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Journal articles on the topic 'Grid modeling'

Author: Grafiati

Published: 25 June 2021

Last updated: 29 July 2025

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1

Khokhlov, Nikolai Igorevich, Vladislav O. Stetsyuk, and Ivan A. Mitskovets. "Overset grids approach for topography modeling in elastic-wave modeling using the grid-characteristic method." Computer Research and Modeling 11, no. 6 (2019): 1049–59. http://dx.doi.org/10.20537/2076-7633-2019-11-6-1049-1059.

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Rosay, Sophie, Simon Weber, and Marcello Mulas. "Modeling grid fields instead of modeling grid cells." Journal of Computational Neuroscience 47, no. 1 (2019): 43–60. http://dx.doi.org/10.1007/s10827-019-00722-8.

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Kenzhebekov, D. M., А. Е. Khussanov, I. Iristaev, А. Zholshybek, and D. Janabayev. "GENERATION AND CONFIGURATIONOF A HEAT EXCHANGER MODEL GRID FOR CFD MODELING IN COMSOL MULTIPHYSICS." Mechanics and Technologies, no. 1 (March 30, 2025): 279–85. https://doi.org/10.55956/ptul4611.

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The stages of creating a three-dimensional computational domain and generating a grid model for CFD modeling of flow hydrodynamics in a pipe-in-pipe heat exchanger are considered in detail. The sequence of actions for grid generation in COMSOL multiphysics is described. A description is given of the method of thickening the grid by dissecting the volume with a surface and constructing grids with the required interval in each of the resulting connected volumes. A model grid with triangular and square elements was used for the heat exchange model. The construction and adjustment of the model gri

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Xu, S., B. Wang, and J. Liu. "On the use of Schwarz–Christoffel conformal mappings to the grid generation for global ocean models." Geoscientific Model Development 8, no. 10 (2015): 3471–85. http://dx.doi.org/10.5194/gmd-8-3471-2015.

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Abstract. In this article we propose two grid generation methods for global ocean general circulation models. Contrary to conventional dipolar or tripolar grids, the proposed methods are based on Schwarz–Christoffel conformal mappings that map areas with user-prescribed, irregular boundaries to those with regular boundaries (i.e., disks, slits, etc.). The first method aims at improving existing dipolar grids. Compared with existing grids, the sample grid achieves a better trade-off between the enlargement of the latitudinal–longitudinal portion and the overall smooth grid cell size transition.

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MacDonald, Alexander E., Jacques Middlecoff, Tom Henderson, and Jin-Luen Lee. "A general method for modeling on irregular grids." International Journal of High Performance Computing Applications 25, no. 4 (2010): 392–403. http://dx.doi.org/10.1177/1094342010385019.

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For simulation on a spherical surface, such as global numerical weather prediction, icosahedral grids are superior to their competitors in uniformity of grid mesh distance across the entire globe and lack of neighboring grid cells that share only a single vertex. Use of such a grid presents unique programming challenges related to iteration across grid cells and location of neighboring cells. Here we describe an icosahedral grid with a one-dimensional vector loop structure, table specified memory order, and an indirect addressing scheme that yields very compact code despite the complexities of

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Askarova, A. S., S. A. Bolegenova, V. Y. Maksimov, and E. Medetuly. "FEATURES OF BULDING A GRID FOR 3D MODELING OF A WIND TURBINE." Bulletin of Shakarim University. Technical Sciences 1, no. 2(14) (2024): 347–55. http://dx.doi.org/10.53360/2788-7995-2024-2(14)-43.

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The article deals with the problem of constructing a grid for 3D modeling of a wind turbine by a nonstationary air flow. To solve the problem, two grids are constructed: the first from the rotating part, the second from the non-rotating part. Consequently, blockMesh, snappyHexMesh, TransformPoint, reconstructParMesh, mergeMeshes, changeDictionary utilities are used to build the grid as part of the OpenFOAM package. The solution of the main problems in the construction of the grid is determined: the first is a combination of static and moving grid, the second axis of rotation is not parallel to

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Zhang, Hui, and Fajian Nie. "Magnetotelluric Forward Modeling Using a Non-Uniform Grid Finite Difference Method." Mathematics 12, no. 19 (2024): 2984. http://dx.doi.org/10.3390/math12192984.

