Publication: Analysis of power flow by using pscad and matlab
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Date
2010-04-01
Authors
Sng, Wei Nian
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Abstract
In power engineering, power flow studies, also known as load flow studies, are the backbone of power system analysis and design. The great importance of the power flow studies are the planning, operation, economic scheduling and exchange of power between utilities. The power system of today is a complex interconnected network consists of generation, transmission and sub-transmission, distribution and loads. The load flow problem usually comes with many nonlinear algebraic equations. The power flow computations can also be complicated and challenging due to large number of buses and high complexity of the system. Therefore, computer-aided softwares are applied to give solution to the load flow problems. In this project, the power flow problems are solved by using PSCAD/EMTDC simulation and MATLAB software. The objective of this project is to develop the power flow models using PSCAD schematic layout and solve the load flow problems using both PSCAD simulation and MATLAB software. The results from the PSCAD are compared with the MATLAB results and the percent difference of the results are determined and analysed. The methodology developed in this project involves understanding the theories of power flow analysis, power flow solution using PSCAD simulation and MATLAB software as well as comparison of results obtained. After comparing the outcomes from the three cases, the percent difference of the results between PSCAD and MATLAB is in the range of 0% to 0.13%. Both PSCAD simulation and MATLAB software are capable of handling power flow computations of different power systems with good estimate of results.