4481

4209

كارشناسي ارشد

قدرت

اصفهان: دانشگاه صنعتي اصفهان، دانشكده برق و كامپيوتر

1387

ده، 117، [II]ص: مصور، جدول، نمودار

ص.ع. به: انگليسي و فارسي

اكبر ابراهيمي

حميدرضا كارشناس

88/2/29

مهدي معلم، محمد اسماعيل همداني گلشن

مهندسي برق و كامپيوتر

ID4209

به فارسي وانگليسي:قابل رويت در نسخه ديجيتال

Impact of DG operation on reliability evaluation of distribution systems Seyed Mostafa Hashemi Toghroljerdi hashemi@ec iut ac ir March 11 2009 Department of Electrical and Computer Engineering Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language FarsiSupervisor Akbar Ebrahimi ebrahimi@cc iut ac irAbstract The distribution system is an important part of the total electric power system as it providesthe final link between the bulk system and the customer Analysis of the customer failurestatistics of most utilities shows that the distribution systems makes the greatest individualcontribution to the unavailability of supply to a customer Distribution system reliability is animportant issue in system planning and operating At present the electric power industry isundergoing considerable change with respect to structure operation and regulation As aresult of power system restructuring using distributed generation DG has been increasinglyattended By definition the DG is of limited size generally 10 MW or less and connected atthe substation distribution feeder or customer load level Nowadays using DG is a goodmethod to contribute small sellers in competitive electricity market and also a convenientmethod to generate electric power from renewable energy The study and reliabilityevaluation of distribution system with DG is essential since these generators are commonlyconnected to distribution systems In this thesis reliability evaluation of distribution systems in different operation modes ofDG is studied Both analytical and simulation techniques have been used to evaluate thereliability of distribution system containing DG An analytical method is proposed in order toevaluate reliability indices in the presence of certain amount of generated power by DGs withcontinuous or temporary availability This method is based on connection matrix and hourlyload curve Accuracy of this analytical method is comparable with the simulation methods Furthermore another algorithm is proposed for networks with wind turbine which is acommon example of uncertain generation sources This algorithm is based on randommodeling of DG by using the Monte Carlo Simulation MCS Both methods are applied to adistribution test system and standard indices of reliability are calculated to show goodperformance and accuracy of proposed methods Key WordsReliability Distribution System Distributed Generation Analytical Method MonteCarlo Simulation

اكبر ابراهيمي

حميدرضا كارشناس

مهدي معلم، محمد اسماعيل همداني گلشن