一种级联型多电平并网逆变器控制策略的研究  

Research on Control Strategy of a Cascade Multi-level Grid-connected Inverter

作　　者：龚秋英 马鑫金 李艳 GONG Qiuying;MA Xinjin;LI Yan(College of Electronical and Information Engineering,San Jiang University,Nanjing 210012,Jiangsu,China;College of Automation,Nanjing University of Science and Technology,Nanjing 210094,Jiangsu,China)

机构地区：[1]三江学院电子信息工程学院,江苏南京210012 [2]南京理工大学自动化学院,江苏南京210094

出　　处：《电气传动》2020年第11期13-16,共4页Electric Drive

基　　金：2014年江苏省高校自然科学研究面上项目(14KJD480004)。

摘　　要：针对传统的两电平逆变器功率小、效率低等问题,设计了级联型多电平并网逆变器。首先,对多电平逆变器进行了小信号模型建模;之后,分析了两种调制方式,通过比较选取了合适的载波移相调制法控制策略;最后,设计了1 kW的七电平光伏并网逆变器,通过搭建实验平台,验证了多电平逆变器的合理性。In view of the low power and low efficiency of the traditional two-level inverters,cascaded multilevel grid-connected inverter was designed.Firstly,the small-signal model of multi-level inverters was modeled.After that,two kinds of modulation methods were analyzed.Finally,an 1 kW seven-level photovoltaic gridconnected inverter was designed by selecting a suitable carrier phase-shift modulation control strategy.The rationality of the seven-level inverter was verified by setting up an experimental platform.

关 键 词：级联 小信号模型 载波移相 七电平 

分 类 号：TM464[电气工程—电器]