Three-Phase Line-Interactive Dynamic Voltage Restorer with a New Sag Detection Algorithm


Vol. 10, No. 2, pp. 203-209, Mar. 2010
10.6113/JPE.2010.10.2.203


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 Abstract

This paper describes the development of a three-phase line-interactive DVR with a new sag detection algorithm. The developed detection algorithm has a hybrid structure composed of an instantaneous detector and RMS-variation detectors. The source voltage passes through the sliding-window DFT and RMS calculator, and the instantaneous sag detector. If an instantaneous sag is detected, the RMS variation detector-1 is selected to calculate the RMS variation. The RMS variation detector-2 is selected when the instantaneous sag occurs under the operation of the RMS variation detector-1. The feasibility of the proposed algorithm is verified through computer simulations and experimental work with a prototype of a line-interactive DVR with a 3kVA rating. The line-interactive DVR with the proposed algorithm can compensate for an input voltage sag or an interruption within a 2ms delay. The developed DVR can effectively compensate for a voltage sag or interruption in sensitive loads, such as computers, communications equipment, and automation equipment.


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Cite this article

[IEEE Style]

J. Jeong, J. Lee, B. Han, "Three-Phase Line-Interactive Dynamic Voltage Restorer with a New Sag Detection Algorithm," Journal of Power Electronics, vol. 10, no. 2, pp. 203-209, 2010. DOI: 10.6113/JPE.2010.10.2.203.

[ACM Style]

Jong-Kyou Jeong, Ji-Heon Lee, and Byung-Moon Han. 2010. Three-Phase Line-Interactive Dynamic Voltage Restorer with a New Sag Detection Algorithm. Journal of Power Electronics, 10, 2, (2010), 203-209. DOI: 10.6113/JPE.2010.10.2.203.