Modelling Transfer Function of Power Transformers Using Sweep Frequency Response Analysis

Jayarathna, K. L. I. M. Pramod B.; Ediriweera, W. E. P. Sampath; Lucas, J. R.; Samarasinghe, Rasara

doi:10.1109/mercon.2018.8421904

Cited by 5 publications

(1 citation statement)

References 7 publications

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“…The commercial software is mainly based on the frequency domain solver [10][11]. It should be noticed that the frequency domain algorithm can merely solve the problem in the individual frequency point [12][13]. In order to obtain considerable accuracy, the discretized frequency point must be chosen as fine enough which can be denoted as frequency sweeping [14].…”

Section: Introductionmentioning

confidence: 99%

Analysis of Scattering Characteristics Based on Crank-Nicolson Direct-Splitting Algorithm for Remote Sensing Problems

Gao,

Jiang,

Fan

et al. 2024

IEEE Open J. Antennas Propag.

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In remote sensing problems, broadband scattering investigation becomes increasingly important than ever before. The scattering characteristic changes significantly with the variation of range. Thus, the conventional evaluation method becomes invalid in many situations. Meanwhile, an efficient method for the simulation of electromagnetic wave propagation in electrically large remote sensing problem is also an urgently demanding. In order to alleviate such problems, an alternative Crank-Nicolson Direct-Splitting algorithm is proposed in open regions. To infinite extension of the computational domain, convolutional perfectly match layer with higher order formulation is proposed not only to further enhance the absorption at low-frequency band but also to decrease the reflections during the entire time domain simulation. Efficient method is proposed for scattering characteristics evaluation which ranges from near-field to far-field. Radar remote sensing Problems including ground penetrating radar and early warning radar are introduced to demonstrate the effectiveness of the algorithm. Through the results, it can be concluded that the proposed algorithm shows considerable performance in the simulation of remote sensing problems.

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Section: Introductionmentioning

confidence: 99%

Analysis of Scattering Characteristics Based on Crank-Nicolson Direct-Splitting Algorithm for Remote Sensing Problems

Gao,

Jiang,

Fan

et al. 2024

IEEE Open J. Antennas Propag.

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The study of sweep frequency response analysis for inspecting the performance of transformer

Habibi

Zain

Sudarto

et al. 2020

J. Phys.: Conf. Ser.

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Transformer had been widely used for supplying electric power to many motors, such as electric pump, fans, or conveyors. The motor voltage may vary that is depending on its power and speed between one to another motor. The load needs the transformer which generate the proper voltage. Unfortunately, the working performance of transformer is slowly decreasing because of its daily operation. The repetition of the transformer technical assessment by observing the transformer performance is needed. This study provides the periodical inspection of high-power transformer in maintenance and outage condition in the one of utility sites in Indonesia. The checking activity maintenance the eligible performance of the user device. The measurement of Sweep Frequency Response Analysis (SFRA) in the 5th unit had been inspected once in every six years. The measured result was obtained in 2007 and 2013. SFRA test diagnoses the characteristics of transformer winding and core by injecting low voltage at a certain frequency. If SFRA diagnoses the winding fault, then the transformer should be replaced or should get a major maintenance. The result of SFRA measurement provides the transformer winding and core still in a good condition because the shrinkage does not exceed 20% of its standard percentage. Therefore, the 500 kV power transformer, located in PT. YTL East Java, does not have to get serious maintenance.

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An Improved Wide Frequency Model for VFTO of Power Transformers Using Transfer Functions

Jayarathna

Ediriweera

Samarasinghe

et al. 2018

2018 2nd International Conference on Electrical Engineering (EECon)

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Modelling Transfer Function of Power Transformers Using Sweep Frequency Response Analysis

Cited by 5 publications

References 7 publications

Analysis of Scattering Characteristics Based on Crank-Nicolson Direct-Splitting Algorithm for Remote Sensing Problems

Analysis of Scattering Characteristics Based on Crank-Nicolson Direct-Splitting Algorithm for Remote Sensing Problems

The study of sweep frequency response analysis for inspecting the performance of transformer

An Improved Wide Frequency Model for VFTO of Power Transformers Using Transfer Functions

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