Switching cell structured direct AC–AC converter‑based three‑phase DVR system using interphase voltage

Hyeongmin Lee; Sanghun Kim; Honnyong Cha; Heung-Geun Kim

Switching cell structured direct AC–AC converter‑based three‑phase DVR system using interphase voltage

Vol. 21, No. 7, pp. 1041-1051, Jul. 2021

10.1007/s43236-021-00254-4

Dynamic voltage restorer

Voltage sag

Switching cell

Direct AC–AC converter

Interphase

Power quality

Abstract

This paper presents a dynamic voltage restorer to solve the voltage sag problem that causes the most serious economic loss among various grid accidents. The proposed method, which uses a direct AC–AC converter, consists of a simple controller unlike methods using a voltage source inverter that is controlled using complex operations. Unlike the energy storage type, there is no additional energy storage device, which reduces system cost. In addition, unlike the back-to-back type, energy conversion loss is reduced by one stage conversion. A switching cell-structured direct AC–AC converter that solves the rectification problem without a separate sensor is a reliable structure that reduces the volumes of the passive filters by increasing the switching frequency. In addition, using interphase voltages, it can take a wide range of voltage compensations to compensate for most of the voltage sag in various situations. In this paper, the background of the study is revealed and the operating principles and control schemes of the proposed system are analyzed. Then, the validity of this study is confirmed through simulation and experiment results.

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Cite this article

[IEEE Style]

H. Lee, S. Kim, H. Cha, H. Kim, "Switching cell structured direct AC–AC converter‑based three‑phase DVR system using interphase voltage," Journal of Power Electronics, vol. 21, no. 7, pp. 1041-1051, 2021. DOI: 10.1007/s43236-021-00254-4.

[ACM Style]

Hyeongmin Lee, Sanghun Kim, Honnyong Cha, and Heung-Geun Kim. 2021. Switching cell structured direct AC–AC converter‑based three‑phase DVR system using interphase voltage. Journal of Power Electronics, 21, 7, (2021), 1041-1051. DOI: 10.1007/s43236-021-00254-4.