Relevant bibliographies by topics / Backward/forward sweep power flow / Journal articles
To see the other types of publications on this topic, follow the link: Backward/forward sweep power flow.

Journal articles on the topic 'Backward/forward sweep power flow'

Author: Grafiati
Published: 4 June 2021
Last updated: 12 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Backward/forward sweep power flow.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Ouali, Saad, and Abdeljabbar Cherkaoui. "An Improved Backward/Forward Sweep Power Flow Method Based on a New Network Information Organization for Radial Distribution Systems." Journal of Electrical and Computer Engineering 2020 (January 17, 2020): 1–11. http://dx.doi.org/10.1155/2020/5643410.

Full text
Abstract:
This paper presents a load flow algorithm based on the backward/forward sweep principle, flexible with network topology changes, with an improvement in ensuring a minimum number of searching for connections between nodes in the calculation sequence in the forward and the backward sweep, by organizing the radial distribution system information into a main line and its derivations. The proposed load flow analysis is easy to implement and does not require the use of any complex renumbering of branches and nodes, or any matrix calculation, with the only use of linear equations based on Kirchhoff’s formulation.
APA, Harvard, Vancouver, ISO, and other styles
2

González-Morán, Cristina, Pablo Arboleya та Bassam Mohamed. "Matrix Backward Forward Sweep for Unbalanced Power Flow in αβ 0 frame". Electric Power Systems Research 148 (липень 2017): 273–81. http://dx.doi.org/10.1016/j.epsr.2017.03.026.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Chang, G. W., S. Y. Chu, and H. L. Wang. "An Improved Backward/Forward Sweep Load Flow Algorithm for Radial Distribution Systems." IEEE Transactions on Power Systems 22, no. 2 (2007): 882–84. http://dx.doi.org/10.1109/tpwrs.2007.894848.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Eminoglu, U., and M. H. Hocaoglu. "Distribution Systems Forward/Backward Sweep-based Power Flow Algorithms: A Review and Comparison Study." Electric Power Components and Systems 37, no. 1 (2008): 91–110. http://dx.doi.org/10.1080/15325000802322046.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Kumar, Abhishek, Bablesh Kumar Jha, Dharmendra Kumar Dheer, Devender Singh, and Rakesh Kumar Misra. "Nested backward/forward sweep algorithm for power flow analysis of droop regulated islanded microgrids." IET Generation, Transmission & Distribution 13, no. 14 (2019): 3086–95. http://dx.doi.org/10.1049/iet-gtd.2019.0388.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Kumar, Vipin, Shubham Swapnil, and V. R. Singh. "Adaptive Algorithm for Solving the Load Flow Problem in Distribution System." Journal of Intelligent Systems 27, no. 3 (2018): 377–91. http://dx.doi.org/10.1515/jisys-2016-0084.

Full text
Abstract:
Abstract This paper presents a fast and efficient method for load flow analysis of radial distribution networks. Here, an adaptive algorithm is proposed to analyze the load flow problem of distribution systems. An adaptive algorithm is the combination of backward/forward (BW/FW) sweep and cuckoo search (CS) algorithms. In the proposed method, the optimum load flow analysis of the radial distribution system is attained, while optimizing the voltage and current computation of the BW/FW sweep algorithm. Now, by the CS, the output voltage of the BW/FW sweep algorithm is compared with the standard voltage and optimized. From the optimized voltage and current, load flow parameters like power loss and real and reactive power flow are assessed. The proposed method is implemented using the MATLAB platform and tested into the IEEE 33 bus radial distribution system. The effectiveness of the proposed technique is determined by comparing with the BW/FW algorithm and genetic algorithm-based BW/FW algorithm.
APA, Harvard, Vancouver, ISO, and other styles
7

Suchite-Remolino, Abner, Hector Francisco Ruiz-Paredes, and Vicente Torres-Garcia. "A New Approach for PV Nodes Using an Efficient Backward/Forward Sweep Power Flow Technique." IEEE Latin America Transactions 18, no. 06 (2020): 992–99. http://dx.doi.org/10.1109/tla.2020.9099675.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Alinjak, Tomislav, Ivica Pavić, and Marinko Stojkov. "Improvement of backward/forward sweep power flow method by using modified breadth-first search strategy." IET Generation, Transmission & Distribution 11, no. 1 (2017): 102–9. http://dx.doi.org/10.1049/iet-gtd.2016.0566.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Duran-Quintero, Michel, John E. Candelo, and Jose Soto-Ortiz. "A modified backward/forward sweep-based method for reconfiguration of unbalanced distribution networks." International Journal of Electrical and Computer Engineering (IJECE) 9, no. 1 (2019): 85. http://dx.doi.org/10.11591/ijece.v9i1.pp85-101.

Full text
Abstract:
<span lang="EN-US">A three-phase unbalanced power flow method can provide a more realistic scenario of how distribution networks operate. The backward/forward sweep-based power flow method </span><span lang="EN-AU">(BF-PF)</span><span lang="EN-US"> has been used for many years as an important computational tool to solve the power flow for unbalanced and radial power systems. However, some of the </span><span lang="EN-AU">few </span><span lang="EN-US">available research tools produce many errors when </span><span lang="EN-AU">they </span><span lang="EN-US">are used for </span><span lang="EN-AU">network </span><span lang="EN-US">reconfiguration </span><span lang="EN-AU">because the </span><span lang="EN-US">topology change</span><span lang="EN-AU">s</span><span lang="EN-AU">after multiple switch actions</span><span lang="EN-US"> and the nodes are disorganized continually. </span><span lang="EN-AU">T</span><span lang="EN-US">his paper presents </span><span lang="EN-AU">a modified</span><span lang="EN-AU">BF-PF for </span><span lang="EN-US">three-phase unbalanced radial </span><span lang="EN-AU">distribution networks</span><span lang="EN-US"> that is capable </span><span lang="EN-AU">of arranging</span><span lang="EN-US"> the system topology when reconfiguration changes the branch connections. A binary search is used to determine the connections between nodes, allowing the algorithm to avoid those problems when reconfiguration is carried out, regardless of node numbers. Tests are made to verify the usefulness of the proposed algorithm in both the IEEE 13-node test feeder and the 123-node test feeder, converging in every run where constraints are accomplished. This approach can be used easily for a large-scale feeder network reconfiguration.</span><span lang="EN-AU"> The full version of this modified </span><span lang="EN-US">backward/forward sweep</span><span lang="EN-AU"> algorithm is available for research at MathWorks</span><span lang="EN-US">.</span>
APA, Harvard, Vancouver, ISO, and other styles
10

Zhang, Buen, Shyuan Cheng, Fanghan Lu, Yuan Zheng, and Leonardo P. Chamorro. "Impact of Topographic Steps in the Wake and Power of a Wind Turbine: Part A—Statistics." Energies 13, no. 23 (2020): 6411. http://dx.doi.org/10.3390/en13236411.

