西华大学学报（自然科学版）2017，Vol.36Issue(1)：24-28,5.DOI:10.3969/j.issn.1673-159X.2017.01.005
一种新型光伏串联型微型变换器
A New Type of Photovoltaic Series Micro Converter
摘要
Abstract
Generally, a centralized photovoltaic power converter is unable to track the maximum power of local module. This re-sults the low output efficiency. Thus, a new series micro converter type is put forward in this paper. The DC bus of micro inverter is in series in this topology structure, and the maximum power of photovoltaic module is tracked by each independent micro-inverter. In this way, the overall efficiency of the system output can be effectively improved. An improved network-side control algorithm is studied, and the quasi-PR control and the repeat control technology is chosen for the control of voltage loop and current loop in this algorithm. The impact of the grid frequency fluctuation can be effectively suppressed, and the accuracy is improved. With MATLAB / Simulink tool, a simulation model of tandem type micro converter and centralized converter were built, and the relevant simulation was pro-gressed. The results indicate that the improved control algorithm can be used to achieve good control effect, compared to series micro-converter, the centralized inverter has more stable output power and higher conversion efficiency.关键词
光伏/串联/微型变换器/重复控制/准PR控制Key words
photovoltaic/series/micro-inverter/repeat control/quasi-PR control分类
信息技术与安全科学引用本文复制引用
徐琳,王军,林瑞星,孙章,青禹成,胡鹏飞..一种新型光伏串联型微型变换器[J].西华大学学报（自然科学版）,2017,36(1):24-28,5.基金项目
光伏电站逆变器特性对配电网继电保护的影响研究(521997160008) （521997160008）
四川省科技厅项目多种新能源发电与应用科普互动展示平台研制(2017KZ0020) （2017KZ0020）
四川省科技创新苗子工程(2016111). （2016111）
