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조현빈(Hyun-Bin Jo),박종범(Jong-Beom Park),안재범(Jae-Beom An),임승범(Seung-Beom Lim),류홍제(Hong-Je Ryoo) 한국조명·전기설비학회 2021 조명·전기설비학회논문지 Vol.35 No.8
The scale of renewable power generation facilities such as wind power and solar power generation is being enlarged. Due to the increased scale of renewable power generation facilities, the system stability has been significantly affected by the increased distributed power sources, and various countries such as Germany and the United States are enacting standards to prevent deterioration of system stability. In this paper, we analyze the LVRT (Low Voltage Ride Through) conditions and reactive current injection standards established by Germany and Korea Electric Power Corporation (KEPCO). And, the LVRT control algorithm is applied to the designed inverter, and the operation of the grid-connected inverter was confirmed through simulation based on the LVRT boundary. In addition, the injection characteristic algorithm1 of active and reactive current in LVRT situation was modeled, and the modeled algorithm was verified by checking the simulation performance.