EHV/HV autotransformers modeling for electromagnetic transients simulation of power systems

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 an...

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Bibliographic Details
Main Authors: Colla, L, Iuliani, V, Palone, F, Rebolini, M, Taricone, C
Format: Conference Proceeding
Language:English
Subjects:
Autotransformer
Capacitance
EMTP
Finite element methods
Integrated circuit modeling
Magnetic cores
SFRA
Surges
transients
Voltage measurement
Windings
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Summary: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.
DOI:10.1109/ICELMACH.2010.5607995