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Magnetotelluric (MT) forward modeling is essential in geophysical exploration, enabling the investigation of the Earth’s subsurface electrical conductivity. Traditional finite difference methods (FDMs) typically use uniform grids, which can be computationally inefficient and fail to accurately capture complex geological structures. This study addresses these challenges by introducing a non-uniform grid-based FDM for MT forward modeling. The proposed method optimizes computational resources by varying grid resolution, offering finer grids in areas with complex geology and coarser grids in more

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Tavarov, Saidjon, and Kristina Ivshina. "Simulation modeling of urban power grid operation mode." Energy Safety and Energy Economy 1 (February 2022): 10–14. http://dx.doi.org/10.18635/2071-2219-2022-1-10-14.

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Certain variable factors can impact reliability and efficiency of power grids. In this paper, we investigated contribution of variable factors into operation of urban power grid in the city of Dushanbe, Tajikistan, as an example. An indicator reflecting some specific reasons of uneven phase loads in power grids during peak hours was offered. A simulation model was built in Matlab and typical scenarios of power consumption were analyzed. The simulation results verified that a power grid operation mode is subject to change depending on considered variable factors.

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Xu, S., B. Wang, and J. Liu. "On the use of Schwarz–Christoffel conformal mappings to the grid generation for global ocean models." Geoscientific Model Development Discussions 8, no. 2 (2015): 1337–73. http://dx.doi.org/10.5194/gmdd-8-1337-2015.

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Abstract. In this article we propose two conformal mapping based grid generation algorithms for global ocean general circulation models (OGCMs). Contrary to conventional, analytical forms based dipolar or tripolar grids, the new algorithms are based on Schwarz–Christoffel (SC) conformal mapping with prescribed boundary information. While dealing with the basic grid design problem of pole relocation, these new algorithms also address more advanced issues such as smoothed scaling factor, or the new requirements on OGCM grids arisen from the recent trend of high-resolution and multi-scale modelin

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Alpak, Faruk O., and Tianhong Chen. "Dynamic effects of fault modeling on stair-step and corner-point grids." Journal of Petroleum Exploration and Production Technology 11, no. 3 (2021): 1323–38. http://dx.doi.org/10.1007/s13202-020-01082-1.

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AbstractFault modeling has become an integral element of reservoir simulation for structurally complex reservoirs. Modeling of faults in general has major implications for the simulation grid. In turn, the grid quality control is very important in order to attain accurate simulation results. We investigate the dynamic effects of using stair-step grid (SSG) and corner-point grid (CPG) approaches for fault modeling from the perspective of dynamic reservoir performance forecasting. We have performed a number of grid convergence and grid-type sensitivity studies for a variety of simple, yet intuit

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Sharma, Shivam, and Durgesh Kumar. "Modeling of Photovoltaic Based Grid-Tied System." International Journal of Advance Research and Innovation 2, no. 2 (2014): 103–11. http://dx.doi.org/10.51976/ijari.221415.

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Energy consumption in world is now increasing substantially. Increasing scarcity and rising prices of fossil fuels may lead to economic instability. Continuously increasing in energy consumption will overloads the distribution grids as well as the power stations, therefore imposing a negative impact on power availability, security and quality. One of the solutions for overcoming this is use of renewable energy resources. The energy generation from PV based Grid-Tied System is highly intermittent in nature and shows wide variation because of continuous fluctuations in solar radiation intensity,

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Li, Mingke, Heather McGrath, and Emmanuel Stefanakis. "Geovisualization of Hydrological Flow in Hexagonal Grid Systems." Geographies 2, no. 2 (2022): 227–44. http://dx.doi.org/10.3390/geographies2020016.

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Recent research has extended conventional hydrological algorithms into a hexagonal grid and noted that hydrological modeling on a hexagonal mesh grid outperformed that on a rectangular grid. Among the hydrological products, flow routing grids are the base of many other hydrological simulations, such as flow accumulation, watershed delineation, and stream networks. However, most of the previous research adopted the D6 algorithm, which is analogous to the D8 algorithm over a rectangular grid, to produce flow routing. This paper explored another four methods regarding generating flow directions i

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Protsenko, S. V. "Forecasting the development dynamics of coastal systems utilizing remote sensing data." E3S Web of Conferences 549 (2024): 07006. http://dx.doi.org/10.1051/e3sconf/202454907006.

