3393

3212

كارشناسي ارشد

قدرت

اصفهان: دانشگاه صنعتي اصفهان، دانشكده برق و كامپيوتر

1385

ده، 85 [II]ص.: مصور، نمودار

ص. ع به فارسي و انگليسي

حميد رضا كارشناس

محمد ابراهيمي

اكبر ابراهيمي، محمد مدني

مهندسي برق و كامپيوتر

ID3212

به فارسي و انگليسي: قابل روئت درنسخه ديجيتالي

Abstract The concept of power quality is a major concern in modern power systems The growth ofsensitive loads and their susceptibility to various disturbances are the main reasons of theseconcerns Voltage sag swell and outage are three important and popular events that cause themajority of power quality related problems Different solutions have been proposed for relievingsuch problems such as using Constant Voltage Transformers UPS motor generator sets andtransfer load between two existing feeders The latter which is particularly suitable and economicalfor large loads and facilities may be performed either by mechanical or by static switches Thenature of most modern loads does not allow the large delay associated with transfer of power bymechanical switches Consequently the issue of static transfer switches has recently attracted theattention of both industries and researchers It is possible to significantly reduce the transfer timebetween two feeders by using static switches However the possibility of short circuiting thefeeders on one hand and the variety of disturbances and existing loads on the other hand result insome complications in this process This thesis is concerned with finding a suitable algorithm forstatic transfer switches with adequate performance under all operating conditions Specifically theoperation with light loads regenerative loads and when the supplies are slightly out of phase areconsidered Extensive simulation results show the validity of analysis

حميد رضا كارشناس

محمد ابراهيمي

اكبر ابراهيمي، محمد مدني