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An Efficient Grid-Connected Three-Phase Single-Stage Boost Current Source Inverter

机译:高效的网格连接的三相单级升压电流源逆变器

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摘要

The proposed three-phase boost Current Source Inverter (CSI) is equipped with Reverse-Blocking IGBTs (RB-IGBT) and the Phasor Pulse Width Modulation (PPWM) switching pattern to provide system efficiency greater than 92% and high boost ratios (VLL/Vdc) up to 3.5 in a single stage. The boost CSI results in elimination of dc-dc boost converter or a step-up transformer needed in dc-ac converters operating with a dc input voltage lower than the output line-to-line voltage. In this paper, the relationship between the fundamental component of the inverter output current and the PPWM modulation index is derived and then confirmed by simulation and experimentally obtained data in both stand-alone and grid-tied modes of operation. In this work, a 2 kW, 208 VLLrms, 60 - 120 Vdc RB-IGBT-based boost CSI is prototyped to explore capabilities of the grid-tied boost CSI in terms of efficiency and THD for various input dc voltage and output power levels.
机译:所提出的三相升压电流源逆变器(CSI)配备了反向阻断IGBT(RB-IGBT)和Phasor脉冲宽度调制(PPWM)切换模式,以提供大于92%和高升压比率的系统效率(V ll / V. dc )单一阶段高达3.5。升压CSI导致消除DC-AC转换器所需的DC-DC升压转换器或使用DC输入电压低于输出线到线电压的DC-AC转换器所需的升压变压器。在本文中,导出了逆变器输出电流的基本分量与PPWM调制指数之间的关系,然后通过模拟和实验获得的数据以独立和网格连接的操作模式进行了确认。在这项工作中,2 kW,208 v llrms ,60 - 120 v dc 基于RB-IGBT的增强CSI被伪装,以探索各种输入直流电压和输出功率水平的效率和THD的电网系升压CSI的能力。

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