Open AccessDevelopment and research of mathematical model of current transformer reproducing magnetic hysteresis based on Preisach theory
Author(s) -
Andreev Mikhail,
Suvorov Alexey,
Ruban Nikolay,
Ufa Ruslan,
Gusev Alexander,
Askarov Alisher,
Kievets Anton
Publication year - 2020
Publication title -
iet generation, transmission and distribution
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.92
H-Index - 110
eISSN - 1751-8695
pISSN - 1751-8687
DOI - 10.1049/iet-gtd.2018.6796
Subject(s) - transformer , relay , current transformer , waveform , computer science , ampere , magnetization , electronic engineering , magnetic hysteresis , hysteresis , voltage , electrical engineering , engineering , power (physics) , magnetic field , physics , condensed matter physics , quantum mechanics
Due to increasing complexity of power systems the task of ensuring adequate operation of relay protection becomes more urgent. Detailed mathematical models of relay protection together with modern power system simulators are proposed to be used as a solution of this problem. At the same time, the adequate simulation of instrumental transformers, in particular the magnetization process of the core, is very important because the waveform of signals controlled by relay protection largely determined by transducers' errors. The developed mathematical model of current transformer reproducing the magnetic hysteresis in accordance with the Preisach theory is presented in the paper. Unlike other similar models, the Preisach' particle distribution function in the developed model is based not on the reference typical magnetizing curves, but on the volt–ampere characteristic of current transformer. This approach is better applicable in practice, since typical magnetization curves are not always available and become less relevant during transformer operation. There are presented the results of impact assessment of different types and values of burden on current transformer operation and comparison of the implemented model with existing methods of magnetization and hysteresis modeling. The adequate behavior of the developed model has been confirmed by the research.