CAJ | 학술논문

vienna 拓扑整流器具有低开关损耗、三电平电压波形等优点,适于提高系统功率密度.为进一步提高功率密度,将LCL 滤波器引入到三相 vienna 拓扑整流器前端,分析了不同电流反馈下,系统控制系统数字延时对系统稳定性的影响.基于vienna整流器相比普通三相整流器能工作于更高的开关频率的特点,提出利用DSP固有的数字控制的延时特性,在保持一定开关纹波衰减的情况下,合理设计LCL滤波器谐振频率,达到保持系统稳定和减小滤波器体积的目的.最后通过仿真和实验验证了理论推导和分析的合理性.
vienna 탁복정류기구유저개관손모、삼전평전압파형등우점,괄우제고계통공솔밀도.위진일보제고공솔밀도,장LCL 려파기인입도삼상 vienna 탁복정류기전단,분석료불동전류반궤하,계통공제계통수자연시대계통은정성적영향.기우vienna정류기상비보통삼상정류기능공작우경고적개관빈솔적특점,제출이용DSP고유적수자공제적연시특성,재보지일정개관문파쇠감적정황하,합리설계LCL려파기해진빈솔,체도보지계통은정화감소려파기체적적목적.최후통과방진화실험험증료이론추도화분석적합이성.
Vienna topology rectifier has the advantages of low switching losses as well as three-level voltage waveform which helps to improve the system power density. A LCL-filter-based three-phase vienna topology rectifier is introduced to further improve the system power density and an analysis is given about the effect of control system digital delay on the system stability under different current feedback. As the vienna topology rectifier can operate on higher switching frequencies compared to traditional three-phase rectifier, a method of designing the LCL filter resonance frequency is presented taking advantages of the DSP digital delay to maintain system stability and reduce the volume of the filter under a certain switching ripple attenuation. The experiments and simulations verify the theoretical derivation and analysis finally. This work is supported by National Natural Science Foundation of China (No. J20111136).