Full text
Abstract:
We experimentally explored the modulation of various forward- and backward-facing topographic steps on the wake and power output of a wind turbine model. The sharp surface changes located in the vicinity of the turbine tower consisted of steps Δz0/dT=−0.64, −0.42, −0.21, 0, 0.21, and 0.42, where Δz0 is the level difference between the upwind and downwind sides of the step and dT is the turbine diameter. Particle image velocimetry was used to obtain the wake statistics in the wake within the streamwise distance x/dT∈[2, 5] and vertical span z/dT∈[−0.7, 0.7], where the origin is set at the rotor hub. Complementary single-point hotwire measurements were obtained in the wake along the rotor axis every Δx/dT=1 within x/dT∈[1, 8]. Mean power output and its fluctuations were obtained for each of the six scenarios. The results indicate strong modulation of the steps in the wake statistics and some effect on the power output. Remarkably, the backward-facing steps induced a larger velocity deficit in the wake with respect to the base case with substantial wake deflection. In contrast, the forward-facing steps exhibited a much lower velocity deficit and negligible wake deflection. The mean flow and velocity gradients’ changes promoted distinct turbulence dynamics and, consequently, associated levels. In particular, turbulence intensity and kinematic Reynolds shear stress were enhanced and reduced with the backward- and forward-facing steps, respectively. It is worth pointing out the particular effect of the steps on the transport of the turbulence kinetic energy TKE. Ejections were predominant around the top tip, whereas sweeps dominated around the turbine hub height. The magnitude of these quantities was sensitive to the step height. In particular, a much weaker sweep occurred in the forward-facing steps; in addition, the flat terrain and the backward-facing step cases shared strong sweeps.
APA, Harvard, Vancouver, ISO, and other styles
11

K.Venkat Rao and Dr.K.RamaSudha. "Optimal Path Solution Using Dijkstra's Algorithm for Practical 21 bus system." International Journal for Modern Trends in Science and Technology 6, no. 12 (2021): 502–9. http://dx.doi.org/10.46501/ijmtst061296.

Full text
Abstract:
This paper presents the Shortest Path Finding algorithm to identify the optimal path for a distribution system during restoration using Dijkstra's method. The objective is to reduce the power losses and obtain an efficient restoration plan after an extensive outage of the system. The power losses of the distribution system are calculated using Forward-Backward sweep load flow method. The proposed method has been implemented for a practical 21 bus distribution system using MATLAB programming .
APA, Harvard, Vancouver, ISO, and other styles
12

Issicaba, Diego, and Jorge Coelho. "Rotational Load Flow Method for Radial Distribution Systems." International Journal of Electrical and Computer Engineering (IJECE) 6, no. 3 (2016): 1344. http://dx.doi.org/10.11591/ijece.v6i3.10083.

Full text
Abstract:
This paper introduces a modified edition of classical Cespedes' load flow method to radial distribution system analysis. In the developed approach, a distribution network is modeled in different complex reference systems and reduced to a set of connected equivalent subnetworks, each without resistance, while graph topology and node voltage solution are preserved. Active power losses are then not dissipated in the modeled subnetworks and active power flows can be obtained as a consequence of radiality. Thus, the proposed method preprocesses a series of variable transformations concomitant to an iterative algorithm using a forward-backward sweep to arrive at the load flow solution. The proposed approach has been tested using literature and actual distribution networks, and efficiency improvements are verified in comparison to Cespedes' load flow method.
APA, Harvard, Vancouver, ISO, and other styles
13

Issicaba, Diego, and Jorge Coelho. "Rotational Load Flow Method for Radial Distribution Systems." International Journal of Electrical and Computer Engineering (IJECE) 6, no. 3 (2016): 1344. http://dx.doi.org/10.11591/ijece.v6i3.pp1344-1352.

Full text
Abstract:
This paper introduces a modified edition of classical Cespedes' load flow method to radial distribution system analysis. In the developed approach, a distribution network is modeled in different complex reference systems and reduced to a set of connected equivalent subnetworks, each without resistance, while graph topology and node voltage solution are preserved. Active power losses are then not dissipated in the modeled subnetworks and active power flows can be obtained as a consequence of radiality. Thus, the proposed method preprocesses a series of variable transformations concomitant to an iterative algorithm using a forward-backward sweep to arrive at the load flow solution. The proposed approach has been tested using literature and actual distribution networks, and efficiency improvements are verified in comparison to Cespedes' load flow method.
APA, Harvard, Vancouver, ISO, and other styles
14

Piao, Zai Lin, Lu Wang, Juan Wang, and Yong Xiang Wang. "The Research of the Real-Time Performance of Power Flow Visualization Based on Digital Power Distribution Network." Advanced Materials Research 791-793 (September 2013): 1884–88. http://dx.doi.org/10.4028/www.scientific.net/amr.791-793.1884.

