基于双PWM变换器的能馈型交流电子负载研究  

Study on energy-feedback AC electronic load based on dual PWM converter

作　　者：王洪希[1] 鲁长贺 田伟[1] 

机构地区：[1]北华大学电气信息工程学院,吉林吉林132021

出　　处：《现代电子技术》2018年第2期56-59,共4页Modern Electronics Technique

基　　金：吉林省科技发展计划项目(20150519023JH);吉林省教育厅科学技术研究项目(2012153)~~

摘　　要：为了替代传统负载和能耗型电子负载,研究一种基于双PWM变换器的能量回馈型交流电子负载。主电路采用双PWM变换器构成背靠背系统的拓扑结构,负载模拟变换器采用滞环的电流单闭环控制策略,并网变换器采用直流电压外环和电网侧交流电流内环的双环闭控制策略。通过Matlab/Simulink仿真试验,证明了该方案可以实现对负载模拟侧电流精确控制,模拟所需负载特性的功能,同时将测试电能回馈电网,并网逆变侧功率因数接近于1。仿真结果表明该方案可行且有效。To replace the traditional load and energy consumption electronic load,an energy-feedback AC electronic load based on dual PWM converter is researched. The dual PWM converter is adopted in the main circuit to constitute the topological structure of back-to-back system. The hysteresis current single close-loop control strategy is adopted for load simulation converter. The double close-loop control strategy of DC voltage outer loop and alternating current inner loop in the grid side is adopted for grid-connected inverter. The Matlab/Simulink simulation experiment proves that the scheme can realize precise control of the current in the load simulation side,simulate the function of the required load characteristic,and return the tested power energy to the grid with power factor close to 1 in the grid-connected inverter side. The simulation results show that the scheme is feasible and effective.

关 键 词：双PWM变换器 负载特性模拟 能量回馈 交流电子负载 滞环控制 双环控制 

分 类 号：TM46[电气工程—电器]