Evaluation of the ev fast charging stations performance during operation

RELEVANCE. The development of charging infrastructure, both quantitatively and qualitatively, is an essential condition for the further expansion of promising low-carbon vehicles. In this regard, the design of power supply system’s taking into account the characteristics and operating modes of fast charging stations (CS), their energy efficiency and technical operation are becoming increasingly important. THE PURPOSE - to experimentally evaluate the characteristics of manufactured in Russia CS under real-life operating. To implement charging sessions of passenger electric vehicles (EV) and plug-in hybrid electric vehicles (PHEV) common in the Russian Federation via the measurement and recording of the CS input and output parameters. To experimentally evaluate the CS energy efficiency its relationship with of the charged EV characteristics. METHODS. The objectives were achieved through the organization of four Russian manufactured multi-port CS trial operation and using ten popular EV models. During the trial operation, standard charge procedures were performed, the input AC and output DC characteristics of the CS are measured. Charging station performance was recorded throughout the entire charging session using both external measuring instruments and the built-in capabilities of the CS themselves. RESULTS. Time dependences of the CS input and output power, charging current and voltage, state of charge, and energy were obtained while charging EV battery from minimum to maximum state of charge (SOC). The measurement results allowed us to quantify the CS energy efficiency and establish the relationship between CS efficiency, charging power, and the initial battery SOC. Charging profiles reflecting the characteristics and nature of charging power changes during the energy replenishment process were obtained for popular mass-produced EV and PHEV in Russia. CONCLUSION. The results presented in this article are of practical interest for charging stations operating modes and characteristics analysis and can be useful in modeling and designing charging infrastructure facilities, forecasting and managing electricity consumption.

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