Full text
Abstract:
Based on the study of 10 kV digital power distribution network (DPDN) power flow visualization, the paper uses hierarchical backward and forward sweep algorithm (HBAFSA) to significantly shorten the calculation time and improve the real-time performance of power flow, which analysis and layers the distribution network topology according to the breadth-first search and then calculate in parallel between the same level. Programming with Visual C# in Visual Studio 2010 environment gets the GIS data library to actively obtain real-time operating data of distribution network from the SCADA data library, and calculates rapidly with the HBAFSA, and transfers the real-time power flow data to the GIS data library. On the platform of the GIS, clicking nodes and branches can get the visualized real-time power flow, which indicates the achievement of the real-time power flow of the DPDN visualization on the platform of the GIS.
APA, Harvard, Vancouver, ISO, and other styles
15

Eminoglu, Ulas, and M. Hakan Hocaoglu. "Three-Phase Transformer and Voltage Regulator Modelling for Forward/Backward Sweep-Based Distribution System Power Flow Algorithms." International Journal of Electrical Engineering & Education 46, no. 1 (2009): 30–46. http://dx.doi.org/10.7227/ijeee.46.1.3.

Full text
APA, Harvard, Vancouver, ISO, and other styles
16

Petridis, Stefanos, Orestis Blanas, Dimitrios Rakopoulos, Fotis Stergiopoulos, Nikos Nikolopoulos, and Spyros Voutetakis. "An Efficient Backward/Forward Sweep Algorithm for Power Flow Analysis through a Novel Tree-Like Structure for Unbalanced Distribution Networks." Energies 14, no. 4 (2021): 897. http://dx.doi.org/10.3390/en14040897.

Full text
Abstract:
The increase of distributed energy resources (DERs) in low voltage (LV) distribution networks requires the ability to perform an accurate power flow analysis (PFA) in unbalanced systems. The characteristics of a well performing power flow algorithm are the production of accurate results, robustness and quick convergence. The current study proposes an improvement to an already used backward-forward sweep (BFS) power flow algorithm for unbalanced three-phase distribution networks. The proposed power flow algorithm can be implemented in large systems producing accurate results in a small amount of time using as little computational resources as possible. In this version of the algorithm, the network is represented in a tree-like structure, instead of an incidence matrix, avoiding the use of redundant computations and the storing of unnecessary data. An implementation of the method was developed in Python programming language and tested for 3 IEEE feeder test cases (the 4 bus feeder, the 13 bus feeder and the European Low Voltage test feeder), ranging from a low (4) to a very high (907) buses number, while including a wide variety of components witnessed in LV distribution networks.
APA, Harvard, Vancouver, ISO, and other styles
17

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.

Full text
Abstract:
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 of power-flow programming in distribution system analysis. Two classical test feeders comprising 33 and 69 nodes are used to validate the proposed formulation in comparison with conventional methods such as the Gauss–Seidel and Newton–Raphson power-flow formulations.
APA, Harvard, Vancouver, ISO, and other styles
18

Gianto, Rudy, and Purwoharjono Purwoharjono. "A new method to incorporate three-phase power transformer model into distribution system load flow analysis." International Journal of Applied Power Engineering (IJAPE) 10, no. 3 (2021): 262. http://dx.doi.org/10.11591/ijape.v10.i3.pp262-270.

Full text
Abstract:
This paper proposes a new and simple method to incorporate three-phase power transformer model into distribution system load flow (DSLF) analysis. The objective of the present work is to find a robust and efficient technique for modeling and integrating power transformer in the DSLF analysis. The proposed transformer model is derived based on nodal admittance matrix and formulated by using the symmetrical component theory. Load flow formulation in terms of branch currents and nodal voltages is also proposed in this paper to enable integrating the model into the DSLF analysis. Singularity that makes the calculations in forward/backward sweep (FBS) algorithm is difficult to be carried out. It can be avoided in the method. The proposed model is verified by using the standard IEEE test system.
APA, Harvard, Vancouver, ISO, and other styles
19

Wang, Z., F. Chen, and J. Li. "Implementing Transformer Nodal Admittance Matrices Into Backward/Forward Sweep-Based Power Flow Analysis for Unbalanced Radial Distribution Systems." IEEE Transactions on Power Systems 19, no. 4 (2004): 1831–36. http://dx.doi.org/10.1109/tpwrs.2004.835659.

Full text
APA, Harvard, Vancouver, ISO, and other styles
20

Diaz, Guzman, Javier Gomez-Aleixandre, and Jose Coto. "Direct Backward/Forward Sweep Algorithm for Solving Load Power Flows in AC Droop-Regulated Microgrids." IEEE Transactions on Smart Grid 7, no. 5 (2016): 2208–17. http://dx.doi.org/10.1109/tsg.2015.2478278.

Full text
APA, Harvard, Vancouver, ISO, and other styles
21

Archundia-Aranda, I., and R. O. Mota-Palomino. "Harmonic Penetration Method for Radial Distribution Networks." International Journal of Emerging Electric Power Systems 15, no. 2 (2014): 111–17. http://dx.doi.org/10.1515/ijeeps-2013-0093.

Full text
Abstract:
Abstract This work presents a method for calculating harmonic voltages and currents in radial distribution networks. The proposed method is an extension of the backward/forward sweep method for load flow studies in distribution systems and as such preserves its good convergence characteristics besides of not requiring of any network matrix. The method was tested on an eight-node one-phase radial test feeder and results were similar to those that were obtained by the well-known current injection method. Also it was tested on a 2000-node network, showing this way that this is a more suitable method for large three-phase radial distribution networks.
APA, Harvard, Vancouver, ISO, and other styles
22

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.

Full text
Abstract:
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 methods is compared with the conventional Newton Raphson load flow method. The standard 33-bus distribution system has been transformed into an autonomous microgrid and used for evaluation of the proposed load flow methodologies. Matlab coding has been developed for validating the results.
APA, Harvard, Vancouver, ISO, and other styles
23

Grisales-Noreña, L. F., O. D. Garzon-Rivera, C. A. Ramírez-Vanegas, O. D. Montoya, and C. A. Ramos-Paja. "Application of the backward/forward sweep method for solving the power flow problem in DC networks with radial structure." Journal of Physics: Conference Series 1448 (January 2020): 012012. http://dx.doi.org/10.1088/1742-6596/1448/1/012012.