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The article addresses the task of adapting the third-generation mathematical wind-wave model, WAVEWATCH III, for constructing predictive scenarios of the Azov Sea development based on satellite imagery data. In addition to the effective utilization of remote sensing data, WAVEWATCH III enables modeling using multicellular grids, thereby reducing the temporal constraints required for forecasting hydrophysical phenomena, including hazardous and catastrophic events. Within the article, modeling of the dynamics of the coastal system of the Sea of Azov is conducted based on remote sensing data. The

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Steppeler, Jürgen. "Spherical Grid Creation and Modeling Using the Galerkin Compiler GC_Sphere." Atmosphere 14, no. 6 (2023): 966. http://dx.doi.org/10.3390/atmos14060966.

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The construction of spherical grids is, to a large extent, a question of organized programming. Such grids come in the form of rhomboidal/triangular grids and hexagonal grids. We are here mainly interested in Local-Galerkin high-order schemes and consider the classical fourth-order o4 method for comparison. High-order Local-Galerkin schemes imply sparse grids in a natural way, with an expected saving of computer runtime. Sparse grids on the sphere are described for rhomboidal and hexagonal cells. They are obtained by not using some of the full grid points. Technical problems and grid organizat

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Nilsen, Halvor M., K. A. A. Lie, and Jostein R. Natvig. "Accurate Modeling of Faults by Multipoint, Mimetic, and Mixed Methods." SPE Journal 17, no. 02 (2012): 568–79. http://dx.doi.org/10.2118/149690-pa.

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Summary The predominant way of modeling faults in industry-standard flow simulators is to introduce so-called transmissibility multipliers in the underlying two-point discretization. Although this approach provides adequate accuracy in many practical cases, two-point discretizations are only consistent for K-orthogonal grids and may introduce significant discretization errors for grids that severely depart from being K-orthogonal. Such grid-distortion errors can be avoided by lateral or vertical stair-stepping of deviated faults at the expense of errors in the geometrical fault description. In

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Jia, Zhuo, Sixin Liu, Siyuan Cheng, Xueran Zhao, and Gongbo Zhang. "Modeling of Complex Geological Body and Computation of Geomagnetic Anomaly." Mathematical Problems in Engineering 2020 (May 27, 2020): 1–10. http://dx.doi.org/10.1155/2020/9839606.

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Modeling plays an important role in engineering exploration. However, the traditional rectangular mesh cannot meet the requirement because the actual shape of the model may be very complex. Therefore, this paper chooses the Delaunay grid for modeling and applies this method to magnetic numerical simulation. At the same time, we make use of the advantages of the Delaunay grid and choose to use grid encryption technology in the boundary and complex area of the model. Then, the formula for calculating the magnetic anomaly of tetrahedron is deduced in detail, and the magnetic anomaly with surface

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Mustafin, Maksat, and Olzhas Turar. "APPLICATION OF PINN AND THE METHOD OF DIFFERENTIAL CONSTRUCTION OF ADAPTIVE ONE-DIMENSIONAL COMPUTATIONAL GRIDS." Journal of Problems in Computer Science and Information Technologies 2, no. 3 (2024): 30–35. http://dx.doi.org/10.26577/jpcsit2024-02i03-04.

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This paper presents an approach to constructing adaptive one-dimensional computational grids using the Beltrami equation and Physics-Informed Neural Networks (PINNs). The main focus is on exploring the potential for precise control of grid node density through the control function ω(s), which allows the grid to adapt to the local features of the problem. The Beltrami equation used, being a key component of the method, regulates the distribution of nodes by modifying the function’s derivatives depending on the values of the control function. The effectiveness of this approach is demonstrated th

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Yuan, Rong Chang, Zian Wang, Li Xin Li, Fang Chun Di, Zhi Xiang Ji, and Jiao Dai. "Distributed Modeling Technology for Large Power Grid Modeling Based on Cloud Computing." Applied Mechanics and Materials 448-453 (October 2013): 2721–29. http://dx.doi.org/10.4028/www.scientific.net/amm.448-453.2721.

