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Artículos de revistas sobre el tema "Newton-Raphson Power Flow (NRPF) method"

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Publicado: 4 de junio de 2021
Última modificación: 5 de febrero de 2022

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1

Li, Yahui, Yang Li, and Yuanyuan Sun. "Online Static Security Assessment of Power Systems Based on Lasso Algorithm." Applied Sciences 8, no. 9 (2018): 1442. http://dx.doi.org/10.3390/app8091442.

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As one important means of ensuring secure operation in a power system, the contingency selection and ranking methods need to be more rapid and accurate. A novel method-based least absolute shrinkage and selection operator (Lasso) algorithm is proposed in this paper to apply to online static security assessment (OSSA). The assessment is based on a security index, which is applied to select and screen contingencies. Firstly, the multi-step adaptive Lasso (MSA-Lasso) regression algorithm is introduced based on the regression algorithm, whose predictive performance has an advantage. Then, an OSSA
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2

Adetona, S., M. Iyayi, and R. Salawu. "Optimal Location of IPFC That Handles Operating Constraints for Reducing Transmission Lines Utilization Levels in Electric Power Grid." Engineering and Technology Research Journal 6, no. 2 (2021): 31–39. http://dx.doi.org/10.47545/etrj.2021.6.2.082.

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The day-to-day increase in electric energy demand with increasing population and urbanization is causing transmission facilities to transfer load at their upper limits; therefore, the probability of failures of these facilities increases. One of the ways of mitigating failures is by constructing more transmission lines; which would serve as alternatives to reduce the transmission line utilization levels (TLUL). However, there are constraints in adopting this method; therefore, the use of Interline Power Flow Controller (IPFC) has been suggested by many researchers; but very few of these studie
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3

Uche, Engr Obi, Fortunatus, Aghara, Jachimma, and Prof Atuchukwu John. "Shunt Compensaton of the Integrated Nigeria’s 330KV Transimission Grid System." Volume 5 - 2020, Issue 9 - September 5, no. 9 (2020): 537–40. http://dx.doi.org/10.38124/ijisrt20sep230.

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The Nigerian Power system is complex and dynamic, as a result of this it is characterized by frequent faults and outages resulting to none steady supply of power to the teaming consumers. This has great effect on the activities and mode of living of Nigerians. The research work was carried out on contingency analysis on the existing integrated 330KV Nigeria grid system and to carry out a shunt compensation on the violated buses, the shutdown of Eket-Ibom line being the case study so as to determine the following; uncertainties and effects of changes in the power system, to recognize limitation
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4

Kulworawanichpong, Thanatchai. "Simplified Newton–Raphson power-flow solution method." International Journal of Electrical Power & Energy Systems 32, no. 6 (2010): 551–58. http://dx.doi.org/10.1016/j.ijepes.2009.11.011.

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5

Tien Tay, Lea, William Ong Chew Fen, and Lilik Jamilatul Awalin. "Improved newton-raphson with schur complement methods for load flow analysis." Indonesian Journal of Electrical Engineering and Computer Science 16, no. 2 (2019): 699. http://dx.doi.org/10.11591/ijeecs.v16.i2.pp699-605.

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<p>The determination of power and voltage in the power load flow for the purpose of design and operation of the power system is very crucial in the assessment of actual or predicted generation and load conditions. The load flow studies are of the utmost importance and the analysis has been carried out by computer programming to obtain accurate results within a very short period through a simple and convenient way. In this paper, Newton-Raphson method which is the most common, widely-used and reliable algorithm of load flow analysis is further revised and modified to improve the speed and
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6

Hlaing, Ya Min Su, and Ze Ya Aung. "Performance Analysis on Transmission Line for Improvement of Load Flow." Advanced Materials Research 433-440 (January 2012): 7208–12. http://dx.doi.org/10.4028/www.scientific.net/amr.433-440.7208.

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This thesis implements power flow application, Newton-Raphson method. The Newton-Raphson method is mainly employed in the solution of power flow problems. The network of Myanma electric power system is used as the reference case. The system network contains 90 buses and 106 brunches. The weak points are found in the network by using Newton-Raphson method. Bus 16, 17, 85 and 86 have the most weak bus voltages. The medium transmission line between bus 87 and bus 17 is compensated by using MATLAB program software. The transmission line is compensated with shunt reactors, series and shunt capacito
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7

Huang, Yue Hua, Bing Sen Xu, Yu Huan Jiang, and Yan Zou. "Another Method for the Polar Coordinates Newton Raphson Power Flow Calculation." Applied Mechanics and Materials 701-702 (December 2014): 227–30. http://dx.doi.org/10.4028/www.scientific.net/amm.701-702.227.