Full text
APA, Harvard, Vancouver, ISO, and other styles
24

Abdel-Akher, Mamdouh. "Voltage stability analysis of unbalanced distribution systems using backward/forward sweep load-flow analysis method with secant predictor." IET Generation, Transmission & Distribution 7, no. 3 (2013): 309–17. http://dx.doi.org/10.1049/iet-gtd.2012.0360.

Full text
APA, Harvard, Vancouver, ISO, and other styles
25

Injeti, Satish Kumar, and Thunuguntla Vinod Kumar. "A WDO Framework for Optimal Deployment of DGs and DSCs in a Radial Distribution System Under Daily Load Pattern to Improve Techno-Economic Benefits." International Journal of Energy Optimization and Engineering 7, no. 2 (2018): 1–38. http://dx.doi.org/10.4018/ijeoe.2018040101.

Full text
Abstract:
This article presents a methodology to determine optimal locations and sizes of DGs (Distributed Generator) and DSCs (D-STATCOM) simultaneously in a radial distribution network during a daily load pattern to improve the techno-economic benefits. An effective weighted objective function has been designed to address daily power loss minimization of the three techno-economic benefits, improvement of daily voltage profile and maximization of net annual savings due to the placement of DGs and DSCs. A repetitive backward-forward sweep based load flow has been used to calculate the daily power loss and bus voltages. To optimize the designed objective function, an efficient and simple nature-inspired wind driven optimization (WDO) algorithm has been used. To validate the effectiveness of the proposed methodology, different scenarios are considered and a detailed outcome analysis is presented.
APA, Harvard, Vancouver, ISO, and other styles
26

Taher, Seyed Abbas, and Seyed Ahmadreza Afsari. "Optimal Location and Sizing of UPQC in Distribution Networks Using Differential Evolution Algorithm." Mathematical Problems in Engineering 2012 (2012): 1–20. http://dx.doi.org/10.1155/2012/838629.

Full text
Abstract:
Differential evolution (DE) algorithm is used to determine optimal location of unified power quality conditioner (UPQC) considering its size in the radial distribution systems. The problem is formulated to find the optimum location of UPQC based on an objective function (OF) defined for improving of voltage and current profiles, reducing power loss and minimizing the investment costs considering the OF's weighting factors. Hence, a steady-state model of UPQC is derived to set in forward/backward sweep load flow. Studies are performed on two IEEE 33-bus and 69-bus standard distribution networks. Accuracy was evaluated by reapplying the procedures using both genetic (GA) and immune algorithms (IA). Comparative results indicate that DE is capable of offering a nearer global optimal in minimizing the OF and reaching all the desired conditions than GA and IA.
APA, Harvard, Vancouver, ISO, and other styles
27

Kongjeen, Y., K. Bhumkittipich, N. Mithulananthan, I. S. Amiri, and P. Yupapin. "A modified backward and forward sweep method for microgrid load flow analysis under different electric vehicle load mathematical models." Electric Power Systems Research 168 (March 2019): 46–54. http://dx.doi.org/10.1016/j.epsr.2018.10.031.

Full text
APA, Harvard, Vancouver, ISO, and other styles
28

Ju, Yuntao, Wenchuan Wu, and Boming Zhang. "Convergence problem in forward/backward sweep power flow method caused by non-positive-sequence impedance of distributed generators and its solution." International Journal of Electrical Power & Energy Systems 65 (February 2015): 463–66. http://dx.doi.org/10.1016/j.ijepes.2014.04.035.

Full text
APA, Harvard, Vancouver, ISO, and other styles
29

Sedaghat, Mohammad, Esmaeel Rokrok, and Mohammad Bakhshipour. "A New DG Allocation Approach Based on Biogeography-Based Optimization with Considering Fuzzy Load Uncertainty." IAES International Journal of Artificial Intelligence (IJ-AI) 4, no. 3 (2015): 89. http://dx.doi.org/10.11591/ijai.v4.i3.pp89-96.

Full text
Abstract:
A new distributed generation placement method based on biogeography-based optimization (BBO) is investigated in this paper. A significant novelty of this study lies in considering fuzzy load uncertainty. For this purpose a fuzzy backward- forward sweep load flow is proposed. The main objectives of this study is minimizing power losses and improving voltage profile. A comparative study between optimal location and sizing under typical load condition and fuzzy load uncertainty is presented. To verify the efficiency of proposed BBO method, it is conducted on IEEE 33 bus distribution system, also a comparative study between proposed BBO approach and particle swarm optimization (PSO), Technical-learning based optimization (TLBO), Artificial bee colony (ABC), Imperialist competitive algorithm (ICA) is investigated. The simulation results show the excellent and superior performance of proposed BBO approach in comparison with the other intelligent methods.
APA, Harvard, Vancouver, ISO, and other styles
30

Pokhrel, Biswas Babu, Ashish Shrestha, Sudip Phuyal, and Shailendra Kumar Jha. "Voltage Profile Improvement of Distribution System via Integration of Distributed Generation Resources." Journal of Renewable Energy, Electrical, and Computer Engineering 1, no. 1 (2021): 33. http://dx.doi.org/10.29103/jreece.v1i1.3519.

Full text
Abstract:
This study attempts to identify the causes and possible solutions for voltage profile issues in the lower land of Nepal, and is specifically focused on Laukahi feeder, a radial distribution system with an approximate length of 65 km and distributed at 11KV system voltage. Currently, the end-users feeding through this feeder are getting extremely poor voltage along with frequent interruptions in the power supply. In this study, a forward/ backward sweep algorithm is used to analyze the load flow of the distribution system, whereas ant colony optimization (ACO) technique is used to identify the best location for the Distributed Generator (DG) penetrations. After completion of this study, it is found that, the branch loss of the feeder can be reduced up to 87.22%, and voltage profile can be improved from 0.828 pu to 0.982 pu by integrating some form of DGs.
APA, Harvard, Vancouver, ISO, and other styles
31

Javid, Zahid, Ulas Karaagac, Ilhan Kocar, and Ka Wing Chan. "Laplacian Matrix-Based Power Flow Formulation for LVDC Grids with Radial and Meshed Configurations." Energies 14, no. 7 (2021): 1866. http://dx.doi.org/10.3390/en14071866.

