Topological Design and Modulation Strategy for Buck-Boost Three-Level Inverters
Topological Design and Modulation Strategy for Buck-Boost Three-Level Inverters
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Buck-Boost三电平逆变器的拓扑设计与调制策略
DOI：
10.1109/tpel.2008.2011784
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发表时间：
2009
期刊：
影响因子：
--
通讯作者：
D. Vilathgamuwa
中科院分区：
文献类型：
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作者：
F. Gao;P. Loh;R. Teodorescu;F. Blaabjerg;D. Vilathgamuwa
迄今为止，具有降压和升压功能的 DC-AC 逆变设计拓扑主要集中在两电平电路上，而扩展到三电平的可能性几乎尚未探索。为了对该领域的研究做出贡献，本文提出了许多可行的降压-升压三电平逆变器的设计，这些逆变器也可以支持双向功率转换。所提出的前端电路是从Cuk衍生的降压-升压两电平逆变器开发的，通过使用“交替反相配置”（APOD）调制方案，降压-升压三电平逆变器可以通过简单地控制位于电路设计升压部分的有源开关来执行不同的五电平线电压和三电平相电压切换。作为一种节省成本的选择，通过简单地重新路由其余开关的选通命令，可以进一步从电路的升压部分中去除一个有源开关，而不影响交流输出电压幅度。为了验证所提出的逆变器的有效性，在实验室原型用于实验测试之前进行了 Matlab/PLECS 仿真。
To date, designed topologies for DC-AC inversion with both voltage-buck and boost capabilities are mainly focused on two-level circuitries with extensions to three-level possibilities left nearly unexplored. Contributing to this area of research, this paper presents the design of a number of viable buck-boost three-level inverters that can also support bidirectional power conversion. The proposed front-end circuitry is developed from the Cuk-derived buck-boost two-level inverter, and by using the "alternative phase opposition disposition" (APOD) modulation scheme, the buck-boost three-level inverters can perform distinct five-level line voltage and three-level phase voltage switching by simply controlling the active switches located in the designed voltage boost section of the circuits. As a cost saving option, one active switch can further be removed from the voltage-boost section of the circuits by simply re-routing the gating commands of the remaining switches without influencing the ac output voltage amplitude. To verify the validity of the proposed inverters, Matlab/PLECS simulations were performed before a laboratory prototype was implemented for experimental testing.