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With the development of the society, the power system flow calculation becomes more important. Another new method for the polar coordinates Newton Raphson power flow calculation was proposed according to the power system operating characteristics. This research eliminated the vacant of the Jacobian matrix completely, reduced the amount of computer memory requirements greatly and also canceled the inversion completely.
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8

Maharana, M. K., and Samrat Malakar. "Sensitivity Based Network Contingency Ranking Using Newton Raphson Power Flow Method." International Journal of Scientific Engineering and Technology 4, no. 2 (2015): 45–49. http://dx.doi.org/10.17950/ijset/v4s2/204.

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9

Le Nguyen, H. "Newton-Raphson method in complex form [power system load flow analysis]." IEEE Transactions on Power Systems 12, no. 3 (1997): 1355–59. http://dx.doi.org/10.1109/59.630481.

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10

Rao, B. Venkateswara, G. V. Nagesh Kumar, R. V. S. Lakshmi Kumari, and M. Vinay Kumar. "Improvement of Power System Security under Network Contingency with Static VAR Compensator." Advanced Materials Research 403-408 (November 2011): 2073–78. http://dx.doi.org/10.4028/www.scientific.net/amr.403-408.2073.

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SVC is incorporated in Newton Raphson method in which Power Flow Solution is a solution of the network under normal operation as well as network contingency, the model of SVC i.e. SVC Susceptance Model is discussed. Newton Raphson Power flow method has been developed for the steady behavior of large complex power systems, it allows the study of power flow under abnormal conditions as well as normal conditions. It is shown that how the system power losses are decreased after incorporating the SVC in this model. It is also shown that how the SVC is useful in network contingency. The results are
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11

Liu, Jianwei, M. M. A. Salama, and R. R. Mansour. "An Efficient Power Flow Algorithm for Distribution Systems with Polynomial Load." International Journal of Electrical Engineering & Education 39, no. 4 (2002): 371–86. http://dx.doi.org/10.7227/ijeee.39.4.7.

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A new, efficient power flow algorithm for complex distribution systems is presented. Voltage ratio is used for convergence control. This method has fast convergence ability for the polynomial load model for which the traditional Newton-Raphson method is usually not adaptable. Test results show the robustness of the proposed method.
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12

Noureddine, Tebbakh, and Labed Djamel. "Load flow analysis using newton raphson method in presence of distributed generation." International Journal of Power Electronics and Drive Systems (IJPEDS) 12, no. 1 (2021): 489. http://dx.doi.org/10.11591/ijpeds.v12.i1.pp489-498.

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<p>Distributed generations (DG), specially including renewable sources such as wind and sun are offering several opportunities for the currently in existence distribution networks and becoming one of the keys of treatment of its problems. Knowing the effects of each kind of DG on distribution networks is a primordial task because DG impacts differ from one kind to another. In this paper, we have analyzed and compared the effects of two kinds of DG, DG which provides real power only and DG which provides real power and reactive power at the same time connected at the critical bus in DN on
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13

Jiann-Fuh Chen and Shin-Der Chen. "Multiobjective power dispatch with line flow constraints using the fast Newton-Raphson method." IEEE Transactions on Energy Conversion 12, no. 1 (1997): 86–93. http://dx.doi.org/10.1109/60.577285.

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14

Liu, Zhangjie, Xin Zhang, Mei Su, Yao Sun, Hua Han, and Peng Wang. "Convergence Analysis of Newton-Raphson Method in Feasible Power-Flow for DC Network." IEEE Transactions on Power Systems 35, no. 5 (2020): 4100–4103. http://dx.doi.org/10.1109/tpwrs.2020.2986706.

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15

Zhang, Han Ping. "An Application of Improved Newton-Ralph Method in Microgrid Power Flow Calculation." Advanced Materials Research 1049-1050 (October 2014): 1448–53. http://dx.doi.org/10.4028/www.scientific.net/amr.1049-1050.1448.

