Comparison of Mathematical Methods for Compensating a Current Signal under Current Transformers Saturation Conditions
Ismoil Odinaev,
Aminjon Gulakhmadov,
Pavel Murzin,
Alexander Tavlintsev,
Sergey Semenenko,
Evgenii Kokorin,
Murodbek Safaraliev,
Xi Chen
Affiliations
Ismoil Odinaev
Department of Automated Electrical Systems, Ural Federal University, 620002 Yekaterinburg, Russia
Aminjon Gulakhmadov
Research Center for Ecology and Environment of Central Asia, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China
Pavel Murzin
Department of Automated Electrical Systems, Ural Federal University, 620002 Yekaterinburg, Russia
Alexander Tavlintsev
Department of Automated Electrical Systems, Ural Federal University, 620002 Yekaterinburg, Russia
Sergey Semenenko
Department of Automated Electrical Systems, Ural Federal University, 620002 Yekaterinburg, Russia
Evgenii Kokorin
STC JSC ”Federal Testing Center”, 734064 Yekaterinburg, Russia
Murodbek Safaraliev
Department of Automated Electrical Systems, Ural Federal University, 620002 Yekaterinburg, Russia
Xi Chen
Research Center for Ecology and Environment of Central Asia, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China
Current measurements from electromagnetic current transformers are essential for the construction of secondary circuit systems, including for protection systems. Magnetic core of these transformers are at risk of saturation, as a result of which maloperation of protection algorithms can possibly occur. The paper considers methods for recovering a current signal in the saturation mode of current transformers. The advantages and disadvantages of methods for detecting the occurrence of current transformers core saturation are described. A comparative analysis of mathematical methods for recovering a current signal is given, their approbation was carried out, and the most promising of them was revealed. The stability and sensitivity of recovery methods were tested by adding white noise to the measured signal and taking into account the initial flux density (remanent magnetization) in the current transformers core. Their comparison is given on the basis of angular, magnitude, and total errors at a given simulation interval.
