Hye-Won Choi, Seong Yun Kim, and Kyo Beum Lee, "Circulating Current Reduction for Modular Inverters Using a Modified Five Level Space Vector Modulation," in Proc. ICEE Conf., 2022. > Paper

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International Conference Hye-Won Choi, Seong Yun Kim, and Kyo Beum Lee, "Circulating Current Reduction for Modular Inverters Using a Modified Five Level Space Vector Modulation," in Proc. ICEE Conf., 2022.

2022

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This paper proposes a circulating current reduction method for modular inverters using a modified five level space vector modulation. The modular 

inverters have been applied for a wide range of power applications and renewable energy systems such as photovoltaic generation, battery charger of electric vehicles, and energy storage systems. The modular inverters have the advantages of the convenient design and maintenance, and adjustable 

power rating by the number of modules. However, the circulating current occurs when each inverter has the different voltage reference by the 

inconsistent triangular carrier waves and filter sizes. The circulating current deteriorate s the performance and reliability of parallel systems. This paper 

analyzes the two parallel connected inverters as a single five level inverter for operating synchronous, proposes the circulating current reduction 

method for improving the efficiency of the parallel connected inverter. The circul ating current is reduced by selection of the modified switching 

sequences. The validity of the proposed control method is demonstrated by the simulation results.

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