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As the original grid model cant meet the needs of smart grid development, a distributed grid modeling and integrated management technologies based on cloud computing are proposed in this paper. In this scheme, a multi-level integrated "model cloud" is developed with horizontal collaboration and vertical cut-through using cloud storage, cloud services, cloud computing and other related technologies. The grid models of levels of dispatching institutions are gathered, stored and managed with unified model service. The scheme can dress the issues of device naming, information sharing, model exchan

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He, Wei, and Wen Li Wu. "Study on Algorithm for Grid Subdivision and Encryption Based on Technology of Three Dimensional Geological Modeling." Applied Mechanics and Materials 336-338 (July 2013): 1416–21. http://dx.doi.org/10.4028/www.scientific.net/amm.336-338.1416.

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To achieve 3D grid models which have a non-uniform size and varying properties, we proposed the algorithm of grid subdivision and encryption by human-computer interaction. This algorithm was the technology based on 3D geological modeling, and achieving process has following three steps. Firstly, we converted many 2D cross sections to 3D space, and reconstructed 3D vector models using the algorithm of optimal path suture, and set the property of abnormal body and surrounding rock. Then, achieving 3D grids subdivided according to the relationship between the center of 3D grid and 3D vector model

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Alhamrouni, Ibrahim, Wira Wahab, M. Salem, Nadia H. A. Rahman, and Lili Awalin. "Modeling of micro-grid with the consideration of total harmonic distortion analysis." Indonesian Journal of Electrical Engineering and Computer Science 15, no. 2 (2019): 581. http://dx.doi.org/10.11591/ijeecs.v15.i2.pp581-592.

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<p>With the rapid expansion of electricity grid, there yet still places to be covered considering their remote location. Micro-grid (MG) is a solution in this scenario, in fact, there is actually many cases where MG is used in case of emergency and act as a backup to the main electrical grid. By disconnecting itself from the larger grid, a grid that can have many problems, the micro-grid becomes much more flexible in its operations and by continuing to power households and communities alike. Besides grid-connected mode, it is necessary for the MG to operate in autonomous mode. By operati

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Bohlen, Thomas, and Erik H. Saenger. "Accuracy of heterogeneous staggered-grid finite-difference modeling of Rayleigh waves." GEOPHYSICS 71, no. 4 (2006): T109—T115. http://dx.doi.org/10.1190/1.2213051.

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Heterogeneous finite-difference (FD) modeling assumes that the boundary conditions of the elastic wavefield between material discontinuities are implicitly fulfilled by the distribution of the elastic parameters on the numerical grid. It is widely applied to weak elastic contrasts between geologic formations inside the earth. We test the accuracy at the free surface of the earth. The accuracy for modeling Rayleigh waves using the conventional standard staggered-grid (SSG) and the rotated staggered grid (RSG) is investigated. The accuracy tests reveal that one cannot rely on conventional numeri

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Martynenko, S. I. "Remarks on Generation of the Orthogonal Structured Grids." Herald of the Bauman Moscow State Technical University. Series Natural Sciences, no. 82 (2019): 16–26. http://dx.doi.org/10.18698/1812-3368-2019-1-16-26.

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Grid generation techniques have contributed significantly toward the application of mathematical modeling in large-scale engineering problems. The structured grids have the advantage that very robust and parallel computational algorithms have been proposed for solving (initial-)boundary value problems. Orthogonal grids make it possible to simplify an approximation of the differential equations and to increase computation accuracy. Opportunity of the orthogonal structured grid generation for solving two- and three-dimensional (initial-)boundary value problems is analyzed in the article in assum

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23

Melosh, Robert J. "Modeling Accuracy in FEA of Vibrations of a Drumhead." Shock and Vibration 1, no. 1 (1993): 15–20. http://dx.doi.org/10.1155/1993/485825.

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The study of the problem of predicting values of Rayleigh’s quotient for a square drumhead provides a basis for assessing the relation between grid size, accuracy of analysis results, and efficiency of data processing in finite element analysis. The analysis data indicate that unacceptable grid sampling can occur even for the fine grids, that strictly monotonic convergence is attainable for vibration analysis, and that more efficient computer analysis associates with use of curve fitting analysis of conventional finite element analysis results.

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Mohd Sakri, Fadhilah, Mohamed Sukri Mat Ali, and Sheikh Ahmad Zaki. "Benchmark on the Dynamics of Liquid Draining Inside a Tank." E3S Web of Conferences 95 (2019): 02009. http://dx.doi.org/10.1051/e3sconf/20199502009.

