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title: Ð²ÑÐ¿ÑÑÐºÐ½Ð°Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð¼Ð°Ð³Ð¸ÑÑÑÐ°
titleType: Subtitle
title: Research of the efficiency of digital filtering for the recovery of secondary currents in measuring transformers during transients process
Creators: name: Ð¤ÑÐ¾Ð»Ð¾Ð², ÐÐ½ÑÐ¾Ð½
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2021
Subjects: Ð¢ÑÐ°Ð½ÑÑÐ¾ÑÐ¼Ð°ÑÐ¾ÑÑ
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description: The theme of the graduate qualification work is Â«Research of the efficiency of digital filtering for the recovery of secondary currents in measuring transformers during transients processÂ». This work is focused to the problem of distortion of the secondary current TT due to saturation in transient conditions and methods for restoring the secondary current curve for the correct functioning of relay protection and automation devices based on the created computer model. Tasks that were solved during the research: 1. Analysis of existing methods for restoring the distorted secondary current TT due to saturation. 2. Creating a computer model of a current transformer. 3. Behavior of the current transformer in transient conditions. 4. Reconstruction the secondary current curve using digital filtering. As a result of the work, the potential work conditions of the current transformer were analyzed using the developed computer model. Also, method for restoring secondary current due saturation of CT with using the Kalman filter was research. The study of the efficiency of filtering secondary current with using the Kalman filter showed that the method successfully restores the secondary current curve and reduces the total harmonic distortion coefficient.