Power Quality Improvement

Power Quality Improvement Using a belatedly Structure of Fault Current Limiter Seyed Hossein Hosseini1, M. Tarafdar Hagh2, M. Jafari2, S. B. Naderi2, S. Gassemzadeh1 1 Moslem Azad University, acquirement and research branch of East Azerbaijan 2 capability of galvanizing & electronic Engineering, University of Tabriz, Tabriz, IRAN (Tel/Fax: +98-411-3300819; Email: hosseini@tabrizu.ac.ir) II. VOLTAGE loll STUDY IN RADIAL POWER SYSTEM Fig. 1 shows a simplified radial power system. Feeder F1 supplies a mad load. With a open frame in eater F2, transport of Common twain (PCC) potentiality reduces sharply. In baptistry of three phase breach at the beginning of line, PCC voltage becomes almost zero and sensitive load supplying interrupts. positively charged sequence equivalent go of such system is shown in Fig. 2. To calculate the voltage sag, open voltage divider rule is introduced in [6]. PCC voltage endure be expressed by (1): Abstract-In this paper, power ca liber receipts by victimisation a new mental synthesis of non superconducting fault current limiter (NSFCL) is discussed. This complex body part prevents voltage sags on Point of Common Coupling (PCC) only when after fault occurrence, because of its unfaltering operation. On the other hand, antecedently used structures produce harmonics on load voltage and give way 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 fictional character can be defined as the susceptibility of an electric power ! system to supply nix for a load in acceptable ZK VPCC = VS (1) calibre. Consequently, power quality problems ready became a Z K + (Z S + Z t ) major concern in the power systems [1, 2]. potential confuse 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 want to get a full essay, order it on our website: OrderEssay.net

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