光伏并网逆变器辅助电源设计  

Design of Auxiliary Power Supply for Grid-connected Photovoltaic Inverter

作　　者：易振华[1] 孙以泽[1] 彭乐乐[1] 陈晓[1] 

机构地区：[1]东华大学机械工程学院,上海201620

出　　处：《水电能源科学》2012年第8期214-218,共5页Water Resources and Power

基　　金：中央高校基本科研业务费专项资金资助重点项目(11D10301);金太阳示范工程基金资助项目(用户侧并网发电项目第47项)

摘　　要：太阳能是清洁安全可靠的可再生能源,采用光伏并网技术的太阳能发电已成为应用面最广的光伏新能源应用技术。基于电流型PWM控制芯片UCC2801设计了一种光伏并网逆变器用辅助电源,采用4路输出的单端反激式拓扑,由光伏并网逆变器的直流母线供电,并采用电压基准源及光耦实现隔离反馈。试验结果表明,该辅助电源输入电压范围宽、输出纹波小、交叉负载调整率低,还能防止反复启停及在电源启动后自动关断。Solar energy is a kind of clean, safe, reliable and renewable energy. Solar energy generation with grid-connected photovoltaic technology has become wide utilization in photovoltaic new energy technology. Based on the current- type PWM control chip UCC2801, an auxiliary power supply （APS） of grid-connected photovoltaic inverter is designed. The APS adopts topological structure of four-output single-ended flyhack and power is supplied by DC bus of the inverter. Voltage reference point and optical coupling are used to realize the I/O isolation and feedback. The test results show that the APS has advantages of wide scope of input voltage, low DC output voltage ripple and cross-load regulation ratio, which can avoid repeated start-stop and auto-shutdown after power source startup.

关 键 词：光伏并网逆变器 启动电路 反复启停 自动关断 辅助电源 UCC2801 反激变压器 

分 类 号：TM615[电气工程—电力系统及自动化] TM910.2