on LV/MV Distribution Grids-A New Methodology Assessment

The need to evolve cleaner, decentralized, and digitalized energy distribution systems and services includes the electrification of means of transport as Electric Vehicles (EVs) achieve a greater market share. In this context, this work presents and applies, through a case study, the proposal of a new methodology for calculating the hosting capacity of EVs in low- and medium-voltage distribution systems. The proposal of a new methodology that combines deterministic and stochastic methods, while considering several operational criteria, as well as being applicable in both low and medium voltage, shows itself as a more germane and innovate approach. The results obtained demonstrated that the hosting capacity of EVs for the transformers pertinent to the distribution system under study is 100% for more than 50% of the simulations performed. The conductor overload criterion is the main limiting factor, representing 36.69% of violations for the 3.6 kW charger and 52.14% for the 7 kW charger. According to the executed evaluated projections, the distribution system under investigation will posses the capacity to host the growth of EVs in any of the scenarios presented in this study until 2025 for the 3.6 kW charger.

Automated summary

This study presents a new methodology for calculating the hosting capacity of electric vehicles (EVs) in low- and medium-voltage distribution systems, and applies it through a case study. The proposed methodology combines deterministic and stochastic methods, considers multiple operational criteria, and is applicable in both low and medium voltage. The results show that the hosting capacity of EVs for the transformers in the distribution system under study reaches 100% in more than 50% of the simulations. The main limiting factor is conductor overload, accounting for 36.69% violations for the 3.6 kW charger and 52.14% for the 7 kW charger. Based on the evaluated projections, the distribution system is capable of accommodating the growth of EVs until 2025 for the 3.6 kW charger in any of the scenarios presented in this study.