Full text
Abstract:
There is an increasing interest in low voltage direct current (LVDC) distribution grids due to advancements in power electronics enabling efficient and economical electrical networks in the DC paradigm. Power flow equations in LVDC grids are non-linear and non-convex due to the presence of constant power nodes. Depending on the implementation, power flow equations may lead to more than one solution and unrealistic solutions; therefore, the uniqueness of the solution should not be taken for granted. This paper proposes a new power flow solver based on a graph theory for LVDC grids having radial or meshed configurations. The solver provides a unique solution. Two test feeders composed of 33 nodes and 69 nodes are considered to validate the effectiveness of the proposed method. The proposed method is compared with a fixed-point methodology called direct load flow (DLF) having a mathematical formulation equivalent to a backward forward sweep (BFS) class of solvers in the case of radial distribution networks but that can handle meshed networks more easily thanks to the use of connectivity matrices. In addition, the convergence and uniqueness of the solution is demonstrated using a Banach fixed-point theorem. The performance of the proposed method is tested for different loading conditions. The results show that the proposed method is robust and has fast convergence characteristics even with high loading conditions. All simulations are carried out in MATLAB 2020b software.
APA, Harvard, Vancouver, ISO, and other styles
32

Bouketir, Omrane, Haddi Sebaa, and Tarek Bouktir. "Optimal Integration of Distributed Generation in a Radial Distribution System Using BW/FW Sweep and PSO Algorithm." Advanced Engineering Forum 35 (February 2020): 94–101. http://dx.doi.org/10.4028/www.scientific.net/aef.35.94.

Full text
Abstract:
Installation of distributed generations (DGs) could be an effective solution to the problem of shortage of the electric energy especially in populated areas. Installation of DG in non-suitable places can result in more energy losses and voltage instability which leads to higher operating cost. DGs should be placed optimally in the network to get maximum efficiency of the system. This paper presents a new method to solve the optimal sizing and placement of DGs with the aim of minimizing real power loss and improving voltage profile in a distribution system. A power flow technique based on Backward/Forward (BW/FW) sweep is used to calculate the system losses through different branches. Particle Swarm Optimization algorithm is used to find out the optimal size and to identify the DG units placement in a radial distribution system simultaneously. Different scenarios of DG capacity are considered. The constraints of voltage and current through branches are investigated. The method is tested on 33-bus and 69-bus radial distribution systems to demonstrate the performance and the effectiveness of the proposed method. The results obtained are discussed and analyzed where they proved the usefulness of the applied algorithm.
APA, Harvard, Vancouver, ISO, and other styles
33

Radwan, Ali A., Ahmed A. Zaki Diab, Abo-Hashima M. Elsayed, Hassan Haes Alhelou, and Pierluigi Siano. "Active Distribution Network Modeling for Enhancing Sustainable Power System Performance; a Case Study in Egypt." Sustainability 12, no. 21 (2020): 8991. http://dx.doi.org/10.3390/su12218991.

Full text
Abstract:
The remarkable growth of distributed generation (DG) penetration inside electrical power systems turns the familiar passive distribution networks (PDNs) into active distribution networks (ADNs). Based on the backward/forward sweep method (BFS), a new power-flow algorithm was developed in this paper. The algorithm is flexible to handle the bidirectional flow of power that characterizes the modern ADNs. Models of the commonly used distribution network components were integrated with the developed algorithm to form a comprehensive tool. This tool is valid for modeling either balanced or unbalanced ADNs with an unlimited number of nodes or laterals. The integrated models involve modeling of distribution lines, losses inside distribution transformers, automatic voltage regulators (AVRs), DG units, shunt capacitor banks (SCBs) and different load models. To verify its validity, the presented algorithm was first applied to the unbalanced IEEE 37-node standard feeder in both passive and active states. Moreover, the algorithm was then applied to a balanced 22 kV real distribution network as a case study. The selected network is located in a remote area in the western desert of Upper Egypt, far away from the Egyptian unified national grid. Accordingly, the paper examines the current and future situation of the Egyptian electricity market. Comparison studies between the performance of the proposed ADNs and the classical PDNs are discussed. Simulation results are presented to demonstrate the effectiveness of the proposed ADNs in preserving the network assets, improving the system performance and minimizing the power losses.
APA, Harvard, Vancouver, ISO, and other styles
34

Kaliaperumal Rukmani, Devabalaji, Yuvaraj Thangaraj, Umashankar Subramaniam, et al. "A New Approach to Optimal Location and Sizing of DSTATCOM in Radial Distribution Networks Using Bio-Inspired Cuckoo Search Algorithm." Energies 13, no. 18 (2020): 4615. http://dx.doi.org/10.3390/en13184615.

Full text
Abstract:
This article proposes a new approach based on a bio-inspired Cuckoo Search Algorithm (CSA) that can significantly envisage with several issues for optimal allocation of distribution static compensator (DSTATCOM) in Radial Distribution System (RDS). In the proposed method, optimal locations of the DSTATCOM are calculated by using the Loss Sensitivity Factor (LSF). The optimal size of the DSTATCOM is simulated by using the newly developed CSA. In the proposed method, load flow calculations are performed by using a fast and efficient backward/forward sweep algorithm. Here, the mathematically formed objective function of the proposed method is to reduce the total system power losses. Standard 33-bus and 69-bus systems have been used to show the effectiveness of the proposed CSA-based optimization method in the RDS with different load models. The simulated results confirm that the optimal allocation of DSTATCOM plays a significant role in power loss minimization and enhanced voltage profile. The placement of DSTATCOM in RDS also plan an important role for minimizing uncertainties in the distribution level. The proposed method encourages one to use renewable-based resources, which results in affordable and clean energy.
APA, Harvard, Vancouver, ISO, and other styles
35

Lin, Wei-Chen, Wei-Tzer Huang, Kai-Chao Yao, Hong-Ting Chen, and Chun-Chiang Ma. "Fault Location and Restoration of Microgrids via Particle Swarm Optimization." Applied Sciences 11, no. 15 (2021): 7036. http://dx.doi.org/10.3390/app11157036.

