Electric Vehicle DC Charging Stations Design, Floating Solar Photovoltaics, and HVDC Power Transmission and Distribution
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Abstract
The purpose of this study is to evaluate a semi-urban area in India—Hassan, Karnataka, for its transition to electrified roadway transportation with electric vehicles (EVs) for all EV variants in light, medium, and heavy-duty. The potential of solar photovoltaics with floating provisions was applied to meet the power needs for electric vehicle charging stations. The untapped potential of HVDC power transmission and distribution was leveraged to increase the efficiency of the power system. A 545 MW floating solar photovoltaics (FPV) system was simulated using NREL SAM, which becomes suitable for meeting the annual energy demand from EVs in Hassan. Since DC power transmission and distribution were chosen, a new DC charging equipment concept with DC-DC buck converters was simulated in MATLAB Simulink. The absence of AC-DC conversion (rectification) in DC fast chargers, as proposed in this system, maintains consistent power at DC from generation to transmission and distribution, ultimately serving the EV charging loadsthrough a set of DC-DC converters throughout the proposed power system. The practices in sustainability for commercial buildings are enhanced with the proposition of including provisions for efficient EV chargers, as proposed in this paper.
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