In a significant advancement for the energy sector, researchers at the Indian Institute of Technology Delhi have unveiled a groundbreaking photovoltaic system designed to enhance the reliability of electric vehicle (EV) charging stations amidst the challenges posed by non-ideal grid conditions. This innovative approach, detailed in the article published in ‘e-Prime: Advances in Electrical Engineering, Electronics and Energy’, leverages solar power generation to deliver consistent energy to both plug-in electric vehicle (PEV) infrastructure and local loads.
The research, led by Kripa Tiwari, addresses a pressing concern in the integration of renewable energy sources (RES) into existing power grids: the inherent intermittency and dynamic behavior of solar energy. “Our system ensures that even during fluctuating grid conditions, local loads receive uninterrupted power, while simultaneously providing a seamless charging experience for electric vehicles,” Tiwari stated. This dual functionality not only enhances the reliability of energy supply but also contributes to the broader adoption of PEVs, which is increasingly critical as cities strive to reduce carbon emissions.
At the core of this photovoltaic system is a voltage source inverter that connects the solar array to an AC common bus. This setup allows for effective power management, enabling the system to provide reactive power and harmonic support. To tackle power quality issues that often arise with RES, the researchers implemented an integrator-based frequency locked loop control strategy. This innovative approach regulates voltage levels and corrects power factor discrepancies, ensuring that the system operates within the stringent limits set by industry standards.
The performance of this system was rigorously tested using a hardware prototype, with results showing total harmonic distortion (THD) for grid currents and voltages measured at 2.36% and 3.60%, respectively—both figures well within the thresholds established by the IEEE 519 standard. “This compliance not only demonstrates the effectiveness of our design but also sets a benchmark for future developments in the field,” Tiwari remarked.
The potential commercial impacts of this research are vast. As cities and businesses increasingly invest in EV infrastructure, reliable and efficient power management systems will be crucial. By ensuring that charging stations can operate effectively even during grid anomalies, this technology could pave the way for more widespread adoption of electric vehicles, ultimately contributing to sustainability goals.
As the energy landscape continues to evolve, Tiwari’s work provides a promising glimpse into the future of renewable energy integration. The ability to manage power quality and ensure reliability in charging infrastructure may very well shape the next generation of energy solutions.
For more insights into this transformative research, you can visit the Department of Electrical Engineering at IIT Delhi.