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Load flow using newton raphson method

Load flow using newton raphson method / Mohd Akhmal Wahid
Sebuah model sistem kuasa elektrik di dalam analisis aliran kuasa terdiri daripada bus dalam sistem, unit penjanaan dan elemen beban yang menghubungkan setiap bus dan penghantaran setiap bus. Keputusan yang penting dalam analisa ialah mengenalpasti magnitud voltan dan sudut fasa setiap bus. Maka daripada maklumat yang diketahui ini, kita boleh mengenalpasti aliran arus, kuasa sebenar dan kuasa reaktif. Selain itu sesuatu sistem memerlukan perancangan operasi, ekonomi adan penukaran tenaga kepada pengguna. Teknik biasa yang selalu digunakan adalah kaedah Newton-Raphson, Gauss- Seidel dan Quasi-Newton. Newton-Raphson adalah kaedah matematik yang lebih berkesan berbanding kaedah Gauss-Seidel. Untuk sistem kuasa yang lebih besar, kaedah Newton-Raphson adalah lebih berkesan dan praktikal. Bilangan iteratif yang diperlukan dalam penyelesaian adalah bergantung kepada saiz sesuatu sistem. Projek ini menunjukkan kaedah Newton-Raphson untuk aliran kuasa. Keputusan IEEE-5 bus sistem digunakan untuk perbandingan. Perisian MATLAB digunakan untuk simulasi. Perbandingan keputusan Hadi Saadat ditunjukkan pada bab 4. _______________________________________________________________________________________________________ The model of the electric power system that is used in a power flow analysis consist of all the busses in the system, the generating units and load elements connected to these various buses, and the transmission lines that interconnected the buses. The information furnished by a power flow analysis is quite simply the voltage profile of the system. In other words, the important result of the analysis is the determination of the voltage magnitude and its associated phase angle at each bus. Of course, once this information is known, it is a routine matter to determine the currents in each transmission link, and accordingly, the real and reactive power flows. Conclusions regarding overloads on any of the system components are obtained at this point in the study. They are necessary for planning operation, economic scheduling and exchange of power between utilities. In addition, power flow analysis is required for many other analyses such as transient stability and contingency studies. The most common techniques used for the iterative solution of nonlinear algebraic equations are Gauss-Seidel, Newton –Raphson, and Quasi-Newton methods. Because of its quadratic convergence, Newton’s method is mathematically superior to the Gauss-Seidel method and is less prone to divergence with ill-conditioned problems. For large power systems, the Newton- Raphson method is found to be more efficient and practical. The number of iterations required to obtain the solution is independent of the system size, but more functional evaluations are required at each iteration. This project presents Newton-Raphson method for conducting load flow. A practical IEEE-5 bus system is considered for illustrator. A software in MATLAB is written and load flow is simulated. The results are compared with the programs written by Hadi Saadat and presented in the Chapter 4.
Contributor(s):
Mohd Akhmal Wahid - Author
Primary Item Type:
Final Year Project
Identifiers:
Accession Number : 875001270
Language:
English
Subject Keywords:
electric; power; busses
First presented to the public:
3/1/2005
Original Publication Date:
9/17/2020
Previously Published By:
Universiti Sains Malaysia
Place Of Publication:
School of Electrical & Electronic Engineering
Citation:
Extents:
Number of Pages - 94
License Grantor / Date Granted:
  / ( View License )
Date Deposited
2020-09-17 16:32:09.285
Submitter:
Mohd Jasnizam Mohd Salleh

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