Full text
Abstract:
This aim of this work was to develop an integrated fault location and restoration approach for microgrids (MGs). The work contains two parts. Part I presents the fault location algorithm, and Part II shows the restoration algorithm. The proposed algorithms are implemented by particle swarm optimization (PSO). The fault location algorithm is based on network connection matrices, which are the modifications of bus-injection to branch-current and branch-current to bus-voltage (BCBV) matrices, to form the new system topology. The backward/forward sweep approach is used for the prefault power flow analysis. After the occurrence of a fault, the voltage variation at each bus is calculated by using the Zbus modification algorithm to modify Zbus. Subsequently, the voltage error matrix is computed to search for the fault section by using PSO. After the allocation of the fault section, the multi-objective function is implemented by PSO for optimal restoration with its constraints. Finally, the IEEE 37-bus test system connected to distributed generations was utilized as the sample system for a series simulation and analysis. The outcomes demonstrated that the proposed optimal algorithm can effectively solve fault location and restoration problems in MGs.
APA, Harvard, Vancouver, ISO, and other styles
36

Rezaeimozafar, Mostafa, Mohsen Eskandari, Mohammad Hadi Amini, Mohammad Hasan Moradi, and Pierluigi Siano. "A Bi-Layer Multi-Objective Techno-Economical Optimization Model for Optimal Integration of Distributed Energy Resources into Smart/Micro Grids." Energies 13, no. 7 (2020): 1706. http://dx.doi.org/10.3390/en13071706.

Full text
Abstract:
The energy management system is executed in microgrids for optimal integration of distributed energy resources (DERs) into the power distribution grids. To this end, various strategies have been more focused on cost reduction, whereas effectively both economic and technical indices/factors have to be considered simultaneously. Therefore, in this paper, a two-layer optimization model is proposed to minimize the operation costs, voltage fluctuations, and power losses of smart microgrids. In the outer-layer, the size and capacity of DERs including renewable energy sources (RES), electric vehicles (EV) charging stations and energy storage systems (ESS), are obtained simultaneously. The inner-layer corresponds to the scheduled operation of EVs and ESSs using an integrated coordination model (ICM). The ICM is a fuzzy interface that has been adopted to address the multi-objectivity of the cost function developed based on hourly demand response, state of charges of EVs and ESS, and electricity price. Demand response is implemented in the ICM to investigate the effect of time-of-use electricity prices on optimal energy management. To solve the optimization problem and load-flow equations, hybrid genetic algorithm (GA)-particle swarm optimization (PSO) and backward-forward sweep algorithms are deployed, respectively. One-day simulation results confirm that the proposed model can reduce the power loss, voltage fluctuations and electricity supply cost by 51%, 40.77%, and 55.21%, respectively, which can considerably improve power system stability and energy efficiency.
APA, Harvard, Vancouver, ISO, and other styles
37

Ali, Eman S., Ragab A. El-Sehiemy, Adel A. Abou El-Ela, Karar Mahmoud, Matti Lehtonen, and Mohamed M. F. Darwish. "An Effective Bi-Stage Method for Renewable Energy Sources Integration into Unbalanced Distribution Systems Considering Uncertainty." Processes 9, no. 3 (2021): 471. http://dx.doi.org/10.3390/pr9030471.

Full text
Abstract:
The output generations of renewable energy sources (RES) depend basically on climatic conditions, which are the main reason for their uncertain nature. As a result, the performance and security of distribution systems can be significantly worsened with high RES penetration. To address these issues, an analytical study was carried out by considering different penetration strategies for RES in the radial distribution system. Moreover, a bi-stage procedure was proposed for optimal planning of RES penetration. The first stage was concerned with calculating the optimal RES locations and sites. This stage aimed to minimize the voltage variations in the distribution system. In turn, the second stage was concerned with obtaining the optimal setting of the voltage control devices to improve the voltage profile. The multi-objective cat swarm optimization (MO-CSO) algorithm was proposed to solve the bi-stages optimization problems for enhancing the distribution system performance. Furthermore, the impact of the RES penetration level and their uncertainty on a distribution system voltage were studied. The proposed method was tested on the IEEE 34-bus unbalanced distribution test system, which was analyzed using backward/forward sweep power flow for unbalanced radial distribution systems. The proposed method provided satisfactory results for increasing the penetration level of RES in unbalanced distribution networks.
APA, Harvard, Vancouver, ISO, and other styles
38

Pancha, Basanta, Rajendra Shrestha, and Ajay Kumar Jha. "Optimal Integration of Distributed Generation in Distribution System: A Case Study of Sallaghari Feeder from Thimi Switching Station, Bhaktapur, Nepal." Journal of the Institute of Engineering 15, no. 1 (2020): 242–49. http://dx.doi.org/10.3126/jie.v15i1.27741.

Full text
Abstract:
The modern power distribution network is constantly being faced with an ever-growing load demand resulting into increased burden and reduced voltage, which leads to find alternative source of energy to meet it. In Nepal, the electricity supply is based on hydropower primarily, which are situated very far from load centers and hence the generated power are to be transmitted through transmission and distributed system. Among the systems, radial distribution system is popular because of low cost and simple design, but it has power quality issues like low voltage profile and higher loss. In response to the problem of increased load demand, efforts have been made to decentralize this infrastructure through the use of distributed generators. However, the improper sizing and placement of DG unit may lead to higher power loss and power instability. The optimization problem of DG unit placement and its capacity determination were performed in this research. The study has been carried out for Thimi-Sallaghari Feeder and this feeder has low voltage profile and higher power loss. The IEEE 33 bus test system was examined as a test case to demonstrate the effectiveness of the proposed approach. The study has been carried out in MATLAB using “Backward and Forward Sweep Method” for load flow analysis and Genetic Algorithm for optimization. The number of DG unit of different size integrated was varied from one to ten. The result of this study showed that the voltage at minimum voltage node, maximum active and reactive loss reduction of Thimi-Sallaghari feeder have been improved by 3.69% (from 0.942 p.u. to 0.976 p.u), 75.88 % and 75.88 % respectively with placement of DG units at three bus locations of total 658.2019 kW and 395.873 kVAR capacity. Likewise, the voltage at minimum voltage node, maximum active and reactive loss of IEEE- 33 bus system have been improved by 6.88 %, 90.11% and 89.9% respectively with placement of DG units of total 2215.488 kW and 1176.059 kVAR at 6 different locations of the network.
APA, Harvard, Vancouver, ISO, and other styles
39

Hameed, Faisal, Mohamed Al Hosani, and H. H. Zeineldin. "A Modified Backward/Forward Sweep Load Flow Method for Islanded Radial Microgrids." IEEE Transactions on Smart Grid 10, no. 1 (2019): 910–18. http://dx.doi.org/10.1109/tsg.2017.2754551.

