Статті в журналах: "Fast Decoupled Load Flow (FDLF) Method"

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Kubba, Hassan Abdullah, and Yasser Falah Hassan. "A Real-Time Fuzzy Load Flow and Contingency Analysis Based on Gaussian Distribution System." Journal of Engineering 21, no. 8 (August 1, 2015): 55–70. http://dx.doi.org/10.31026/j.eng.2015.08.04.

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Fuzzy logic is used to solve the load flow and contingency analysis problems, so decreasing computing time and its the best selection instead of the traditional methods. The proposed method is very accurate with outstanding computation time, which made the fuzzy load flow (FLF) suitable for real time application for small- as well as large-scale power systems. In addition that, the FLF efficiently able to solve load flow problem of ill-conditioned power systems and contingency analysis. The FLF method using Gaussian membership function requires less number of iterations and less computing time than that required in the FLF method using triangular membership function. Using sparsity technique for the input Ybus sparse matrix data gives reduction in overall computation time and storage requirements. The performance of the used methods had been tested on two typical test systems being the IEEE 14-bus and 30-bus systems in addition to the 362-bus Iraqi National Grid. All the obtained results under normal operating conditions show that the computation time of the fuzzy Load Flow (FLF) is less than the fast decoupled load flow (FDLF).

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Krishna Praveen, D., ShaikHussain Vali, and Vempalle Rafi. "A Novel Fast Hybrid Frequency Domain Approach for Evaluating Harmonic Power Flow in Electricity Networks." Journal of Physics: Conference Series 2070, no. 1 (November 1, 2021): 012134. http://dx.doi.org/10.1088/1742-6596/2070/1/012134.

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Abstract Ideally, an AC power supply should constantly provide a perfectly sinusoidal voltage signal at every customer location. Nowadays, many power electronic equipment’s are used in industry in seeking higher system reliability and efficiency and more electronic or microprocessor controllers are used in power system to control AC/DC transmission lines or loads. Moreover, the importance of green energy such as wind and solar is continually growing in our societies not only due to environmental concerns but also to resolve the problem of access to electricity in rural areas. As a result of these issues, power quality problems especially generation of harmonics are on the rise in the distribution network. In electrical power system, harmonics have a number of undesirable effects on power system devices as well as on their operation. It therefore becomes imperative for power system engineers to analyse the penetration of harmonics from the various sources into the network which commonly is known as harmonic power flow evaluation. This paper proposed a novel fast hybrid frequency domain approach (FHA) to evaluate the steady state harmonic power flow with discrete harmonic frequency. The proposed method is applied to IEEE – 14 bus, IEEE New England 39 - bus, IEEE – 57 bus and IEEE 118 - bus power system respectively and compared with Newton – Raphson (NR) load flow method and Fast decoupled load flow method (FDLF) and the results validate the accuracy, robustness and authenticity of the proposed method.

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Zheng, Wei, Fang Yang, and Zheng Dao Liu. "Research on Fast Decoupled Load Flow Method of Power System." Applied Mechanics and Materials 740 (March 2015): 438–41. http://dx.doi.org/10.4028/www.scientific.net/amm.740.438.

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The power flow calculation is study the steady-state operation of the power system as basic electrical calculations. It is given the power system network topology, device parameters and determines system health boundary conditions, draw a detailed operating status of the power system through numerical simulation methods, such as voltage amplitude and phase angle on the bus system the power distribution and the power loss. Flow calculation is the power system operation, planning and safety, reliability analysis, is fundamental to the system voltage regulation, network reconfiguration and reactive power optimization must call the function, so the trend has very important significance to calculate the power system.

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4

Popovic, Dragan. "An efficient decoupled power flow control method by use of phase shifting transformers." Facta universitatis - series: Electronics and Energetics 17, no. 1 (2004): 111–19. http://dx.doi.org/10.2298/fuee0401111p.

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This paper presents an efficient fast decoupled power flow control method e.g. method for automatic adjustment of a phase shifting transformers (PST) for specific line flows. The effects of a PST are represented by injection model and the corresponding extension of conventional load flow equations is made. Furthermore, the load flow control by means of PST is modeled by additional equations. For solution of the power flow control problem defined the special fast decoupled procedure is developed. The high numerical efficiency and simplicity of this procedure has been established on the example of real interconnection formed by the power system of Serbia and Montenegro, Romania, Bulgaria, Former Yugoslav Republic of Macedonia, Greece and Albania (Second UCTE synchronous zone).

