International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 12 Issue: 05 | May 2025
p-ISSN: 2395-0072
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Implementation of transformer protection Scheme with immunity against saturation of current transformer Dina Mourad 1, Zakaria Mahmoud 2, Mostafa Safwat Alqayaty3, Dr. Abdul Latif Syed Ahmed4 1Faculty of Engineering, Pine Sattam university, Elkharg, Saudi Arabia.
2Faculty of Technology and Education, Helwan University, Cairo, Egypt. 3Faculty of Engineering, Helwan University, Cairo, Egypt.
4Lecturer, Department of Electrical Power, Faculty of Engineering, Helwan University
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supply equipment [9]. However, traditional protection methods struggle to distinguish between faults [10-11-12] and also face issues with coordination between protection zones [13-14]. Protecting the electrical network or delaying fault detection can lead to interruptions in power supply [15-16]. Therefore, relying solely on traditional protection methods for the saturation problem is inadequate [17-18]. The transformer protection system needs to be adaptable, fast, and protected against saturation [18-19-20]. This paper presents an experimental investigation into a protection algorithm against saturation caused by short circuits, tested in the laboratory using an integrated power system that simulates a real system for fixed-speed wind turbines (a DC motor supplied with constant voltage and a constant current source) [21], an induction generator mechanically connected to a three-phase electrical transformer, and a three-phase-transmission-Line.
Abstract- In this research, we will discuss protection against current transformer saturation. A system was built to simulate the real system of the electrical power production system in the college laboratory, where experiments were conducted on the transformer during the synchronization process with the electrical grid. In these experiments, short circuit faults were intentionally created to study their effects on the transformer. To collect data and analyze results, a IN 6009 card was used to gather readings from the system and transfer them to the computer. Then, Lab VIEW software was used to analyze and convert the readings into useful results. These results help to understand how saturation affects the performance of the transformer and to develop effective protection strategies. This research will review the results obtained from the experiments and discuss possible solutions to prevent current transformer saturation and ensure the continuity and safety of the power production system.
2-UsedTechnique:
Keywords: Production, transformer, laboratory, software, saturation, current transformer, short circuit, inrush current.
2.1. In this technique, the principles of the proposed technique are illustrated as follows in a quick review. The designed algorithm relies on establishing a relationship between the current signal resulting from the low voltage Iscv1 and the high voltage signal Icsv2.
INTRODUCTION Electric power systems are characterized by continuous flow during generation, transmission, and distribution, and they are safe and error-free [1]. Due to the many advantages they offer, engineers strive to solve the problem of power flow interruption [2]. One of the issues facing transformers is the problem of saturation [3]. The saturation problem in transformers, in general, and in current transformers, in particular, prevents the flow of electrical power [4]. Therefore, it is necessary to study the saturation problem practically in the laboratory [5], as saturation can result from several causes such as short circuits [6]. Since a short circuit is a real fault and not a transient condition [7], it requires protecting the electrical system from saturation resulting from short circuits [8]. Studies and literature have shown that short electrical faults are among the most damaging factors to power
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2.2. Reading the three-phase relay current and the fault current at the beginning of the operation. 2.3. The algorithm verifies the existence of current in two parallel paths: the first path represents the current calculations on the high voltage side, and the second path on the low voltage side. 2.4. The program begins performing calculations on the two parallel paths. 2.5. Calculate the difference in the value of i 1 - i2 the high voltage and low voltage, and the concept of differential protection.
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