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The traditional methods of power flow calculation are no longer applicable for microgrid for the reason that there are many kinds of DG(distributed generation) in it, the mathematical models of these DGs are different from traditional generations. An unified method is proposed to improve Newton-Raphson power flow calculation method for the bus types of PQ(V) and PI after analyzing and establishing power flow calculation model for each kind of DG. It is proved that this method is correct by comparing the results with the simulation results of DigSILENT. The influences on voltage and power loss
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16

Deng, Jiao-Jiao, and Hsiao-Dong Chiang. "Convergence Region of Newton Iterative Power Flow Method: Numerical Studies." Journal of Applied Mathematics 2013 (2013): 1–12. http://dx.doi.org/10.1155/2013/509496.

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Power flow study plays a fundamental role in the process of power system operation and planning. Of the several methods in commercial power flow package, the Newton-Raphson (NR) method is the most popular one. In this paper, we numerically study the convergence region of each power flow solution under the NR method. This study of convergence region provides insights of the complexity of the NR method in finding power flow solutions. Our numerical studies confirm that the convergence region of NR method has a fractal boundary and find that this fractal boundary of convergence regions persists u
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17

Kamel, Salah, Mamdouh Abdel-Akher, Zhe Chen, Francisco Jurado, and Mohamed Ebeed. "Developed generalised unified power flow controller model in the Newton–Raphson power-flow analysis using combined mismatches method." IET Generation, Transmission & Distribution 10, no. 9 (2016): 2177–84. http://dx.doi.org/10.1049/iet-gtd.2015.1247.

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18

Kamel, Salah, Francisco Jurado, and David Vera. "A simple implementation of power mismatch STATCOM model into current injection Newton–Raphson power-flow method." Electrical Engineering 96, no. 2 (2013): 135–44. http://dx.doi.org/10.1007/s00202-013-0288-4.

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19

Aree, Pichai. "Accurate power-flow initialization of double-cage induction motors using unified Newton-Raphson method." International Transactions on Electrical Energy Systems 27, no. 10 (2017): e2380. http://dx.doi.org/10.1002/etep.2380.

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20

Nazari, Amir Ali, Reza Keypour, M. H. Beiranvand, and Nima Amjady. "A decoupled extended power flow analysis based on Newton-Raphson method for islanded microgrids." International Journal of Electrical Power & Energy Systems 117 (May 2020): 105705. http://dx.doi.org/10.1016/j.ijepes.2019.105705.

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21

Mugaruka Josue, Mugisho, and Regis Nibaruta. "DC RAILWAY POWER FLOW ANALYSIS FOR ADDIS ABABA LIGHT RAIL TRANSIT USING NEWTON RAPHSON METHOD." International Journal of Advanced Research 9, no. 5 (2021): 744–59. http://dx.doi.org/10.21474/ijar01/12900.

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This paper uses Newton–Raphson method for DC power flow analysis of the Addis Ababa light Rail Transit (AALRT). The study focuses onthe line section from Menilik II square station up to Lideta station. First the tractive effort required by the trains for different scenarios such as train movement in a straight line, a curved line, and a line with gradient is computed as the chosen line section contains all these scenarios. Then the total input power will be calculated using computed tractive effort obtained for each scenario and using other input parameters obtained from AALRT, and different
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22

Panyakaew, Pornthep. "Power Flow Solutions by Newton-Raphson Method with Approximated Second-Order Term of Taylor Series." International Review of Electrical Engineering (IREE) 10, no. 6 (2015): 734. http://dx.doi.org/10.15866/iree.v10i6.6994.

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23

Kusekwa, Mashauri Adam. "Load Flow Solution of the Tanzanian Power Network Using Newton-Raphson Method and MATLAB Software." International Journal of Energy and Power Engineering 3, no. 6 (2014): 277. http://dx.doi.org/10.11648/j.ijepe.20140306.11.

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24

Shakil, Muhammad, Zeeshan Rashid, Ghulam Amjad Hussain, and Farhana Umer. "Power Flow Analysis and Optimization in Ring Distribution Network of Bahawalpur using Newton Raphson Method." Indian Journal of Science and Technology 13, no. 27 (2020): 2720–32. http://dx.doi.org/10.17485/ijst/v13i27.916.

