基于双PWM变换器的三相能馈型交流电子负载研究  

Study of Three-Phase AC Electronic Load with Energy-Feedback Based on Dual PWM Converter

作　　者：许立洋 方益民 刘亚慧 XU Liyang;FANG Yimin;LIU Yahui(Institute of Electrical Engineering and Intelligent Equipment,Jiangnan University,Wuxi 214122)

机构地区：[1]江南大学电气工程与智能装备研究所,无锡214122

出　　处：《计算机与数字工程》2020年第10期2512-2518,共7页Computer & Digital Engineering

基　　金：国家重点研发计划“食品工程化与智能化加工新技术装备开发研究”(编号:2016YFD0400301)资助。

摘　　要：为了改善传统负载和能耗型电子负载存在的电能浪费和使用不便等问题,研究了一种基于双PWM变换器的三相能馈型交流电子负载。首先,分析了其主电路和系统的工作原理。其次,分别设计了两级PWM变换器的控制策略和调制策略,并且针对于其直流部分的电压和谐波进行了分析,设计了相应的基于LMS算法的自适应陷波器对直流侧谐波进行滤波。最后,通过Matlab/Simulink搭建整个交流电子负载系统进行仿真,仿真结果表明系统控制策略正确,自适应陷波器降低了直流母线电压的谐波含量,提高了并网电流质量。In order to improve the traditional load and energy consumption electronic load of energy waste and inconvenient problems,a three-phase AC electronic load with energy-feedback based on dual PWM converter is researched.Firstly,the main circuit and working principle of three-phase AC electronic load with energy-feedback are analyzed.Secondly,the control strategy and modulation strategy of dual PWM converter are designed respectively and then the DC side voltage and harmonic is calculated,an adaptive notch filter based on LMS algorithm is designed for filtering the harmonic at the DC side.Finally,a simulation is made in Matlab/Simulink and it proves that the control strategy of the system is correct,the adaptive notch filter reduces the harmonic content of DC voltage and improves the quality of grid-connected current.

关 键 词：交流电子负载 负载特性模拟 并网变换器 自适应陷波器 PWM变换器 能量回馈 

分 类 号：TM571[电气工程—电器]