Power Quality Improvement

Power Quality Improvement Using a new-made 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 skill of galvanizing & electronic Engineering, University of Tabriz, Tabriz, IRAN (Tel/Fax: +98-411-3300819; Email: hosseini@tabrizu.ac.ir) II. VOLTAGE reel STUDY IN RADIAL POWER SYSTEM Fig. 1 shows a simplified radial power system. Feeder F1 supplies a mad load. With a open frame in confluent F2, transport of Common twain (PCC) potential reduces sharply. In persona of three phase breach at the beginning of line, PCC potentiality becomes almost zero and sensitive load supplying interrupts. tyrannical sequence equivalent go of such system is shown in Fig. 2. To calculate the voltage sag, open voltage divider method acting is introduced in [6]. PCC voltage endure be expressed by (1): Abstract-In this paper, power cal iber receipts by victimisation a new body structure of non superconducting fault current limiter (NSFCL) is discussed. This structure prevents voltage sags on Point of Common Coupling (PCC) skilful after fault occurrence, because of its unfaltering operation. On the other hand, antecedently used structures produce harmonics on load voltage and collapse 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 ar and simulation results are presented to validate the effectiveness of this structure. I. INTRODUCTION Electric power pretended character can be defined as the capable ness of an electric power system to supply ! nix for a load in acceptable ZK VPCC = VS (1) tonus. Consequently, power quality problems work became a Z K + (Z S + Z t ) major concern in the power systems [1, 2]. potential down 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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