Full text
APA, Harvard, Vancouver, ISO, and other styles
40

Augugliaro, A., L. Dusonchet, S. Favuzza, M. G. Ippolito, and E. Riva Sanseverino. "A backward sweep method for power flow solution in distribution networks." International Journal of Electrical Power & Energy Systems 32, no. 4 (2010): 271–80. http://dx.doi.org/10.1016/j.ijepes.2009.09.007.

Full text
APA, Harvard, Vancouver, ISO, and other styles
41

Issicaba, Diego, and Jorge Coelho. "Evaluation of the Forward-Backward Sweep Load Flow Method using the Contraction Mapping Principle." International Journal of Electrical and Computer Engineering (IJECE) 6, no. 6 (2016): 3229. http://dx.doi.org/10.11591/ijece.v6i6.11303.

Full text
Abstract:
<p>This paper presents an assessment of the forward-backward sweep load flow method to distribution system analysis. The method is formally assessed using fixed-point concepts and the contraction mapping theorem. The existence and uniqueness of the load flow feasible solution is supported by an alternative argument from those obtained in the literature. Also, the closed-form of the convergence rate of the method is deduced and the convergence dependence of loading is assessed. Finally, boundaries for error values per iteration between iterates and feasible solution are obtained. Theoretical results have been tested in several numerical simulations, some of them presented in this paper, thus fostering discussions about applications and future works.</p>
APA, Harvard, Vancouver, ISO, and other styles
42

Issicaba, Diego, and Jorge Coelho. "Evaluation of the Forward-Backward Sweep Load Flow Method using the Contraction Mapping Principle." International Journal of Electrical and Computer Engineering (IJECE) 6, no. 6 (2016): 3229. http://dx.doi.org/10.11591/ijece.v6i6.pp3229-3237.

Full text
Abstract:
<p>This paper presents an assessment of the forward-backward sweep load flow method to distribution system analysis. The method is formally assessed using fixed-point concepts and the contraction mapping theorem. The existence and uniqueness of the load flow feasible solution is supported by an alternative argument from those obtained in the literature. Also, the closed-form of the convergence rate of the method is deduced and the convergence dependence of loading is assessed. Finally, boundaries for error values per iteration between iterates and feasible solution are obtained. Theoretical results have been tested in several numerical simulations, some of them presented in this paper, thus fostering discussions about applications and future works.</p>
APA, Harvard, Vancouver, ISO, and other styles
43

Shan, Peng. "Kinematic Analysis of 3-D Swept Shock Surfaces in Axial Flow Compressors." Journal of Turbomachinery 123, no. 3 (2000): 490–500. http://dx.doi.org/10.1115/1.1370159.

Full text
Abstract:
This paper is part II of a comprehensive study on the blade leading edge sweep/bend of supersonic and transonic axial compressors. The paper explores and analyzes the kinematic characteristic variables of three-dimensional (3-D) swept shock surfaces. In the research field studying the sweep aerodynamics of axial flow compressors and fans, many types of high loading swept blades are under intensive study. So, in both direct and inverse design methods and experimental validations, an accurate grasp of the sweep characteristic of the blade’s 3-D swept shock surface becomes of more concern than before. Associated with relevant blading variables, this paper studies the forward and zero and backward sweeps of shock surfaces, defines and resolves every kind of useful sweep angle, obtains dimensionless sweep similarity factors, suggests a kind of method for the quantitative classification of 3-D shock structures, and proposes the principle of 3-D shock structure measurements. Two rotor blade leading edge shock surfaces from two high loading single stage fans are analyzed and contrasted. This study is the foundation of the kinematic design of swept shock surfaces.
APA, Harvard, Vancouver, ISO, and other styles
44

Passrucker, H., M. Engber, S. Kablitz, and D. K. Hennecke. "Effect of forward sweep in a transonic compressor rotor." Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy 217, no. 4 (2003): 357–65. http://dx.doi.org/10.1243/095765003322315414.

Full text
Abstract:
This paper presents the design and testing of a transonic compressor rotor with forward sweep. The rotor was used to investigate the influence of forward sweep on the performance and stability of a single-stage transonic compressor compared with a baseline design with radially stacked blade sections. The comparison was done numerically with the three-dimensional Navier—Stokes code TRACE-S and experimentally in the Darmstadt transonic compressor test rig. It was found that the new rotor with forward sweep has an increased efficiency and also a much better stall margin (much more in the rig test than predicted by the three-dimensional Navier—Stokes calculation). Particularly close to stall, the forward sweep diverts the flow towards the blade tip region which helps to stabilise this region. For that reason it is possible to throttle the forward-swept rotor much further than the radially stacked rotor, although the forward-swept rotor does already suffer from separated flow in the hub.
APA, Harvard, Vancouver, ISO, and other styles
45

anoj Gupta, Chitransh Shrivastava, M. "Review of Forward & Backward Sweep Method for Load Flow Analysis of Radial Distribution System." International Journal of Advanced Research in Electrical, Electronics and Instrumentation Engineering 04, no. 06 (2015): 5595–99. http://dx.doi.org/10.15662/ijareeie.2015.0406049.

