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http://dx.doi.org/10.13067/JKIECS.2021.16.2.261

A Study on LCL Filter Design and EMTP-RV Simulation for Grid-connected Three Phase Inverter  

Ko, Yun-Seok (Dept. of Electronic Engineering, Namseoul University)
Publication Information
The Journal of the Korea institute of electronic communication sciences / v.16, no.2, 2021 , pp. 261-270 More about this Journal
Abstract
In this study, the design methodology of LCL filter for grid-connected three-phase inverter was studied. First, the advantages and disadvantages of applying typical filter structures as a filter for grid connection of a three-phase inverter were analyzed. Next, filter design methodologies for grid connection of a three-phase inverter were analyzed, and an effective filter design methodology was determined to satisfy the harmonic requirements in grid connection. In order to verify the effectiveness of the design methodology, EMTP models such as a three-phase inverter, a three-phase LCL filter, and a performance evaluation system to evaluate the performance of the designed filter were developed using EMTP-RV. Next, an LCL filter was designed for an application example of a three-phase inverter, and the waveforms of the output voltage and outage current of the three-phase inverter were checked through EMTP-RV simulation work. In particular, the validity of the design methodology was verified by confirming that the magnitude of the current ripple was reduced to a limited magnitude through waveform analysis of the output current.
Keywords
Distributed Generation; Grid-connected Three-phase Inverter; Three-phase LCL Filter;
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