20.500.12556/RUL-30802 Regulacija napetosti na dolgem kabelskem vodu z regulacijskim transformatorjem ob izpadu meritev Voltage control on long AC cable feeder with tap-changing transformer without measurements Regulacija napetosti je običajno izvedena z regulacijskim transformatorjem. Transformator dobi meritve napetosti iz točke regulacije. Glede na te vrednosti napetosti nastavi pravilen prestavni odcep tako, da je napetost v določenih mejah. Kadar je razdalja med meritvami napetosti in transformatorjem dolga, obstaja možnosti, da se zaradi napake pri prenosu izgubijo podatki o napetosti. To pomeni, da prestavni odcep ni nujno pravilen. Cilj raziskave je bil, da se najde možnost regulacije v primeru izgube meritev. Pregled literature je pokazal na dva različna pristopa: kompenzacijo padca napetosti in izračun padca napetosti. Preizkusili smo tudi PQ metodo. Kompenzacija padca napetosti in izračun padca napetosti v večini primerov zanemarita kapacitivnost, kar povzroči preveliko odstopanje od želenih rezultatov. PQ metoda je prikazala natančne in primerne rezultate. Voltage control is usually performed with an on-load tap changing transformer (OLTC). The OLTC’s controller gets voltage measurement values from the regulation point. Based on those values, it sets the correct tap position, so the voltage is within limits. When the distance between voltage measurements and the transformer is long, there is a chance that a fault may occur during data transmission, so we no longer know voltage values at the regulating point. That means the controller cannot set the correct tap position. The goal of the research was to find options for voltage control when we lose the connection to measured voltage values. Literature showed two different approaches that we tried: line drop compensation and calculation of the voltage drop. We also tried the PQ method. Line drop compensation and calculation of the voltage drop neglect capacitance in most cases, which, causes too much deviation from wanted result. The PQ method showed us accurate and adequate results. padec napetosti Ferrantijev efekt pretok moči kompenzacija padca napetosti voltage drop Ferranti effect power flow line drop compensation true false false Angleški jezik Slovenski jezik Magistrsko delo/naloga 2015-05-26 10:20:04 2015-05-26 10:20:05 2022-08-01 11:14:06 0000-00-00 00:00:00 2015 0 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 1970-01-01 28882 Erzar_Katja_-_Regulacija_napetosti_na_dolgem_kabelskem_vodu_z_regulacijskim_transformatorjem_ob_.pdf Erzar_Katja_-_Regulacija_napetosti_na_dolgem_kabelskem_vodu_z_regulacijskim_transformatorjem_ob_.pdf 1 E3BF65960AB79A9073684597AB28781F 973df6789035b917f20dd41660269be1add28940bd2ee1d5ff624d5eba0aa05a 6613533e-a1a8-11eb-a523-00155dcfd717 20.500.12556/rul/df5c63f3-b225-4410-aa0e-3bc3645be29a https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=30799 Fakulteta za elektrotehniko 0 0 0