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Electric vehicle charging can now eliminate the long "tail" of grid instability. According to a report from Tianjin University of Technology, a groundbreaking technology called "Complementary Smart Wireless Grid Based on Scenery and Wind Power Smart Vehicle Charging System," led by Professor Yang Qingxin, has successfully passed expert evaluation. This innovative system, developed with full intellectual property rights, has reached international advanced standards in key performance indicators. It fills an important technical gap in China's electric vehicle industry and has already been officially implemented by the State Grid Corporation of China, as well as in Jiangxi, Shanghai, and Hebei provinces.
As the number of electric vehicles continues to grow, uncontrolled charging behavior poses significant challenges to power grid stability. The massive electricity demand for daily charging puts additional pressure on transmission and distribution networks. Some existing charging methods fail to reduce reliance on fossil fuels or achieve real energy savings and emission reductions. Moreover, the widespread use of power electronic devices in charging infrastructure introduces harmonic pollution into the grid.
To address these issues, Professor Yang Qingxin’s research team developed an integrated microgrid system that combines distributed power sources (such as solar and wind), load management, energy storage, and control devices. This system supplies power to electric vehicles independently, using smart microgrid and wireless energy transmission technologies. This new approach allows electric vehicles to be charged wirelessly without affecting the main power grid, effectively acting like "wings" that enhance the flexibility and efficiency of charging.
The study introduced a hierarchical control strategy for microgrids, taking into account the relationship between photovoltaic and wind power generation and load demand. It also enables adaptive voltage regulation based on changes in battery charging parameters. The team proposed a tightly coupled and efficient wireless charging mode, integrating inductive coupling and near-field resonant technologies. This improved coil misalignment compatibility by 30% and significantly boosted the overall energy efficiency of wireless charging systems.
By reducing the impact of large-scale EV charging on the grid and enabling local utilization of renewable energy, this system truly achieves "zero emissions." It marks a major step forward in making electric vehicle charging more sustainable, efficient, and grid-friendly.