Kyeong-Hwa Kim

Apr 12, 2024 | mdpi.com | Sung-Dong Kim |Thuy Tran |Seung-Jin Yoon |Kyeong-Hwa Kim

1. IntroductionThe growing global energy demand results in the energy transition, which increases the percentage of renewable energy sources (RESs) in the total energy generation. Solar and wind energy sources are mostly used around the globe thanks to their accessibility, affordability, and the fast development of power electronics to effectively integrate RES power into the utility grid [1].

Mar 6, 2024 | mdpi.com | Yubin Kim |Thuy Tran |Kyeong-Hwa Kim |Thúy Vi

1. IntroductionNowadays, grid-connected inverters (GCIs) are being increasingly developed to facilitate renewable energy generation systems, microgrid or smart grids [1,2]. The GCI systems should operate to effectively transfer the direct current (DC) power from distributed generators to alternative current (AC) power to inject it into the grid even under harsh unexpected grid conditions [3,4].

Jan 3, 2024 | preprints.org | Yubin Kim |Thuy Tran |Kyeong-Hwa Kim

Preprint Article Version 1 This version is not peer-reviewed Version 1 : Received: 2 January 2024 / Approved: 3 January 2024 / Online: 3 January 2024 (10:04:36 CET) Kim, Y.; Tran, T.V.; Kim, K. Robust EMPC-Based Frequency Adaptive Grid Voltage Sensorless Control for an LCL-Filtered Grid-Connected Inverter. Preprints 2024, 2024010117. https://doi.org/10.20944/preprints202401.0117.v1 Kim, Y.; Tran, T.V.; Kim, K.

Dec 13, 2023 | ieeexplore.ieee.org | Thuy Tran |Kyeong-Hwa Kim

The interfacing inverter plays a critical role in the distributed generation (DG) unit to deliver the electric power from renewable energy sources (RESs) to the main grid. The DG system efficiency is most dependent on the reliable operation of the controlled inverters in view of stable inverter output currents even under abnormal grid conditions. To obtain the high-quality injected currents which comply with the stringent standard such as the IEEE 1547 Std.