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Immense information and details observation of flow physics inside a draining tank can be achieved by adopting reliable numerical simulations. Yet the accuracy of numerical results has been always debatable and it is mainly affected by the grid convergence error and computational modeling approaches. Hence, this study is divided into two stages. In the first stage, this paper determines a systematic method of refining a computational grid for a liquid draining inside a tank using OpenFOAM software. The sensitivity of the computed flow field on different mesh resolutions is also examined. In or

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Zeng, Kaiwen, Fusheng Li, Jianing Liu, et al. "An Exploratory Investigation on Modelling Technologies to Flexible Loads Dispatching in A Smart Grid Environment." E3S Web of Conferences 194 (2020): 03013. http://dx.doi.org/10.1051/e3sconf/202019403013.

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As the proportion of flexible load resources in smart grids continues to rise, resulting in increasingly complex grid structures, significant changes in grid characteristics, and increased risks to grid operation and control, it will be difficult to intelligently regulate the grid solely by relying on traditional resource regulation methods, and the dispatchable space for traditional resources will become smaller and smaller. To this end, this paper conducts an exploratory investigation on the modeling techniques for flexible loads participation in smart grid dispatching. First, a classificati

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Mallison, Brad, Charles Sword, Thomas Viard, William Milliken, and Amy Cheng. "Unstructured Cut-Cell Grids for Modeling Complex Reservoirs." SPE Journal 19, no. 02 (2014): 340–52. http://dx.doi.org/10.2118/163642-pa.

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Summary Effective workflows for translating Earth models into simulation models require grids that preserve geologic accuracy, offer flexible resolution control, integrate tightly with upscaling, and can be generated easily. Corner-point grids and pillar-based unstructured grids fail to satisfy these objectives; hence, a truly 3D unstructured approach is required. This paper describes unstructured cut-cell gridding tools that address these needs and improve the integration of our overall reservoir-modeling workflows. The construction of simulation grids begins with the geologic model: a numeri

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Gibson, Richard L., Kai Gao, Eric Chung, and Yalchin Efendiev. "Multiscale modeling of acoustic wave propagation in 2D media." GEOPHYSICS 79, no. 2 (2014): T61—T75. http://dx.doi.org/10.1190/geo2012-0208.1.

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Conventional finite-difference methods produce accurate solutions to the acoustic and elastic wave equation for many applications, but they face significant challenges when material properties vary significantly over distances less than the grid size. This challenge is likely to occur in reservoir characterization studies, because important reservoir heterogeneity can be present on scales of several meters to ten meters. Here, we describe a new multiscale finite-element method for simulating acoustic wave propagation in heterogeneous media that addresses this problem by coupling fine- and coar

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Karamchandani, Prakash, Krish Vijayaraghavan, and Greg Yarwood. "Sub-Grid Scale Plume Modeling." Atmosphere 2, no. 3 (2011): 389–406. http://dx.doi.org/10.3390/atmos2030389.

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Baboshin, Andrey. "Ontology modeling of grid-applications." SPIIRAS Proceedings, no. 11 (March 17, 2014): 252. http://dx.doi.org/10.15622/sp.11.16.

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Ludwig, A. "Wire grid modeling of surfaces." IEEE Transactions on Antennas and Propagation 35, no. 9 (1987): 1045–48. http://dx.doi.org/10.1109/tap.1987.1144220.

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Chitkusheva-Dimitrovska, Biljana, Marko Cepin, Roman Golubovski, and Hristina Spasevska. "Modeling photovoltaic grid inter-shading." Thermal Science 24, no. 6 Part B (2020): 4183–95. http://dx.doi.org/10.2298/tsci200116169c.

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Photovoltaic energy conversion is an efficient renewable source affordable as a technology even on the household level. Several technological aspects are subject to continuous improvement. This paper tackles the possibilities for denser panel population of a photovoltaic plant thus more efficient space utilization. The objective is to develop a mathematical model of inter-shading among the photovoltaic panels. The model calculates the electrical energy obtained from panels and considers the shading among the panels. The geographical location of the plant location, the distances between the sol

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Ivanenko, Sergey A., and Galina V. Muratova. "Adaptive grid shallow water modeling." Applied Numerical Mathematics 32, no. 4 (2000): 447–82. http://dx.doi.org/10.1016/s0168-9274(99)00063-x.

