薛家祥*， 张坤， 张天夏
（ 华南理工大学机械与汽车工程学院，广东广州，510640； ）
摘要： 随着大功率逆变器并联均流技术的发展，对于提高UPS离网光伏发电系统的容量和系统的可靠性提供了新的解决方案。本文UPS光伏逆变器系统是光伏离网发电系统+电池组+逆变器的供电方式，采用市电和太阳能为UPS供电的双充电模式，并且运用双MCU分别对蓄电池充电过程和主电路的交流逆变过程进行控制，双向SPWM逆变整流控制技术实现直流电能和交流电能的双向流动，设计了基于电压下垂特性的并联控制电路。通过实验表明系统的并联提升了光伏逆变系统的容量，双充电模式下UPS为负载的正常工作提供了保障。
关键词： 离网光伏发电；双向变换器；UPS；并联均流
Xue Jiaxiang*， zhangkun， Zhang Tianxia
（ South China University of Technology, School of Mechanical and Automotive engineering, Guangzhou 510640, China； ）
Abstract： Along with the development of parallel current sharing technology of high power inverter, it provides a new solution to improve the capacity and reliability of UPS(Uninterruptible Power System) Off_grid PV(photovoltaic) power generation system. This paper UPS photovoltaic inverter system is consisted of photovoltaic off grid power generation system, battery group and inverter power supply. The system works in double charge mode, which can be charged by commercial power or solar energy. It also works in double MCU mode, one is used to control the battery charging process and the other controls the main circuit of AC inverter process. The bidirectional SPWM inverse transformer rectifier can control the process of DC and AC power bidirectional flowing. This paper designs the parallel controlling circuit based on voltage droop characteristic. The experiment shows that the system has the capacity of the PV inverter system, and the UPS provides the guarantee for the normal operation of the load.
Keywords： Off_ grid photovoltaic power generation; Bidirectional converter; UPS; Parallel flow
作者简介： 薛家祥（1962—），男，教授，博士生导师，主要研究方向：光伏新能源、数字化焊接。
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