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http://dx.doi.org/10.5207/JIEIE.2002.16.5.022

A Study on Over Current Protection Method of Unified Power Quality Conditioners  

이우철 (한경대학교 전기공학과)
김한정 (한경대학교 제어계측공학과)
Publication Information
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers / v.16, no.5, 2002 , pp. 22-28 More about this Journal
Abstract
A protection scheme for Unified Power Quality Conditioner (UPQC) is presented and analyzed in this paper. The proposed UPQC has the series active power filter operated as a high impedance k($\Omega$) to the fundamentals when the over current occurs in the power distribution system, and three control strategies are proposed in this paper. The first is the method by detecting the fundamental source current through the p-q theory,［1］ the second is the method by detecting the fundamental component of load current in Synchronous Reference Frame(SRF) and the third is the method by detecting the input voltage. When the over current occurs in the power distribution system, the proposed scheme protects the UPQC without additional protection circuits. The validity of proposed protection scheme is investigated through simulation results.
Keywords
UPQC(Unified Power Quality Conditioner); p-q theory; SRF(Synchronous Reference Frame);
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