Results 1 to 10 of about 422 (84)
Online SFRA for Reliability of Power Systems: Characterization of a Batch of Healthy and Damaged Induction Motors for Predictive Maintenance [PDF]
Sensors, 2023 Asynchronous motors represent a large percentage of motors used in the electrical industry. Suitable predictive maintenance techniques are strongly required when these motors are critical in their operations. Continuous non-invasive monitoring techniques
Giovanni Bucci +5 more
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A New NILM System Based on the SFRA Technique and Machine Learning [PDF]
Sensors, 2023 In traditional nonintrusive load monitoring (NILM) systems, the measurement device is installed upstream of an electrical system to acquire the total aggregate absorbed power and derive the powers absorbed by the individual electrical loads.
Simone Mari +4 more
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Sweep frequency response analysis (SFRA) for the assessment of winding displacements and deformation in power transformers [PDF]
Electric Power Systems Research, 2008 The sweep frequency response analysis (SFRA) is an analysis technique for detecting winding displacement and deformation (among other mechanical and electrical failures) on power and distribution transformers. Nowadays, there is an increasing interest in SFRA method because of its sensibility in detecting mechanical faults without opening the unit ...
Secue, Janneth R. +1 more
openaire +4 more sources
High-Frequency Modeling of a Three-Winding Power Transformer Using Sweep Frequency Response Analysis
Energies, 2021 A power transformer is an essential device for stable and reliable power transfer to customers. Therefore, accurate modeling of transformers is required for simulation-based analysis with the model.
Yeunggurl Yoon +5 more
doaj +1 more source
Ain Shams Engineering Journal, 2022 The electric power transformer is an essential component of an electrical power system because it regulates the voltage level to provide the best possible system operation.
Khalid H. Ibrahim +2 more
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Implementation of the SFRA method as valuable tool for detection of power transformer active part deformation [PDF]
Tehnika, 2014 The paper presents the SFRA (Sweep Frequency Response Analysis-SFRA) method for analyzing frequency response of transformer windings in order to identify potential defects in the geometry of the core and winding. The most frequent problems (recognized by
Milić Saša D., Ilić Denis M.
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Power transformer geometry monitoring of active parts by SFRA method [PDF]
Zbornik Radova: Elektrotehnički Institut "Nikola Tesla", 2014 During regular operation, power transformer windings are continuously exposed to electromechanical stresses and vibrations. Surges during lightning or short circuits may cause the weakening of the mechanical structure and the mechanical reinforcing parts
Ilić Denis +2 more
doaj +1 more source
Measurement Science Review, 2023 The article describes the non-contact and contact analysis of 1-MVA dry power transformers with epoxy-resin insulation using an acoustic camera and frequency analyzer with automatic sweeping for low-middle frequency areas.
Gutten Miroslav +6 more
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Interpretation of sweep frequency response analysis traces on inter-turn short circuit fault [PDF]
, 2020 Sweep frequency response analysis (SFRA) is a reliable method for detection and diagnosis of faults in the active part of transformers. However, although SFRA is widely employed, the interpretation of SFRA signature is still a challenge and require ...
Al-Ameri, S. +4 more
core +3 more sources
Energies, 2020 The power transformer is a key object in the electrical power system. The working principle hasn’t changed since its discovery. The main work nowadays is focused on the rising of the reliability of transformers and lowering power losses.
Maciej Kuniewski
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