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25

D'orto, Manolo, Svante Sjoblom, Lung Sheng Chien, Lilit Axner, and Jing Gong. "Comparing Different Approaches for Solving Large Scale Power-Flow Problems With the Newton-Raphson Method." IEEE Access 9 (2021): 56604–15. http://dx.doi.org/10.1109/access.2021.3072338.

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26

Shabbiruddin, Karma Sonam Sherpa, Sandeep Chakravorty, and Amitava Ray. "Power Flow Investigation Using Cubic Spline Function a Case Study." International Journal of Energy Optimization and Engineering 7, no. 4 (2018): 1–16. http://dx.doi.org/10.4018/ijeoe.2018100101.

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This article presents an approach using cubic spline function to study Load Flow with a view to acquiring a reliable convergence in the Bus System. The solution of the power flow is one of the extreme problems in Electrical Power Systems. The prime objective of power flow analysis is to find the magnitude and phase angle of voltage at each bus. Conventional methods for solving the load flow problems are iterative in nature, and are computed using the Newton-Raphson, Gauss-Seidel and Fast Decoupled method. To build this method, this paper used cubic spline function. This approach can be conside
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27

Agbontaen, Festus Osazee, Joel Osarumwens Egwaile, and Ignatius Kema Okakwu. "Power Flow Analysis of the Enhanced Proposed 330kV Transmission Network of the Nigeria Grid." Mehran University Research Journal of Engineering and Technology 38, no. 4 (2019): 875–84. http://dx.doi.org/10.22581/muet1982.1904.02.

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The Nigeria’s power sector transmission infrastructure continues to be challenged as it still remains the weak link in the electricity supply chain. The Nigerian Federal Government on its Roadmap for power sector reform highlighted that to accommodate the planned increase in generation capacity, there was need for a 30% increase in the “true deliverable” transmission capacity of the country’s 330kV network. But the technical feasibility of this plan is an issue to be considered. In this work, the existing 330kV Nigeria transmission network was expanded by the introduction of new lines and powe
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28

., Yusmartato, Zulfadli Pelawi, Ramayulis ., et al. "Analysis of Stability Improvements by Using Capacitors." International Journal of Engineering & Technology 7, no. 2.13 (2018): 357. http://dx.doi.org/10.14419/ijet.v7i2.13.16920.

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The demand for electricity has increased substantially while the expansion of electricity generation, power transmission is very limited, due to environmental restrictions, consequently some transmission lines, limiting power factor. Power flow in the generation system, covering the area of North Sumatra and Aceh which is managed by PT. PLN (Persero), ETAP 4.0 (Electrical Transient Analizer Program) is a program that can display GUI (Graphical User Interface) with unlimited bus number, ETAP 4.0 is useful for Power flow study. The data required by ETAP 4.0 on a generation system is a one-line d
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29

Yang, Jian, and Zheng Xu. "Power Flow Calculation Methods for Power Systems with Novel Structure UPFC." Applied Sciences 10, no. 15 (2020): 5121. http://dx.doi.org/10.3390/app10155121.

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Latest unified power flow controller (UPFC) projects adopt novel device structures to meet the requirements of practical applications. Developing power flow calculation methods for these new UPFC structures is of great significance for the design and operation of related projects. To address this issue, this paper deduces an equivalent model of the general structure UPFC, and presents the modified power mismatch equations and Jacobian matrix of the system. Then, three power flow calculation methods suitable for the novel structure UPFC are proposed based on the Newton–Raphson algorithm. The ma
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30

Rao, B. Venkateswara, G. V. Nagesh Kumar, R. V. S. Lakshmi Kumari, and M. Vinay Kumar. "Effect of Advanced Static VAR Compensator on Control of Power System Load Shedding." Advanced Materials Research 403-408 (November 2011): 4867–72. http://dx.doi.org/10.4028/www.scientific.net/amr.403-408.4867.

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This paper investigates the effect of Static VAR Compensator (SVC) on power system load shedding. SVC is mainly used in power system stability improvement. This paper proposes a new use of SVC to reduce load shedding. An algorithm of Newton Raphson method (NR) to reduce the load shedding for installing SVC in the system is proposed in this paper. 5 bus test system example is used to demonstrate the effect on load shedding. The test results show that the effect of SVC is significant, in this Static VAR compensator (SVC) is incorporated in Newton Raphson method in which Power Flow Solution is a
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31

Vinkovic, Anton, and Rafael Mihalic. "Universal method for the modeling of the 2nd generation FACTS devices in Newton–Raphson power flow." International Journal of Electrical Power & Energy Systems 33, no. 10 (2011): 1631–37. http://dx.doi.org/10.1016/j.ijepes.2011.06.025.

