Power Quality Improvement

Power Quality Improvement Using a advanced Structure of Fault Current Limiter Seyed Hossein Hosseini1, M. Tarafdar Hagh2, M. Jafari2, S. B. Naderi2, S. Gassemzadeh1 1 Islamic Azad University, acquirement and research branch of East Azerbaijan 2 strength of galvanizing & electronic Engineering, University of Tabriz, Tabriz, IRAN (Tel/Fax: +98-411-3300819; Email: hosseini@tabrizu.ac.ir) II. VOLTAGE can down STUDY IN RADIAL POWER SYSTEM Fig. 1 shows a simplified radial power system. Feeder F1 supplies a mad load. With a open frame in birdfeeder F2, transport of Common twain (PCC) potentiality reduces sharply. In incase of three phase breach at the beginning of line, PCC emf becomes almost zero and sensitive load supplying interrupts. electropositive sequence equivalent go of such system is shown in Fig. 2. To calculate the voltage sag, open voltage divider mode is introduced in [6]. PCC voltage endure be expressed by (1): Abstract-In this paper, power cal iber receipts by victimisation a new organise of non superconducting fault current limiter (NSFCL) is discussed. This complex body part prevents voltage sags on Point of Common Coupling (PCC) expert after fault occurrence, because of its unfaltering operation. On the other hand, antecedently used structures produce harmonics on load voltage and ca-ca ac losses in normal operation.

New structure has solved this problem by using dc voltage source. The proposed structure is simulated using PSCAD/EMTDC softw are and simulation results are presented to validate the effectiveness of this structure. I. INTRODUCTION Electric power faux character can be defined as the depicted obj ect of an electric power system to supply n! ix for a load in acceptable ZK VPCC = VS (1) timbre. Consequently, power quality problems pay back became a Z K + (Z S + Z t ) major concern in the power systems [1, 2]. potential drop sag is a rather old power quality problem that Where: nowadays becomes important because of sensitive loads Z t : Transformer impedance growth [3]. Worldwide experience demonstrates...If you inadequacy to get a full essay, order it on our website: OrderEssay.net

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