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NANDA, J., D. P. KOTHARI, and S. C. SRIVASTAVA. "A NOVEL SECOND ORDER FAST DECOUPLED LOAD FLOW METHOD IN POLAR COORDINATES." Electric Machines & Power Systems 14, no. 5 (January 1988): 339–51. http://dx.doi.org/10.1080/07313568808909296.

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Yaseen, Ahmed Y., and Afaneen A. Abbood. "Study of Power System Load Flow Using FPGA and LabVIEW." Engineering and Technology Journal 38, no. 5A (May 25, 2020): 690–97. http://dx.doi.org/10.30684/etj.v38i5a.346.

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The capability to rapidly execute the power flow (PF) calculations permit engineers in assured with stay bigger assured within the dependability, protection, and economical operation of their system within the case of planned or unplanned instrumentality failures. The purpose of this work is to investigate the use of FPGA characteristics to speed up power flow computing time for the on-line monitoring system of a power system. The work comprises which is the development of the Power flow program using the Fast-decoupled method based on FPGA (Field Programmable Gate Array), and LABVIEW (graphical programming environment). The program delivered very satisfactory results to solve a 30-bus test system. These findings suggest that in general that differences between the proposed work and the conventional fast decoupled method are satisfactory. As for the execution time, because the FPGA uses parallel solutions, the performance of the proposed method is faster. Also, the engagement of the FPGA and the LabVIEW program presented an effective monitoring system for observing the power system.

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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 (October 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 considered as a ‘two stage' iterative method. To accredit the proposed method load flow study is carried out in IEEE-30 bus systems.

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SUNDARESH, LAKSHMI, and P. S. NAGENDRA RAO. "Investigation of schemes for incorporating generator Q limits in the fast decoupled load flow method." Sadhana 40, no. 4 (June 2015): 1155–68. http://dx.doi.org/10.1007/s12046-015-0372-8.

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9

Popovic, Dragan. "An advanced method for active power flow control in electric power interconnections." Facta universitatis - series: Electronics and Energetics 20, no. 2 (2007): 203–13. http://dx.doi.org/10.2298/fuee0702203p.

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This paper presents an advanced method for active power flow control by use of static phase shifting transformer. It is based on non-standard load-flow model, which enables more accurate evaluation of the relevant technical effects of phase shifting transformer installation. For solution of the power flow control problem defined, the special fast decoupled procedure is developed. The high numerical efficiency and simplicity of this procedure has been established on the example of real interconnection formed by the Electric Power System of Serbia and Montenegro, Romania, Bulgaria, Former Yugoslav Republic of Macedonia, Greece and Albania (ex Second UCTE synchronous zone).

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10

Chowdhury, Amit Kumar, Surajit Mondal, Mainak Mukherjee, and Pabitra Kumar Biswas. "Mega Watt Security Assessment of Power Systems." International Letters of Chemistry, Physics and Astronomy 58 (September 2015): 9–15. http://dx.doi.org/10.18052/www.scipress.com/ilcpa.58.9.

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This paper deals with the security aspects of power system by evaluating the severity of transmission line outage. MW security assessment is made by determining the power flow in the line using load flow for each contingency. The severity of contingency is measured using a scalar index called performance index (PI). DC load flow and Fast Decoupled load flow are used as approximate and exact load flow methods for MW security assessment respectively. Contingency analysis is carried out and ranked lists in the decreasing order of severity based on PI values are prepared for standard test systems. The severity of line is evaluated and compared using these load flow methods. A new method is proposed to avoid Masking problems in MW security assessment. Security analysis is made on standard test systems such as 5, 6, IEEE 14 and IEEE 30 bus systems under present study.

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Chowdhury, Amit Kumar, Surajit Mondal, Mainak Mukherjee, and Pabitra Kumar Biswas. "Mega Watt Security Assessment of Power Systems." International Letters of Chemistry, Physics and Astronomy 58 (September 2, 2015): 9–15. http://dx.doi.org/10.56431/p-ycsnwz.

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Анотація:

This paper deals with the security aspects of power system by evaluating the severity of transmission line outage. MW security assessment is made by determining the power flow in the line using load flow for each contingency. The severity of contingency is measured using a scalar index called performance index (PI). DC load flow and Fast Decoupled load flow are used as approximate and exact load flow methods for MW security assessment respectively. Contingency analysis is carried out and ranked lists in the decreasing order of severity based on PI values are prepared for standard test systems. The severity of line is evaluated and compared using these load flow methods. A new method is proposed to avoid Masking problems in MW security assessment. Security analysis is made on standard test systems such as 5, 6, IEEE 14 and IEEE 30 bus systems under present study.