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32

Nazir, Refdinal, Kiki Kanada, Syafii, and Prima Coveria. "Optimization Active and Reactive Power Flow for PV Connected to Grid System Using Newton Raphson Method." Energy Procedia 68 (April 2015): 77–86. http://dx.doi.org/10.1016/j.egypro.2015.03.235.

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33

Rao, Bharath, Friederich Kupzog, and Martin Kozek. "Three-Phase Unbalanced Optimal Power Flow Using Holomorphic Embedding Load Flow Method." Sustainability 11, no. 6 (2019): 1774. http://dx.doi.org/10.3390/su11061774.

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Distribution networks are typically unbalanced due to loads being unevenly distributed over the three phases and untransposed lines. Additionally, unbalance is further increased with high penetration of single-phased distributed generators. Load and optimal power flows, when applied to distribution networks, use models developed for transmission grids with limited modification. The performance of optimal power flow depends on external factors such as ambient temperature and irradiation, since they have strong influence on loads and distributed energy resources such as photo voltaic systems. To
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34

Ding, Jiaman, Zhixin Chen, and Yi Du. "Probability box theory-based uncertain power flow calculation for power system with wind power." International Journal of Emerging Electric Power Systems 22, no. 2 (2021): 243–53. http://dx.doi.org/10.1515/ijeeps-2020-0227.

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Abstract The uncertainty of wind speed may lead to the deviation and change of wind power output, which influences the stability of wind farm. Therefore, in this paper, a probability box (p-box) based uncertain power flow model for wind power is proposed, which initially introduces p-box to power flow calculation. A probabilistic interval power flow model with both probability and interval is established. Firstly, the drift interval of wind speed is obtained and its p-box model is established by analyzing the distribution of wind speed. Secondly, the wind power output p-box is derived from the
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35

Darmawan, Indra, Fuad Abdurrahman Rafif, and Addien Wahyu Wiratama. "SIMULASI ALIRAN DAYA PADA PEMBANGKIT LISTRIK TENAGA MESIN GAS (PLTMG) BADAS UNTUK SISTEM KELISTRIKAN SUMBAWA BESAR MENGGUNAKAN SOFTWARE ETAP 16." Jurnal Informatika, Teknologi dan Sains 1, no. 2 (2019): 111–16. http://dx.doi.org/10.51401/jinteks.v1i2.416.

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Electric power system is a process of electrical energy generation to dispense to users. A well-integrated system provides quality assurance for system reliability. Analysis is conducted to minimize dispensing losses. The electrical system of Sumbawa Besar is currently in the process of upgrading 150 KV transmission distribution capacity with PLTMG BADAS as the largest generation center. The research was conducted by analyzing the power flow on PLTMG BADAS for the electrical system of Sumbawa Besar which was reviewed on 20 KV bus system, and by simulating using ETAP 16 software . The research
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36

Oh, HyungSeon. "A Unified and Efficient Approach to Power Flow Analysis." Energies 12, no. 12 (2019): 2425. http://dx.doi.org/10.3390/en12122425.

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Highly nonlinear and nonconvex power flow analysis plays a key role in the monitoring, control, and operation of power systems. There is no analytic solution to power flow problems, and therefore, finding a numerical solution is oftentimes an aim of modern computation in power system analysis. An iterative Newton-Raphson method is widely in use. While most times this method finds a solution in a reasonable time, it often involves numerical robustness issues, such as a limited convergence region and an ill-conditioned system. Sometimes, the truncation error may not be small enough to ignore, wh
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37

Zhang, Xiao Ying, Ning Ding, and Chen Li. "Applications of Homotopy Algorithm for Solving Optimal Power Flow of Power System." Applied Mechanics and Materials 494-495 (February 2014): 1627–30. http://dx.doi.org/10.4028/www.scientific.net/amm.494-495.1627.

