Electric car charging can get rid of long tail! Reporter learned from Tianjin Polytechnic University, the school presided over by Professor Yang Qingxin 'wind and solar hybrid smart grid based on electric vehicle wireless charging system' technology was officially passed the certification, the technology has made a A large number of innovative achievements with independent intellectual property rights, the main indicators reached the international advanced level, to fill a blank of the domestic electric car technology.The results have been formally applied in the State Grid Corporation of Jiangxi, Shanghai and Hebei provinces and cities.
According to reports, with the increase in the number of electric vehicles, large-scale electric vehicles random access charging grid operation will bring great uncertainty; the daily charge of a large amount of electricity aggravated the hair, lose, distribution pressure; Some charging methods have not fundamentally reduced the dependence on traditional fossil fuels and really realized energy saving and emission reduction. The use of a large number of power electronic devices in charging equipment also brings harmonic pollution to the power grid.
In response to these shortcomings, Professor Yang Qingxin's research team uses an integrated distributed power supply (photovoltaic, wind power, etc.), load, energy storage systems and control devices to form an independent microgrid to power electric vehicles. The intelligent microgrid technology and the wireless power transmission technology phase For the first time, a new mode of wireless charging for electric vehicles independent of grid operation is realized, avoiding current impact and harmonics on the power grid, as a "invisible wing" for electric vehicles and enhancing the charging flexibility of electric vehicles .
The research establishes a microgrid hierarchical control strategy model that considers the relationship between maximum power and load power of photovoltaic and wind power and realizes the adaptive regulation of the output voltage reference value following the change of vehicle battery charging parameters.The research team proposed a wireless charging tight- Strong coupling cooperation mode, integrated inductive coupling and near-field resonance wireless charging technology advantages, the coil offset compatibility increased by 30%, a substantial increase in wireless charging system overall energy efficiency indicators, effectively reducing the large-scale electric vehicle charging on the grid Of the threat, at the same time be able to consume new energy sources on the spot, the real 'zero emissions'.
