2001•IEEJ Transactions on Industry ApplicationsOpen access

Voltage Sag Compensation with Minimum Energy Injection by Use of a Micro-SMES

Sompob Polmai, Toshifumi Ise, Sadatoshi Kumagai

Abstract

This paper presents a method to compensate voltage sags with minimum energy injection for a series connected voltage restorer using a micro-SMES. A circuit for extracting the fundamental symmetrical components from sag voltages and a minimum energy injection algorithm is described. Simulations of voltage sag compensation have been carried out using PSCAD/EMTDC for various types of fault. The simulation results confirm the validity of the proposed method and show the possibility to reduce the size of energy storage device.

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Key concepts: Voltage sag, Compensation (psychology), Voltage, Energy (signal processing), Fault (geology), Energy storage, Control theory (sociology), Electronic engineering