Title :
EHV/HV autotransformers modeling for electromagnetic transients simulation of power systems
Author :
Colla, L. ; Iuliani, V. ; Palone, F. ; Rebolini, M. ; Taricone, C.
Author_Institution :
Eng. Dept., Terna S.p.A., Italy
Abstract :
Autotransformers are a widespread component in some transmission networks as the Italian one, mainly as they are an effective solution in interconnecting EHV to HV networks. Accurate autotransformers representation in electromagnetic transients studies can be very complex due to the non-linearity and frequency dependency of parameters. The used model is suitable to model transients up to few kHz and takes into account residual flux, hysteresis and EM field propagation through the core. The model is validated in the paper by means of full-scale tests on a 250 MVA-50Hz 400/135 ± 10% kV autotransformer.
Keywords :
EMTP; autotransformers; electromagnetic fields; power system transients; transmission networks; EHV-HV autotransformers modeling; EM field propagation; apparent power 250 MVA; electromagnetic transients simulation; frequency 50 Hz; power systems; residual flux; transmission networks; voltage 135 kV; voltage 400 kV; Capacitance; Finite element methods; Integrated circuit modeling; Magnetic cores; Surges; Voltage measurement; Windings; Autotransformer; EMTP; SFRA; transients;
Conference_Titel :
Electrical Machines (ICEM), 2010 XIX International Conference on
Conference_Location :
Rome
Print_ISBN :
978-1-4244-4174-7
Electronic_ISBN :
978-1-4244-4175-4
DOI :
10.1109/ICELMACH.2010.5607995
