Journal
INTERNATIONAL TRANSACTIONS ON ELECTRICAL ENERGY SYSTEMS
Volume 31, Issue 12, Pages -Publisher
WILEY-HINDAWI
DOI: 10.1002/2050-7038.13248
Keywords
distribution network; voltage stability
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Recent advancements in EV battery technologies and government policies promoting EVs have led to a significant increase in the number of EVs on the road, altering the load profile of distribution systems. This paper addresses grid stability by determining the impact of EV charging stations on voltage profiles and proposes a novel algorithm to quantify voltage stability indices based on refueling and travel patterns of EVs in a region. Simulations and analysis were conducted on IEEE 69 and 118 bus distribution systems.
Recent advancements in the electric vehicle (EV) battery technologies and the promotion of EVs through government policies has seen a drastic rise in the number of EVs on the road. This leads to a change in the load profile of distribution systems by altering the peak demand intervals from what is being forecast without the consideration of EVs. This necessitates a quantitative approach for determining the load profile in a scenario where the number of EVs are high. This paper addresses the planning and operation problem from the perspective of grid stability by determining the load profile of electric vehicle charging stations (EVCS) and subsequently quantifying the impact of EVCS on the voltage profile of the distribution system. A coordinated charging strategy is used to determine the load profile of EVCS constrained by both grid-to-vehicle (G2V) and vehicle-to-grid (V2G) rulesets. voltage sensitivity factor (VSF) and Voltage Stability Index (VSI) were used to quantify the impact of the EVCS load profile on the distribution system. This work proposes a novel algorithm to determine the voltage stability indices given the refuel and travel patterns of EVs of a region. Simulations and analysis were performed on IEEE 69 and 118 bus distribution systems.
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