具有分压电容平衡功能的新型组合九电平逆变器

发布时间：2018-05-10 05:15

本文选题：分压电容平衡 + 混合H桥拓扑　；参考：《电工技术学报》2017年S1期

【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。
[Abstract]:Aiming at the problems of traditional multilevel inverter, such as the voltage number is more than 3, the voltage divider capacitance is difficult to balance, and the topology circuit structure is complex, the hybrid H-bridge topology and the independent voltage capacitor balance topology circuit of extended NP point are combined. A novel nine-level inverter topology circuit is simplified and a four-carrier stacked SPWM strategy is proposed for the topology circuit. Through the simulation analysis, the voltage amplitude of the two voltage dividers in the middle of the hybrid H-bridge topology with extended NP points fluctuates up and down at the reference voltage 0V, and the amplitude reaches 卤25V, while the voltage value of the new nine-level inverter fluctuates at the expected value of 100V. The fluctuation amplitude is less than 卤5V. Therefore, the simulation results show that the application of the topology and modulation strategy of the novel nine-level inverter can not only reduce the amplitude of the output voltage ripple, but also achieve the effect of the equalization of the partial voltage capacitance. The application of two switches is reduced and the economic cost is reduced.
【作者单位】：西华大学电气与电子信息学院;流体及动力机械教育部重点实验室(西华大学);
【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
【分类号】：TM464

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