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Pugliese, Andrea, Domenico Talia, and Ramin Yahyapour. "Modeling and Supporting Grid Scheduling." Journal of Grid Computing 6, no. 2 (2007): 195–213. http://dx.doi.org/10.1007/s10723-007-9083-7.

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Sharma, C. "Modeling of an island grid." IEEE Transactions on Power Systems 13, no. 3 (1998): 971–78. http://dx.doi.org/10.1109/59.709085.

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Petrenko, A. I. "Computer modeling of grid systems." Electronics and Communications 15, no. 5 (2010): 40–48. http://dx.doi.org/10.20535/2312-1807.2010.58.5.284347.

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The program design tool GrіdSіm is considered and analysed, which is intended for research of planning and resources use mechanisms in the Grid-systems for the purpose of estimation of their capability to behavial simulation of the national Grid-infrastructure different possible variants

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He, Hong Peng, Yan Hao Huang, Jun Liu, and Jian Lei Fan. "Research on Ontology Modeling Method of Smart Grid." Applied Mechanics and Materials 291-294 (February 2013): 2079–83. http://dx.doi.org/10.4028/www.scientific.net/amm.291-294.2079.

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Smart grid makes new request for the representation and application of power grid knowledge. To solve the problem of “information isolated island” caused by the continuous development of power grid and the ineffectively use of massive domain knowledge, ontology technology is introduced into the smart grid field. Each link of smart grid is analyzed and new request for knowledge it makes is introduced. Then a simple introduction of ontology and ontology modeling is made. Referring to the defects of existing ontology modeling methods and considering the specific reality of smart grid, an ontology

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Wang, Ning, Jian-Wen Bao, Jin-Luen Lee, Fanthune Moeng, and Cliff Matsumoto. "Wavelet Compression Technique for High-Resolution Global Model Data on an Icosahedral Grid." Journal of Atmospheric and Oceanic Technology 32, no. 9 (2015): 1650–67. http://dx.doi.org/10.1175/jtech-d-14-00217.1.

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AbstractModern Earth modeling systems often use high-resolution unstructured grids to discretize their horizontal domains. One of the major challenges in working with these high-resolution models is to efficiently transmit and store large volumes of model data for operational forecasts and for modeling research.A newly developed compression technique is presented that significantly reduces the size of datasets produced by high-resolution global models that are discretized on an icosahedral grid. The compression technique is based on the wavelet transform together with a grid rearrangement algo

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Cuda, G., P. Veltri, and M. Cannataro. "Modeling and Designing a Proteomics Application on PROTEUS." Methods of Information in Medicine 44, no. 02 (2005): 221–26. http://dx.doi.org/10.1055/s-0038-1633951.

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Summary Objectives: Biomedical applications, such as analysis and management of mass spectrometry proteomics experiments, involve heterogeneous platforms and knowledge, massive data sets, and complex algorithms. Main requirements of such applications are semantic modeling of the experiments and data analysis, as well as high performance computational platforms. In this paper we propose a software platform allowing to model and execute biomedical applications on the Grid. Methods: Computational Grids offer the required computational power, whereas ontologies and workflow help to face the hetero

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ILIE, MIHĂIȚĂ-ALEXANDRU, and DAN FLORICĂU. "GRID-CONNECTED PHOTOVOLTAIC SYSTEMS WITH MULTILEVEL CONVERTERS – MODELING AND ANALYSIS." REVUE ROUMAINE DES SCIENCES TECHNIQUES — SÉRIE ÉLECTROTECHNIQUE ET ÉNERGÉTIQUE 68, no. 1 (2023): 77–83. http://dx.doi.org/10.59277/rrst-ee.2023.68.1.13.

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In this paper, a comparison between three double-stage grid-connection systems in central inverter configuration is presented. This configuration can be used to obtain a wide power range and is suitable for the connection to three-phase grids. In this case, the photovoltaic (PV) panels are connected to the inverter via a dc-dc converter to ensure an optimal dc voltage level. The focus is on the characteristics and properties of the used converter’s structures. All the design steps of a grid connection system are also presented. Both two-level (2L) and three-level (3L) voltage structures are im

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Tao, Hao, Yao H¨ua Tang, Xu Zhan Zhou, and Hong Wei Wang. "Frequency Response Model of Regional Power Grid Based on Parameter Identification on Trip Process of Transmission Line." Applied Mechanics and Materials 448-453 (October 2013): 2406–10. http://dx.doi.org/10.4028/www.scientific.net/amm.448-453.2406.