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This paper introduces an homotopy algorithm which has convergence stability to solve the alternating current optimal power flow problem. The complicated Alternating Current Power Flow (ACPF) can simplify as simple Direct Current Power Flow (DCPF). The homotopy participation factor is introduced into the linear DCPF to make DCPF convert back into ACPF gradually to realize Alternating Current Power Flow Homotopy method (ACPFH). The homotopy curves are generated to solve a series of nonlinear problems.The traditional method can not solve the unstable points,because the calculate process always tu
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38

Haq, M. A., Syafii, H. D. Laksono, and G. Hidayat. "Voltage profile evaluation based on power flow analysis using Newton Raphson method: Central and South Sumatera Subsystem." IOP Conference Series: Materials Science and Engineering 602 (September 6, 2019): 012012. http://dx.doi.org/10.1088/1757-899x/602/1/012012.

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39

Wirasanti, Paramet, and Egon Ortjohann. "Active Distribution Grid Power Flow Analysis using Asymmetrical Hybrid Technique." International Journal of Electrical and Computer Engineering (IJECE) 7, no. 4 (2017): 1738. http://dx.doi.org/10.11591/ijece.v7i4.pp1738-1748.

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A conventional distribution power flow analysis has to be improved regards the changes in distribution network. One of the changes is a grid operation because a new grid concept, e.g. micro-grid and aggregation, is aimed to be operated based on area itself. Consequently, each area can be actively operated in either grid connected mode or islanding mode. Hence, this paper proposes an asymmetrical power flow analysis using hybrid technique to support this flexible mode change. The hybrid technique offers an opportunity to analyze power flow in a decoupling way. This means that the power flow ana
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40

Al-Sakkaf, A., and M. AlMuhaini. "Power Flow Analysis of Weakly Meshed Distribution Network Including DG." Engineering, Technology & Applied Science Research 8, no. 5 (2018): 3398–404. http://dx.doi.org/10.48084/etasr.2277.

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Power flow is one of the essential studies in power system operation and planning. All steady-state parameters for power distribution systems, such as bus voltage magnitudes, angles, power flows, and power losses, can be calculated by conducting power flow analysis. Distribution system features differ from those of transmission system, rendering conventional load flow algorithms inapplicable. In this paper, three distribution power flow techniques are presented and tested to evaluate their performance when applied to a networked distribution system including distributed generation (DG). These
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41

Fan, Rui Xiang, Hong Xia Xiao, and Hong Chen. "Study on the Optimal Allocation Method of Distributed Generation Capacity." Advanced Materials Research 516-517 (May 2012): 1443–47. http://dx.doi.org/10.4028/www.scientific.net/amr.516-517.1443.

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In distribution network, there are multiple constraint condition on the capacity allocation of distributed generation, this text takes the maximization of power generation benefit as the premise, and adopts genetic algorithm to implement the optimal allocation of distributed generation’s capacity. The algorithm uses the minimum distribution network power consumption as objective function, the admissible deviation of supply voltage and capacity accessed to common point not more than 10MVA are taken as the constraint condition, and the Newton-Raphson method is adopted to carry out power flow cal
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42

Xiao, Y., and Y. H. Song. "Power flow studies of a large practical power network with embedded facts devices using improved optimal multiplier newton-raphson method." European Transactions on Electrical Power 11, no. 4 (2001): 247–56. http://dx.doi.org/10.1002/etep.4450110406.

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43

Bhavithira, V., and A. Amudha. "Enhancement of Available Transfer Capability Using FACTS Controller." Applied Mechanics and Materials 573 (June 2014): 340–45. http://dx.doi.org/10.4028/www.scientific.net/amm.573.340.

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Abstract. This paper discusses about the available transfer capability by using Unified Power Flow Controller-UPFC. Flexible AC Transmission System-FACTS devices helps to reduce power flow on overloaded lines, thereby increasing the loadability of the power system, transient stability, damp out oscillations and also provide security and efficient transmission system. UPFC is one of the most versatile FACTS controllers. It is used for both shunt and series compensation. Newton Raphson method is used to calculate load flow for IEEE 30 bus system. By optimally placing the FACTS device Available T
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44

Kirthiga, M. Venkata, and S. Arul Daniel. "Computational Techniques for Autonomous Microgrid Load Flow Analysis." ISRN Power Engineering 2014 (May 11, 2014): 1–12. http://dx.doi.org/10.1155/2014/742171.

