Modeling of custom power devices

ABSTRACTPhD THESISMODELING OF CUSTOM POWER DEVICESK. Ça atay BAYINDIRDEPARTMENT OF ELECTRICAL AND ELECTRONICS ENGINEERINGINSTITUTE OF NATURAL AND APPLIED SCIENCESUNIVERSITY OF ÇUKUROVASupervisor: Prof. Dr. Mehmet TÜMAYYear: June 2006, Pages: 207Jury: Prof. Dr. Süleyman GÜNGÖRProf. Dr. Mehmet TÜMAYAssoc. Prof. Dr. Tankut YALÇINÖZAsst. Prof. Dr. lyas EKERAsst. Prof. Dr. Ulus ÇEV KCustom Power is a concept, based on the application of power electronicsbased devices aimed at enhancing the reliability and quality of power in distributionnetworks. This thesis focuses on modeling and analysis of Custom Power Devices.The modeling approach adopted is graphical in nature, as opposed to mathematicalmodels embedded in code using a high-level computer language and all models arepresented clearly and in a detailed manner.Matlab/Simulink based models for the following Custom Power Devices arepresented: Shunt Active Power Filter, Static Transfer Switch (STS), Dynamic VoltageRestorer (DVR) and Unified Power Quality Conditioner (UPQC). The application offuzzy logic is recently growing in power electronic systems. The advantages of fuzzylogic controllers over conventional controllers are that they do not need an accuratemathematical model; they can work with imprecise inputs and can handle non-linearity. In this thesis fuzzy logic based voltage and current control methods aredeveloped for PWM inverters which form the power electronic heart of the newCustom Power Devices. Developed methods can also be utilized in other similarinverter control applications.Comprehensive results through case studies are presented to evaluate theperformance of each modeled device. In the case studies, characteristic values forpower system parameters are taken which are typical for industry.Keywords: Custom Power, Active Power Filter, STS, DVR, UPQC.II