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Many large power grid accidents show that the tripped transmission line has great impact on system stability. The primary frequency regulation effects of generation units play key roles during a trip procedure. In this paper, a frequency stability dynamic mathematic model of regional power grid was built based on records of a practical trip accident of transmission line between regional grids. Key parameters of the model were identified. The identified parameters are within their reasonable regions. The simulation results show that the modeling method based on parameter identification can be u

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Xiao, Xiao Ping, Zi Sheng Li, and Wei Gong. "Fuzzy Fractal Interpolation Surface and its Applications." Advanced Materials Research 542-543 (June 2012): 1141–44. http://dx.doi.org/10.4028/www.scientific.net/amr.542-543.1141.

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Tackling of uncertain data is a major problem in analysis, modeling and simulation. Fractal interpolation surface and fuzzy set method are employed to solve the issue of uncertainty in modeling irregular surface. Initial interpolation data grid point is used as the kernel of Gaussian fuzzy membership function and its fuzzy numbers can be calculated by specifying λ of λ-cut set. These fuzzy numbers are used as uncertain data, which are the boundaries of the fluctuation of initial grid, and defined as a new kind of fuzzy interpolation grids. With these interpolation grids fractal interpolation s

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Kovalov, Serhii, and Svitlana Botvinovska. "VARYING THE SHAPE OF A SURFACE WHICH IS DISCRETE PRESENTED BY AN IRREGULAR BALANCED GRID." Management of Development of Complex Systems, no. 45 (March 1, 2021): 89–96. http://dx.doi.org/10.32347/2412-9933.2021.45.89-96.

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The article discusses a problem, the solution of which is related to the research previously described in previous publications. This paper demonstrates the solution of the problem of forming a discrete frame, in the form of a balanced irregular grid, discretely represented surface. The described problem is solved by one of the methods of discrete modeling, using the static-geometric method of Professor Kovalev S.N. (SGM). The initial conditions for the formation of such irregular balanced discrete networks are the coordinates of the nodes of the reference loop, the topological organization of

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Yuan, Wen Hua, Yi Ma, Jun Fu, Yuan Tang, Wei Chen, and Zhi Guo Zhu. "Impact of Grid Type on the Stress-Strain of 175F Diesel Engine Piston Structure Calculated by the Finite Element." Applied Mechanics and Materials 635-637 (September 2014): 584–88. http://dx.doi.org/10.4028/www.scientific.net/amm.635-637.584.

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The finite element modeling is based on the aluminum-silicon alloy piston compression performance test by using both 10-node tetrahedron element and 10-node hexahedron element. After analyzing four grid types, we found that employing both tetrahedron element and hexahedron element can obtain stress-strain nephogram, but with a difference between the four modeling results. In the context of having the same grid size, 10-node hexahedron element reflects a fairly accurate piston stress-strain status than the 10-node tetrahedron element, and among the four schemes, the result calculated by analyzi

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Walz, Kathrin, and Krzysztof Rudion. "Charging Profile Modeling of Electric Trucks at Logistics Centers." Energies 17, no. 22 (2024): 5613. http://dx.doi.org/10.3390/en17225613.

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The future charging requirements of electric trucks will lead to new demands on the power grid. In order not to slow the expansion of the charging infrastructure for electric trucks, the power grid must be strengthened for this purpose. However, due to the limited penetration of electric trucks in fleets to date, grid planners lack information on their time- and location-dependent charging demand. The question arises as to how the charging demand of electric trucks can be realistically taken into account in power grid simulations. This paper therefore presents a methodology that makes it possi

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Qaisar, Muhammad Waqas, Jiang Lai, and Jingyang Fang. "Modeling and Control of Grid-Forming Active Power Filters for Harmonic Suppression and Enhanced Power Quality." Applied Sciences 15, no. 11 (2025): 5927. https://doi.org/10.3390/app15115927.

