具有分压电容平衡功能的新型组合九电平逆变器  

A New Simplificated Combination Nine Level Inverter with the Function Balancing Partial Voltage Capacitances

作　　者：甘雪[1] 曹太强[1,2] 林玉婷[1] 刘威[1] Gan Xue;Cao Taiqiang;Lin Yuting;Liu Wei(School of Electrical and Electronic Information,Xihua University,Chengdu,610039,China;Key Laboratory of Fluid and Power Machinery Ministry of Education,Xihua University,Chengdu,610039,China)

机构地区：[1]西华大学电气与电子信息学院,成都610039 [2]流体及动力机械教育部重点实验室(西华大学),成都610039

出　　处：《电工技术学报》2017年第A01期196-202,共7页Transactions of China Electrotechnical Society

基　　金：西华大学研究生创新基金研究项目(ycjj2016062);太阳能技术集成及应用推广四川省高校重点实验室项目(TYN2015-09);流体及动力机械教育部重点实验室研究基金(西华大学);攀枝花市科技计划项目-太阳能光伏离/并网智能化控制逆变一体集成应用(2014CY-S-1-2);攀枝花市科技计划项目-光伏发电系统关键技术研制(2015 CY-C-5);四川省电力电子节能技术与装备重点实验室项目(新型高效无桥高功率因数变换器的研究-szjj2015-066)资助

摘　　要：针对传统多电平逆变器存在电平数大于3时,分压电容难以平衡,造成拓扑电路结构复杂等问题,对扩展NP点的混合H桥拓扑和独立分压电容平衡拓扑电路进行组合,简化并得到一种新型九电平逆变器拓扑电路;针对该拓扑电路提出相应的四载波层叠SPWM策略。通过仿真分析,扩展NP点的混合H桥拓扑中间两个分压电容电压值幅度在基准电压0V上下波动,其幅度达到±25V;而新型九电平逆变器的分压电容电压值在期望值100V上下波动时,其波动幅值小于±5V,因此,从仿真结果表明新型九电平逆变器拓扑结构及调制策略的应用,不仅可降低输出电压纹波的幅值,还能达到分压电容均衡的效果,并减少了两个开关管的应用,降低经济成本。Conventional multilevel inverter has the problems that partial pressure capacitance isdifficult to balance and its structure becomes complex when number of electrical level are more thanthree time,this paper simplified combined topology consisted of the extension of NP mixed H bridgetopology and balanced topology of independent partial pressure capacity combined topology firstly,andsimplified,a new of nine levels inverter topology is got,then proposed a four carrier SPWMmodulation strategy suitable for the topology.Finally the simulation analysis shows that extension ofNP mixed H bridge topology among two partial pressure capacitor voltage amplitude at0V referencevoltage fluctuate,its amplitude to±25V.Partial pressure of new nine level inverter capacitor voltagevalue fluctuates up and down in expectation of100V,fluctuation amplitude is less than+5V.Simulationresults show that the new nine levels inverter topologies and modulation strategies applied,not onlyreduce the amplitude of the output voltage ripple,to achieve the effect of equilibrium points ahcapacitance,also reduced the application of two switch tube,reduce the economic costs.

关 键 词：分压电容平衡 混合H桥拓扑 九电平逆变器 四载波层叠 

分 类 号：TM464[电气工程—电器]