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12

Chakrabarty, Shantanu, Lakshmi Sundaresh, and P. S. Nagendra Rao. "Automatic schemes for including generator Q and transformer tap limits in the fast decoupled load flow method." IET Generation, Transmission & Distribution 13, no. 12 (June 18, 2019): 2533–42. http://dx.doi.org/10.1049/iet-gtd.2018.6462.

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13

Syafii, Syafii, and Hanalde Andre. "Comparative Study of Three Linear System Solver Applied to Fast Decoupled Load Flow Method for Contigency Analysis." JURNAL NASIONAL TEKNIK ELEKTRO 6, no. 1 (March 30, 2017): 25. http://dx.doi.org/10.25077/jnte.v6n1.381.2017.

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14

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 under different loading conditions. In addition, the convergence regions of NR method for power flow equations with different nonlinear load models are also fractal. This fractal property highlights the importance of choosing initial guesses since a small variation of an initial guess near the convergence boundary leads to two different power flow solutions. One vital variation of Newton method popular in power industry is the fast decoupled power flow method whose convergence region is also numerically studied on an IEEE 14-bus test system which is of 22-dimensional in state space.

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Syafii, Syafii, and Hanalde Andre. "Comparative Study of Three Linear System Solver Applied to Fast Decoupled Load Flow Method for Contigency Analysis." JURNAL NASIONAL TEKNIK ELEKTRO 6, no. 1 (March 30, 2017). http://dx.doi.org/10.20449/jnte.v6i1.381.

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16

"Contingency Analysis of Fault and Minimization of Power System Outage using Fuzzy Controller." International Journal of Innovative Technology and Exploring Engineering 9, no. 1 (November 10, 2019): 4111–15. http://dx.doi.org/10.35940/ijitee.a4461.119119.

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In power systems, voltage stability perform the major role in design and its operation. Major system failures are occur due to voltage variability and breakdown. To meet and compensate the rising power demand of regular usage in modern trends, transmission networks are enormously loaded which create the voltage instability. Contingency analysis is a recognized energy managing tool. It calculate the violation in the transmission line. In this paper a computational controller fuzzy system is suggested to handle the transmission line outage and overload in other branch kind of problems in Power system. The efficiency of power transmission system with fuzzy controller is inveterate by computation of various parameters of transmission bus under different loading situations. For the contingency analysis the transmission power flow several methods have been developed. Fast Decoupled load flow program is the effective method which provides a fast and effective solution to the contingency analysis in the transmission system and also it is incorporate with matrix alteration formula which gives additional advantage for the system.

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17

SABO, Alıyu, Kamaluddeen IBRAHIM KANYA, Nazıru SHU'AIBU, Chıgozıe ONYEMA, Ahmed ALIYU, Hadıza TANKO, and Sama'ıla KWASAU. "A Review of State-of-the-Art Techniques for Power Flow Analysis." Journal of Scientific Technology and Engineering Research, March 17, 2023. http://dx.doi.org/10.53525/jster.1233034.

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This paper presents a review of the State-of-the-Art Techniques for Power Flow Analysis (PFA) that are newly proposed. However, some of the existing classical methods for the Power Flow Analysis such as Newton-Raphson method, Gauss-Siedel method, and Fast Decoupled Power Flow Technique were also discussed so as to give a background and a wider view of the improvements recorded so far. From the findings, the State-of-the-Art Techniques such as Particle Swamp Optimization Algorithm for optimal Power Flow Incorporating Wind Farms, Hybrid Firefly and Particle Swamp Optimization Algorithm, Mann Iteration Process Technique for III-Conditioned System, and A New Approach Newton-Raphson Load Flow Analysis in Power System Networks with STATCOM have shown superiority over and above the existing classical methods in terms of accuracy, speed of convergence and overall efficiency. Particularly, there are two newly proposed methods for dc grids: Direct Matrix–Current application (DM-CA) and Direct Matrix-Impedance Approximation (DM-IA) methods that stand out with respect to accuracy, convergence and computational effort which means they can be used for planning, optimization and analysis purposes of practical dc grids.

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Статті в журналах з теми "Fast Decoupled Load Flow (FDLF) Method"

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