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This paper attempts at developing simple, efficient, and fast converging load flow analysis techniques tailored to autonomous microgrids. Two modified backward forward sweep techniques have been developed in this work where the largest generator is chosen as slack generator, in the first method and all generator buses are modeled as slack buses in the second method. The second method incorporates the concept of distributed slack bus to update the real and reactive power generations in the microgrid. This paper has details on the development of these two methodologies and the efficacy of these
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45

Manjunath, S., and L. Venkata Reddy. "Effect of Boussinesq-Stokes Suspension over an Exponentially Stretching Sheet in a Hydromagnetic Flow." Mapana - Journal of Sciences 11, no. 3 (2012): 93–104. http://dx.doi.org/10.12723/mjs.22.5.

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The paper presents the study of velocity profiles in a hydromagnetic flow of Boussinesq-Stokes suspension over an exponentially stretching impermeable sheet. The basic equations governing the flow are in the form of partial differential equations. The equations have been transformed to nonlinear ordinary differential equation by applying a suitable local similarity transformation. The solution of the transformed equation is obtained by using differential transform method (DTM) with assistance from the Newton-Raphson method in obtaining the unknown initial values. The solution is obtained as a
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46

Nathasri, Winai, Witsaroot Witoontorn, and Surachai Chaitusaney. "Substation Expansion Considering Reliability of Various Bus Configurations and Load Growth." Applied Mechanics and Materials 781 (August 2015): 258–61. http://dx.doi.org/10.4028/www.scientific.net/amm.781.258.

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This paper proposes a method for electrical substation expansion by considering reliability indices of various types of bus configuration in electrical substation. The reliability indices LOLF, LOLP, and EENS are evaluated by using Newton-Raphson power flow calculation with minimal cut sets. The yearly load growth, together with power capacity of components (capacity limit of components), and the operation of protective components are also taken into account. Two types of failures, i.e. active failure and passive failure, are considered. Finally, the reliability of all bus configuration types
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47

Ethmane, I. A., M. Maaroufi, A. K. Mahmoud, and A. Yahfdhou. "Optimization for Electric Power Load Forecast." International Journal of Electrical and Computer Engineering (IJECE) 8, no. 5 (2018): 3453. http://dx.doi.org/10.11591/ijece.v8i5.pp3453-3462.

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Load flow studies are one of the most important aspects of power system planning and operation. The main information obtained from this study comprises the magnitudes and phase angles of load bus voltages, reactive powers at generators buses, real and reactive power flow on transmission lines, other variables being known. To solve the problem of load flow, we use the iterative method, of Newton-Raphson. Analysis of the found results using numerical method programmed on the Matlab software and PSS/E Simulator lead us to seek means of controlling the reactive powers and the bus voltages of the N
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48

Montoya, Oscar Danilo, Walter Gil-González, and Diego Armando Giral. "On the Matricial Formulation of Iterative Sweep Power Flow for Radial and Meshed Distribution Networks with Guarantee of Convergence." Applied Sciences 10, no. 17 (2020): 5802. http://dx.doi.org/10.3390/app10175802.

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This paper presents a general formulation of the classical iterative-sweep power flow, which is widely known as the backward–forward method. This formulation is performed by a branch-to-node incidence matrix with the main advantage that this approach can be used with radial and meshed configurations. The convergence test is performed using the Banach fixed-point theorem while considering the dominant diagonal structure of the demand-to-demand admittance matrix. A numerical example is presented in tutorial form using the MATLAB interface, which aids beginners in understanding the basic concepts
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49

Han, Bing, and Yonggang Li. "Power flow optimization for DC distribution grid with distributed energy access based on Newton–Raphson method through upper level control." Cluster Computing 22, S4 (2018): 8999–9006. http://dx.doi.org/10.1007/s10586-018-2035-0.

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50

Pan, Zhongmei, Jianzhong Wu, Tao Ding, Jian Liu, Fei Wang, and Xiangqian Tong. "Load flow calculation for droop-controlled islanded microgrids based on direct Newton–Raphson method with step size optimisation." IET Generation, Transmission & Distribution 14, no. 21 (2020): 4775–87. http://dx.doi.org/10.1049/iet-gtd.2019.1722.

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