Full text
APA, Harvard, Vancouver, ISO, and other styles
46

Siahaan, Yokhebert Natasya, Samuel Samuel, and Berlian Arswendo Adietya. "Analisa Bentuk Foil pada Kapal Hydrofoil Supported-Catamaran (Hysucat)." Jurnal Rekayasa Hijau 4, no. 3 (2020): 145–56. http://dx.doi.org/10.26760/jrh.v4i3.145-156.

Full text
Abstract:
ABSTRAKKapal katamaran yang terintegrasi dengan foil bertujuan untuk menghasilkan performance lebih baik. Hydrofoil Supported-Catamaran (Hysucat) merupakan kapal katamaran yang dirancang untuk kecepatan tinggi menggunakan foil. Penelitian ini dilakukan dengan pendekatan metode numerik untuk mempresentasikan aliran fluida menggunakan RANS (Reynolds-Averaged Navier-Stokes). Aliran fluida pada penelitian ini menggunakan dua fasa yaitu air dan udara untuk menganalisis hambatan dan gaya angkat kapal katamaran yang telah dimodifikasi menjadi hysucat. Hysucat pada penelitian ini dibedakan oleh tiga macam bentuk foil yaitu lurus, sweep belakang dan sweep depan dengan tambahan variasi pada chord line dan sudut serang foil. Penambahan foil pada penelitian ini memberikan informasi bahwa hysucat dengan bentuk foil sweep belakang chord line 1.2 dan AOA(sudut serang) 0º mengurangi hambatan kapal sebesar 21% dari hambatan kapal katamaran tanpa foil. Gaya angkat tertinggi dihasilkan hysucat dengan bentuk foil sweep belakang chord line 1 dan AOA (sudut serang) 0º sehingga bentuk foil yang direkomendasikan untuk digunakan adalah sweep belakang.Kata kunci: hysucat, hambatan, gaya angkat, foil, CFDABSTRACTCatamaran hull-form using foil aims to produce better performance. Hydrofoil Supported-Catamaran (Hysucat) is a catamaran which is designed for high-speed craft using foil. This research was conducted with a numerical method approach to present fluid flow using RANS (Reynolds-Averaged Navier-Stokes). The numerical method uses two phases, namely water phase, and air phase to analyze catamaran hull-form, which have been modified being hysucat. Hysucat is distinguished by three types of foil form namely straight foil, backward sweep foil, and forward sweep foil with additional variations in chord line and angle of attack (AOA). The addition of foil in this study provides information that hysucat with backward foil, chord line 1.2, and AOA 0º reduce ship resistance by 21% from catamaran resistance without foil. The highest lift force is produced by hysucat with backward foil, chord line 1 and AOA 0º so that foil form which is recommended to be used is backward sweep foil.Keywords: hysucat, resistance, lift force, foil, CFD
APA, Harvard, Vancouver, ISO, and other styles
47

Kodama, H., and M. Namba. "Unsteady Lifting Surface Theory for a Rotating Cascade of Swept Blades." Journal of Turbomachinery 112, no. 3 (1990): 411–17. http://dx.doi.org/10.1115/1.2927675.

Full text
Abstract:
A lifting surface theory is developed to predict the unsteady three-dimensional aerodynamic characteristics for a rotating subsonic annular cascade of swept blades. A discrete element method is used to solve the integral equation for the unsteady blade loading. Numerical examples are presented to demonstrate effects of the sweep on the blade flutter and on the acoustic field generated by interaction of rotating blades with a convected sinusoidal gust. It is found that increasing the sweep results in decrease of the aerodynamic work on vibrating blades and also remarkable reduction of the modal acoustic power of lower radial orders for both forward and backward sweeps.
APA, Harvard, Vancouver, ISO, and other styles
48

Araujo, Leandro Ramos de, Débora Rosana Ribeiro Penido, Sandoval Carneiro Júnior, José Luiz Rezende Pereira, and Paulo Augusto Nepomuceno Garcia. "Comparisons between the three-phase current injection method and the forward/backward sweep method." International Journal of Electrical Power & Energy Systems 32, no. 7 (2010): 825–33. http://dx.doi.org/10.1016/j.ijepes.2010.01.020.

Full text
APA, Harvard, Vancouver, ISO, and other styles
49

Bompard, E., E. Carpaneto, G. Chicco, and R. Napoli. "Convergence of the backward/forward sweep method for the load-flow analysis of radial distribution systems." International Journal of Electrical Power & Energy Systems 22, no. 7 (2000): 521–30. http://dx.doi.org/10.1016/s0142-0615(00)00009-0.

Full text
APA, Harvard, Vancouver, ISO, and other styles
50

Suyanto, Suyanto, Citra Rahmadhani, Ontoseno Penangsang, and Adi Soeprijanto. "Power-Flow Development Based on the Modified Backward-Forward for Voltage Profile Improvement of Distribution System." International Journal of Electrical and Computer Engineering (IJECE) 6, no. 5 (2016): 2005. http://dx.doi.org/10.11591/ijece.v6i5.10648.

Full text
Abstract:
<p>Unbalanced three-phase radial distribution system has a complex problem in power system. It has many branches and it is sometimes voltage profile’s not stable at every end branches. For improvement of voltage profile, it can be performed by penetrating of a distributed generation models. Information of voltage profile can be gained by study of power flow. The Modified Backward-Forward is one of the most widely used methods of development of power flow and has been extensively used for voltage profile analysis. In this paper, a study of power flow based on the Modified Backward-Forward method was used to capture the complexities of unbalanced three phase radial distribution system in the 20 kV distribution network in North Surabaya city, East Java, Indonesia within considering distributed generation models. In summary, for the informants in this study, the Modified Backward-Forward method has had quickly convergence and it’s just needed 3 to 5 iteration of power flow simulation which’s compared to other power flow development methods. Distributed Generation models in the modified the modified 34 BUS IEEE system and 20 kV distribution network has gained voltage profile value on limited range. One of the more significant findings to emerge from this development is that the Modified Backward-Forward method has average of error voltage about 0.0017 % to 0.1749%.</p>
APA, Harvard, Vancouver, ISO, and other styles
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography