多端口能量路由器交流接口拓扑与参数设计方法研究

Research on AC Interface Topology and Parameter Design Method of Multi-port Energy Router

随着新能源发电技术、储能技术、电动汽车充电桩等技术的发展,电力系统的高效性、稳定性等方面受到影响。多端口能量路由器具有功率等级高、易于模块化扩展等优点,可增加新能源的消纳能力,提高电网电能质量。大功率的能量路由器其交流接口选择T型三电平变换器,具有谐波含量低,电能质量高的优点。本文在分析该拓扑的工作原理后,给出了LCL滤波器以及直流母线电容的设计方法。并根据100kW的额定功率的T型三电平变换器的性能指标要求给出了具体的参数。为验证该参数设计方法,搭建了仿真模型。仿真结果表明由该参数设计方法设计的T型三电平变换器能够输出较高质量的电能,谐波含量低。

With the development of new energy power generation technology,energy storage technology,electric vehicle charging pile and other technologies,the power system faces the problems of efficiency,stability etc.Multi-port energy routing has the advantages of high power level and easy modular expansion,which can increase the absorption capacity of new energy and improve the power quality of the grid.For the high power router,the AC interface chooses the T-type three-level converter,which has the advantages of low harmonic content and high power quality.After analyzing the working principle of this topology,the design method of LCL filter and DC bus capacitor was given,and the specific parameters were given according to the performance requirements of T-type three-level converter with rated power of 100 kW.To verify the parameter design method,a simulation model was built.The simulation results show that the T-type three-level converter designed by this parameter design method can output higher quality power with low harmonic content.