INTERNATIONAL JOURNAL OF LATEST TECHNOLOGY IN ENGINEERING,
MANAGEMENT & APPLIED SCIENCE (IJLTEMAS)
ISSN 2278-2540 | DOI: 10.51583/IJLTEMAS | Volume XIV, Issue XII, December 2025
Fig. 5. showing maximum feeder loading percentages under four EV charging scenarios. Feeder loading
increases progressively from Scenario 1 (52%) to Scenario 4 (93%). Scenario 3 and Scenario 4 indicate heavy
feeder loading, with Scenario 4 approaching critical operating limits, highlighting the need for feeder capacity
enhancement or smart EV charging strategies.
The simulation results clearly demonstrate that EV charging substations significantly influence the operational
performance of distribution networks. Increased EV penetration leads to voltage degradation, higher system
losses, and increased loading on transformers and feeders. While the system remains stable under moderate EV
adoption, high penetration with fast charging necessitates network reinforcement, advanced voltage control,
and proper capacity planning. The results validate the effectiveness of load flow analysis as a planning tool for
EV charging infrastructure. The datasets and tabulated results provide actionable insights for utilities to
determine optimal transformer sizing, feeder upgrades, and the integration of voltage support mechanisms.
Overall, the proposed design and simulation framework supports reliable and efficient deployment of EV
charging substations in future smart distribution networks.
CONCLUSION
This study presents the design and simulation of an EV charging substation integrated with a distribution
network, with emphasis on load flow and performance analysis under varying EV penetration levels. The
results demonstrate that while the system operates satisfactorily under low to moderate EV charging demand,
high penetration and fast-charging scenarios significantly impact voltage profiles, power losses, and
transformer and feeder loading. These findings highlight the necessity of proper substation planning, capacity
sizing, and voltage regulation strategies to ensure reliable and efficient operation of EV charging
infrastructure. Load flow analysis proved to be an effective tool for identifying critical operating limits and
potential network constraints. As a future scope, the proposed work can be extended by incorporating
coordinated and smart charging strategies, integration of renewable energy sources and energy storage
systems, harmonic and power quality analysis, and real-time control using smart grid technologies to further
enhance the resilience, sustainability, and scalability of EV charging substations.
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