A Sparse Linear Systems Implementation for Electric Power Systems Solution Algorithms

Araujo, Leandro Ramos de; Penido, Débora Rosana Ribeiro; Pereira, J.L.R.; Carneiro, S.

doi:10.1007/s40313-013-0042-1

Cited by 4 publications

(3 citation statements)

References 15 publications

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“…The measurements were carried out in accordance with the regulations in force in the territory of the Russian Federation. Measurements were carried out using a certified device "Resource-UF2M" Calculation of additional electric losses caused by changes in the current unbalance, calculated according to the technique proposed by Professor Fedor Dmitievich Kosoukhov [5]. This technique was implemented in the program "Unbalance".…”

Section: Posing the Questionmentioning

confidence: 99%

“…E3S Web of Conferences 209, 07007 (2020) ENERGY-21 https://doi.org/10.1051/e3sconf/202020907007 [5] describes an allocation methodology for capacitor placement in unbalanced distribution systems to achieve loss minimization with an adequate voltage profile. Switched capacitor banks and/or fixed banks can be allocated on a per-phase or multi-phase, discrete basis, and this allows consideration of the actual unbalanced characteristics of distribution systems.…”

Section: Introductionmentioning

confidence: 99%

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Additional electric loss in rural distribution networks 0.38 kV

et al. 2020

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The article presents calculations the additional electric loss in the case of three-phase voltage system unbalance in the real rural electrical distribution networks (0.38 kV). Measurements were carried out at substations that receive power from distribution substation “Petropavlovsk”. Measurements were carried out using a certified device “Resource-UF2M”. Also presented are graphs of changes in currents/voltages of the negative-sequence and zero-sequence, electric loss and other parameters. The results of the economic assessment of electricity losses are presented. As a result, the proposed method for reducing the power loss factor, that can reduce the losses of electricity.

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Section: Posing the Questionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Additional electric loss in rural distribution networks 0.38 kV

et al. 2020

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“…This allowed the obtaining of a sparse system of algebraic equations of a fixed structure. Direct solvers based on matrix decomposition were applied in [9].…”

Section: Introductionmentioning

confidence: 99%

Identification of Inhomogeneities: The Selected Coordinate Descent Method Applied in the Drilling Area

Smaglichenko,

Smaglichenko

2023

Mathematics

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The exploration of inhomogeneities is a crucial factor for industries because of the necessary control of the quality of output products or the check adequacy of the data from the helping information systems. In the energy-conception field, the preliminary study of borehole areas has special importance because it can avoid risks of secure drilling and financial expenses. In this paper, an innovative option of the traditional coordinate descent method called selected coordinate descent, was investigated by collating its fundamentals with other methods used in various industrial branches. A practical application of selected coordinate descent was performed for experimental data of seismic event registration observed in the region of geothermal plants. An explicit formula for the resolution parameter was utilized to distinguish well and poorly resolved anomalies. The inhomogeneities were validated on the basis of a good resolution and comparison with data from other disciplines. The main result of our study is the performance of the algebraic technique application in the reconstruction of large-size structures. The identification of the found seismic inhomogeneities permits us to indicate the sites that are questionable for drilling and to obtain knowledge about the rock types at crucial depths.

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