电能回馈直流电子负载的设计与实现  

Design and Realization of Energy Feedback Type DC Electronic Load

作　　者：陈强[1] 鞠文耀[1] 贾中璐[1] 

机构地区：[1]南京电子技术研究所,江苏南京210039

出　　处：《电力电子技术》2011年第7期108-110,共3页Power Electronics

摘　　要：介绍了电能回馈直流电子负载的原理,给出其拓扑结构。该结构由Boost变换电路、高频隔离电路及逆变并网电路组成。Boost变换电路利用电流型控制芯片UC3843实现控制,采用电压外环、电流内环的双闭环控制策略制;高频隔离电路的控制单元为SG3525;逆变并网电路采用电流型控制,逆变输出电流跟踪电网相位以保证较高的功率因数,采用LCL滤波器有效滤除谐波,保证较高的电能质量。在理论分析的基础上,研制出一台1 kVA样机,并进行了实验验证,对采用LC滤波器和LCL滤波器的实验波形进行了比较。The operating principle of energy feedback type DC electronic load is analyzed.The topological structure is given which includes Boost converter circuit,high frequence isolated circuit and inverse grid-connected circuit.The Boost converter is controlled by current mode control chip UC3843 and the control strategy of which is double closed- loop.The control cell of the high-frequency isolation circuit is SG3525.The current mode control is adopted in the in- verse grid-connected circuit,and the LCL filter is adopted to reduce harmonic wave.A 1 kVA prototype machine is manufactured, as well as experiment is performed.The experimental results of LC filter and LCL filter are compared.

关 键 词：电子负载 升压变换电路 高频隔离电路 逆变并网电路 

分 类 号：TM714[电气工程—电力系统及自动化]