中文摘要：

传统回馈电子负载回馈到电网时存在电流谐波大、功率因数低以及对电网产生污染等缺点,限制了它的推广应用。为了解决传统回馈电子负载的弊端,介绍一种新型的DC-AC（直流到交流）能量回馈电子负载,利用DC-DC（直流到直流）回馈的原理解决传统回馈电子负载对电网谐波污染大的问题,把无污染的电能回收再利用。系统由AC能量补给、逆变、拉载、升压以及上位机控制等部分组成。系统采用LabVIEW做上位机控制以及显示。通过对华为生产的PSU4850通信电源作为负载的实验测试表明设计是成功的。

英文摘要：

The traditional feedback electronic feedback load is confined in the widely application because when it is back fed to the power grid,there exists defects such as the big current harmonic wave,low power factor and pollution on the power grid.In order to solve the disadvantages of the traditional feedback electronic load,a new type of DC-AC（the direct current to the alternative current）energy feedback is introduced in this paper.It utilizes the DC-DC（the direct current to the direct current）theory to settle the problem that the traditional feedback electronic load contaminates harmonic wave of the power grid heavily and can reuse and recycle,free of any cont-amination,the electric energy.The system is com- posed of the AC power supply,the inverter,the tensile load,the boost,the PC control and other parts.The system applies the LabVIEW software in doing the PC control and the display.