ACCURACY OF MATLAB SELF-CODED PROGRAM FOR POWER FLOW ANALYSIS IN COMPARISON WITH STANDARD SOFTWARE PACKAGES

Abstract

Power flow analysis is crucial for power system analysis and design. For these reasons, it is commonly necessary to have different inputs for the program to have different generated results for further analyses. As a basic program, power flow program may be employed by the other programs for evaluating the power system for the given input parameters. The program is therefore required to be interactive or has open connectivity with the other program or may be modified and included as a sub routine in the upper level program. It is unfortunate since the available package programs normally do not provide the aforementioned features. Due to this circumstance, power flow program is normally again constructed using the same programming language, which the main program may utilize. Beside additional effort that may be time consuming, the coded power flow program may still need to be verified to generate accurate results. This paper presents the program for power flow analysis using Newton Raphson method. The program is constructed using Matlab and the generated results are then confirmed with those generated by two standard package program (ETAP and HARMFLOW). The verification is necessary to assure that the generated results are accurate. Since the results of the coded programs may be used for further calculations, the precision of the results will significantly contribute the accuracy of the results of analysis and design. The coded program has been implemented in the IEEE 18-bus standard system and has successfully generated results with acceptable accuracy.