Development of 3D BEM code for Computation of a Transformer Winding’s Capacitance Matrix

Trkulja, Bojan; Drandić, Ana; Štih, Željko

doi:10.1016/j.proeng.2017.09.721

Cited by 3 publications

(4 citation statements)

References 10 publications

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“…A distribution transformer is an essential device in the distribution system [1], [6], [7]. It functions as a converter for the 20 kV medium voltage from SUTM into 400/230 V low voltage with the operating voltage of 380/220 V.…”

Section: A Distribution Transformermentioning

confidence: 99%

“…A cause for damaging or reducing the age is the load. The increasing utilisation of electricity by consumers causes load growth in the transformer [1]- [3]. The continuous load growth causes overload.…”

Section: Introductionmentioning

confidence: 99%

“…Meanwhile, according to the standard of the IEEE C.57.91 1999, the average transformer age is 20.55 years, operating at around 30℃ temperature with hotspot threshold up to 110℃. Other than the load, ambient temperature also influences the transformer's hotspot [1], [4], [5]. Higher temperature means higher hotspot that creates heat in the transformer.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Linear Trend Application on the Estimated Age of Distribution Transformer Based on the Load Growth and Environmental Temperature

Azhar

Rahmawati²,

Fadlika³

2019

FESPE

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This research aimed to find the age loss of distribution transformer based on the load growth and ambient temperature to predict the remaining age of the transformer. This research used the remaining estimation age calculation based on load growth that was predicted using the linear trend analysis. The distribution transformer in this research was the BO043 200 kVA, installed in 2012, and was operated in Bolo Feeder, Woha District, Bima Regency. The results showed that the BO043 transformer was operating at the average ambient temperature of 28℃ with the optimum loading threshold of 92.77% from its power rating. The transformer would experience age reduction if the load given were above that value. The calculation results showed that the BO043 transformer had the estimated remaining age of 4 years from the standard 23 years with the 2019 load prediction of 83.39% and up to 115.94% load prediction in 2022.

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Section: A Distribution Transformermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Linear Trend Application on the Estimated Age of Distribution Transformer Based on the Load Growth and Environmental Temperature

Azhar

Rahmawati²,

Fadlika³

2019

FESPE

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“…Capacitances can be calculated using the electrostatic analysis. Numerical computation of the capacitance matrix can be, among others, based on the FEM [10,11] and on the BEM [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Fast computation of electric field and capacitance matrix of transformer windings with boundary element method and adaptive cross approximation

Drandić

Trkulja

2019

IET Electric Power Applications

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Accurate and fast computation of electric fields is of great interest in transformer design. This article presents a fast and precise method of computation of electric field of transformer windings based on the boundary element method and integral equations approach. Additionally, computation of the capacitance matrix of a transformer geometry is presented. Proposed methodology depends on the knowledge of the transformer geometry. Improvement in computational costs and memory requirements of the developed electrostatic solver is achieved by implementation of the adaptive cross approximation algorithm. Results are benchmarked against commercial software based on the finite element method and applicability of the developed solver is proven.

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Transformer capacitance matrix computation using 3D boundary element method and adaptive cross approximation

Drandić

Trkulja

2019

Int J Numerical Modelling

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In this paper, a solver based on a 3D boundary element method (BEM) is presented and verified on a transformer geometry. Using a triangular surface mesh of a winding, the unknown charge distribution is found from known potentials of surfaces using the integral equation approach and point matching. The capacitance matrix is calculated from known potentials in nodes of the system. The application of BEM and point‐matching results in a fully populated system matrix. Therefore, a matrix reduction technique adaptive cross approximation (ACA) is employed in order to reduce the CPU time and memory requirements. Both the accuracy of the direct and the accuracy of the ACA approach are benchmarked against the results obtained using the professional finite element method (FEM)‐based software.

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Development of 3D BEM code for Computation of a Transformer Winding’s Capacitance Matrix

Cited by 3 publications

References 10 publications

Linear Trend Application on the Estimated Age of Distribution Transformer Based on the Load Growth and Environmental Temperature

Linear Trend Application on the Estimated Age of Distribution Transformer Based on the Load Growth and Environmental Temperature

Fast computation of electric field and capacitance matrix of transformer windings with boundary element method and adaptive cross approximation

Transformer capacitance matrix computation using 3D boundary element method and adaptive cross approximation

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