Scenario-based analysis of the impacts of electric vehicle charging stations on the distribution network

Abstract

This study conducts a scenario-based analysis of the impact of electric vehicle charging stations (EVCS) on a 47 MW urban distribution grid. Using DIgSILENT software, two loading scenarios with 5 and 25 EVCS were modeled on feeder A and feeder B. The scenarios were compared in terms of voltage profiles, power losses, and loading rates. In the second scenario, which features the highest loading, active power demand increased by 21%, and total losses rose by up to 31.8%. Several distribution transformers reached or exceeded their nominal capacities, and voltage drops approached regulatory limits. These findings highlight the necessity for infrastructure upgrades and capacity planning to ensure network reliability and efficiency. The study offers valuable insights and data-driven recommendations for planning EVCS integration in similarly structured distribution systems.

Keywords

• electric vehicle
• charging station
• distribution grid

Elektrikli araç şarj istasyonlarının dağıtım şebekesi üzerindeki etkilerinin senaryo tabanlı olarak analizi

Öz

Bu çalışma, 47 MW güç yoğunluğuna sahip bir şehir dağıtım şebekesinde elektrikli araç şarj istasyonlarının (EAŞİ) etkilerini senaryo tabanlı olarak analiz etmektedir. DIgSILENT yazılımı kullanılarak, fider A ve fider B üzerinde 5 ve 25 EAŞİ’lik iki farklı yükleme senaryosu modellenmiştir. Senaryolar, gerilim profilleri, güç kayıpları ve yüklenme oranları açısından karşılaştırılmıştır. En yüksek yüklenmenin olduğu ikinci senaryoda sistemin toplam aktif gücü %21 artmış, kayıplarda ise %31.8'e varan yükseliş gözlemlenmiştir. Bazı dağıtım transformatörleri nominal kapasitelerini aşarken, gerilim düşümleri sınır değerlere yaklaşmıştır. Bu durum, sistem güvenilirliği ve verimliliği açısından altyapı iyileştirme ve kapasite planlamasının önemini ortaya koymaktadır. Çalışma, benzer yapıya sahip şehir şebekeleri için teknik veri temelli planlamaya katkı sağlayacak öneriler sunmaktadır.

Anahtar Kelimeler

• elektrikli araç
• şarj istasyonu
• dağıtım şebekesi

Kaynakça

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