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Grid-forming converters (GFMCs) have gained significant attention for their functionality in grid voltage formation and grid-supportive services. However, managing harmonic distortions caused by nonlinear loads remains a critical challenge in weak grids. This paper presents a novel grid-forming active power filter (GFMC APF) that integrates voltage and frequency regulation with effective harmonic control. The proposed control method generates harmonic voltage commands by detecting voltage at the point of common coupling. The GFMC APF compensates harmonic voltages by creating a near short-circu

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Fleck, Michael, Felix Schleifer, and Patrick Zimbrod. "Frictionless Motion of Diffuse Interfaces by Sharp Phase-Field Modeling." Crystals 12, no. 10 (2022): 1496. http://dx.doi.org/10.3390/cryst12101496.

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Diffuse interface descriptions offer many advantages for the modeling of microstructure evolution. However, the numerical representation of moving diffuse interfaces on discrete numerical grids involves spurious grid friction, which limits the overall performance of the model in many respects. Interestingly, this intricate and detrimental effect can be overcome in finite difference (FD) and fast Fourier transformation (FFT)-based implementations by employing the so-called sharp phase-field method (SPFM). The key idea is to restore the discretization-induced broken translational invariance (TI)

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Chen, Aihua, Ziyuan Pan, Junyi Liu, et al. "Study on Forecasting Electricity Consumption Based on Statistical Modeling." Journal of Physics: Conference Series 3012, no. 1 (2025): 012067. https://doi.org/10.1088/1742-6596/3012/1/012067.

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Abstract With the advancement of smart grid technology, accurate forecast of electricity consumption has become crucial for grid load management and power generation planning. To this end, this paper innovatively constructs a composite model that combines the theoretical advantages of the ARIMA model and the STIRPAT model with a view to more comprehensively forecasting future electricity consumption in Guangdong and analyzing its influencing factors for optimal grid management. First, this study logarithmized population size (P), wealth (A) and technology level (T) and explored the impact of t

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Aoun, Alain, Mehdi Adda, Adrian Ilinca, Mazen Ghandour, Hussein Ibrahim, and Saba Salloum. "Efficient Modeling of Distributed Energy Resources’ Impact on Electric Grid Technical Losses: A Dynamic Regression Approach." Energies 17, no. 9 (2024): 2053. http://dx.doi.org/10.3390/en17092053.

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Technical losses in electrical grids are inherent inefficiencies induced by the transmission and distribution of electricity, resulting in energy losses that can reach up to 40% of the generated energy. These losses pose significant challenges to grid operators regarding energy sustainability, reliability, and economic viability. Distributed Energy Resources (DERs) offer promising solutions to lower technical losses by decentralizing energy generation and consumption, reducing the need for long-distance transmission and optimizing grid operation. Hence, estimating the impact of DERs on grid te

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Ma, Yue, Guoqing Li, Xiaochuang Yao, et al. "A Precision Evaluation Index System for Remote Sensing Data Sampling Based on Hexagonal Discrete Grids." ISPRS International Journal of Geo-Information 10, no. 3 (2021): 194. http://dx.doi.org/10.3390/ijgi10030194.

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With the rapid development of earth observation, satellite navigation, mobile communication, and other technologies, the order of magnitude of the spatial data we acquire and accumulate is increasing, and higher requirements are put forward for the application and storage of spatial data. As a new form of data management, the global discrete grid can be used for the efficient storage and application of large-scale global spatial data, which is a digital multiresolution georeference model that helps to establish a new model of data association and fusion. It is expected to make up for the short

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Pitarka, Arben. "3D Elastic finite-difference modeling of seismic motion using staggered grids with nonuniform spacing." Bulletin of the Seismological Society of America 89, no. 1 (1999): 54–68. http://dx.doi.org/10.1785/bssa0890010054.

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Abstract This article provides a technique to model seismic motions in 3D elastic media using fourth-order staggered-grid finite-difference (FD) operators implemented on a mesh with nonuniform grid spacing. The accuracy of the proposed technique has been tested through comparisons with analytical solutions, conventional 3D staggered-grid FD with uniform grid spacing, and reflectivity methods for a variety of velocity models. Numerical tests with nonuniform grids suggest that the method allows sufficiently accurate modeling when the grid sampling rate is at least 6 grid points per shortest shea

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