The flow of active and reactive power is known as load flow or power flow. In a power system, power flows from generating station to the load through different branches of the network. Load Flow, Bus, Gauss-Seidel, Newton-Raphson, Fast Decoupled, Voltage Magnitude, Voltage Angle, Active Power, Reactive Power, Iteration, Convergence The compared results show that Newton-Raphson is the most reliable method because it has the least number of iteration and converges faster. The simulation results were compared for number of iteration, computational time, tolerance value and convergence. Simulation is carried out using Matlab for test cases of IEEE 9-Bus, IEEE 30-Bus and IEEE 57-Bus system. The numerical methods: Gauss-Seidel, Newton-Raphson and Fast Decoupled methods were compared for a power flow analysis solution. This paper presents analysis of the load flow problem in power system planning studies. A power flow analysis method may take a long time and therefore prevent achieving an accurate result to a power flow solution because of continuous changes in power demand and generations. In order to have an efficient operating power system, it is necessary to determine which method is suitable and efficient for the system’s load flow analysis. Load flow is an important tool used by power engineers for planning, to determine the best operation for a power system and exchange of power between utility companies. Received 10 August 2015 accepted 27 September 2015 published 30 September 2015 This work is licensed under the Creative Commons Attribution International License (CC BY). The flowchart is drawn below for Newton Raphson Method using polar coordinates for load flow solutions.Department of Electrical and Computer Engineering, Prairie View A&M University, Prairie View, USAĮmail: © 2015 by authors and Scientific Research Publishing Inc.
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