Research On Key Technologies Of DC/DC Converter In Energy Router

With the widespread application of renewable energy represented by solar energy and wind energy,how to effectively improve the utilization rate of energy and coordinate the rational distribution of different energy sources to better achieve the energy revolution and energy transformation has become an urgent need in academia and industry.demand.Energy Internet was proposed in the context of such an era.Energy Energy Internet relies on electric energy routers to achieve efficient use of clean energy and multi-energy conversion.Electric energy routers support distributed generation,energy storage,controllable load plug and play,and have efficient energy flow efficiency and good electrical isolation.Collective device for power electronics interface.The dual active DC/DC converter is the key to improving the efficiency and stability of the energy router.Compared with traditional power distribution equipment,the dual active DC/DC converter has good soft switching characteristics,high power density,and adjustable Power factor,high degree of freedom,electrical isolation and two-way transfer of energy,etc.,have attracted widespread attention in the industry,and have become a common topology for power transmission of energy routers.At present,the phase shift control to reduce the return power of the converter and the soft switching technology to reduce the switching loss are the key points of the research on the dual active bridge DC converter.thissis analyzes the working principle of dual active bridge DC-DC converters under energy routers for two different control modes of SPS and EPS.Taking the switching mode of the converter under extended phase shift control as an example,the extended phase shift control mode is derived The circuit equation of the specific working mode of the DC converter during the steady-state operation;secondly,the mathematical model for achieving complete soft switching is established,and the hardware and software conditions for achieving complete soft switching on the primary and secondary sides of the converter are obtained;The soft switching characteristics of single phase shift,extended phase shift control and double phase shift are studied,and the soft switching range of the first two at full power is given.Thirdly,the overall performance of the extended phase-shifted control converter is further analyzed,and the different switching modes of the extended phase-shifted control converter,as well as the corresponding soft switching capability and power transmission range under each type of switching mode,are given.Fully understand the different occasions where the extended phaseshift control converter is suitable.Finally,using the soft switch design parameters given in this paper to build a prototype,combined with simulation,the efficiency,current and other performance indicators of the converter are compared in different ways to verify the correctness of the theory proposed in this paper.