The project focuses on the design and the application of differential protection scheme for 15MVA power transformer. load flow analysis on voltages, real and reactive power generated and absorbed across the entire system load is carried out., also, A well simulated coordination employs circuit breakers at various load points as required by the network in question, ensuring proper tripping of the appropriate breaker under fault conditions. The maximum and minimum fault current are all three-phase symmetrical (30 cycle network) values and the pre-fault voltage equaled 100 percent of the nominal voltage. Furthermore, A current time interval (CTI) of 3.5 seconds was used between the relays and was later increase to 4 seconds base on time of operation between the relays to ensure proper coordination between the relay elements, total reactive power of 6513kVar,fault current of 3,137.77 (A) and a mismatch of 0.1MVA was obtained. it was noticed that the transformers and buses were overloaded, but with an upgrade of transformer rating, 2×15MVA and implementation of 90×300KVar capacitor bank major improvement was attained. The model was created using ETAP software.
Transformer, Protection, Line, Relay, Coordination, Circuit Breaker, Overload, ETAP, Software, Capacitor, Banks.
Otonye Ene Ojuka , Biobele Alexander Wokoma , Kpekpee Tornubari Festus "Improved Protection Scheme for RSU 15MVA Power Transformer" Iconic Research And Engineering Journals Volume 5 Issue 11 2022 Page 209-214
Otonye Ene Ojuka , Biobele Alexander Wokoma , Kpekpee Tornubari Festus "Improved Protection Scheme for RSU 15MVA Power Transformer" Iconic Research And Engineering Journals, 5(11)