8197

7595

كارشناسي ارشد

قدرت

اصفهان: دانشگاه صنعتي اصفهان، دانشكده برق و كامپيوتر

1392

چهارده،95ص.: مصور،جدول،نمودار

ص.ع.به فارسي و انگليسي

اكبر ابراهيمي

10/9/92

رضا يوسفي، محمد امين لطيفي

مهندسي برق و كامپيوتر

ID7595

به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي

96 Reliability Study of HV Substations Distribution Networks Equipped With Fault Current Limiter Somayeh Mehri Boroujeni Somayeh mehri@ec iut ac ir Date of Submission 2013 21 09 Department of Electrical and Computer Engineering Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language FarsiSupervisors Akbar Ebrahimi Ebrahimi@cc iut ac irAbstract Continuously increasing consumption of electric energy especially in developingcountries and for many strategic consumers in which electricity failure would causeirreparable damages have made the reliability issues as an important factor in electricalenergy generation transmission and distribution systems In order to supply everincreasing demand in acceptable level of system reliability the number and capacity ofpower plants transmission lines and distribution network should be expanded and powertransfer to neighboring networks is inevitable The main challenge toward power system development is the remarkable increment inthe network short circuit current level as a result of the network equivalent Theveninimpedance reduction Consequently network equipments will face higher fault currents mechanical forces and temperature rise during the failures Among the various methodsfor Limiting short circuit current level utilization of Fault Current Limiter FCL technology is more easy and economic Installation of FCL is possible withoutt long time load curtailment being imposed on the power systems However installation of FCL in a substation imposes new fault modes and as a resultsubstation reliability indices will be varied In order to quantitatively clarify thesevariations reliability indices this thesis investigates all fault modes related to the variousconfigurations of high voltage substations including single busbar single breaker doublebusbar single breaker ring busbar one and half breaker design and double busbar doublebreaker with the presence of FCL and without it and failure and annual outage rate indicesare calculated These indices have been utilized for investigating the effects of FCL on thesubstation reliability Furthermore the effect of FCL on various sections of distributionsystem has been investigated For this purpose System Average Interruption Frequency SAIFI System Average Interruption Duration SAIDI Average Service Availability ASAI and Energy Not Supplied ENS indices as traditional reliability measures ofdistribution system reliability are calculated and compared Fault analysis and its effectsmethod is considered as a general scheme for these reliability analysis Keywords Fault Current Limiter High Voltage Substation Distribution SystemReliability

اكبر ابراهيمي

رضا يوسفي، محمد امين لطيفي