New charging strategy integrates Electric Vehicles into the power grid without risking overloads
Research proposes a real-time pricing scheme and strategic placement of power units to reduce energy losses and boost monetary benefits
image: This flowchart illustrates the decision-making process of the smart charging system. It determines whether an electric vehicle should charge, discharge, or remain idle based on real-time pricing, battery State of Charge (SoC), and peak demand periods to ensure grid stability.
Credit: Image courtesy of Alexander Aguila Téllez et al. / Universidad Politécnica Salesiana.
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New smart charging strategy prevents power grid overload from electric vehicles
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CUENCA, Ecuador — As the world shifts toward electric mobility, the sudden demand for power to charge Electric Vehicles (EVs) poses a significant threat to existing electricity grids. Researchers at Universidad Politécnica Salesiana have developed a new coordinated charging scheme designed to integrate cars, trucks, and buses into the power system without risking blackouts or infrastructure damage.
The study, which addresses "range anxiety" and charging accessibility—two of the biggest barriers to EV adoption—proposes a sophisticated classification system. By categorizing vehicles based on their specific charging capacities and implementing a Real-Time Pricing (RTP) model in 20-minute blocks, the system balances demand throughout the day.
A Strategic Approach to Grid Stability A key innovation of this research is the use of the Voltage Stability Index (VSI). Instead of placing energy resources at random, the team identified the "strongest buses" or connection points in the system. This allows for a more stable exchange of energy when vehicles charge or discharge their batteries back into the grid.
Furthermore, the study analyzes the impact of Distributed Generation (DG) units. Unlike traditional methods where power units are installed before knowing where EVs will be located, this model calculates the optimal placement of energy units after identifying EV charging patterns.
Economic and Technical Success The researchers tested their model using the industry-standard IEEE-33 and 69 bus systems. The results demonstrated a significant reduction in power losses and a clear increase in monetary benefits compared to existing methods.
"By coordinating how and when different types of vehicles charge, we can transform EVs from a potential burden on the grid into a manageable and economically beneficial asset," the study suggests.
This breakthrough provides a roadmap for utility companies and urban planners to accelerate the transition to green transportation while maintaining a stable and profitable power infrastructure.