Improved newton-raphson with schur complement methods for load flow analysis

Abstract

<p>The determination of power and voltage in the power load flow for the purpose of design and operation of the power system is very crucial in the assessment of actual or predicted generation and load conditions. The load flow studies are of the utmost importance and the analysis has been carried out by computer programming to obtain accurate results within a very short period through a simple and convenient way. In this paper, Newton-Raphson method which is the most common, widely-used and reliable algorithm of load flow analysis is further revised and modified to improve the speed and the simplicity of the algorithm. There are 4 Newton-Raphson algorithms carried out, namely Newton-Raphson, Newton-Raphson constant Jacobian, Newton-Raphson Schur Complement and Newton-Raphson Schur Complement constant Jacobian. All the methods are implemented on IEEE 14-, 30-, 57- and 118-bus system for comparative analysis using MATLAB programming. The simulation results are then compared for assessment using measurement parameter of computation time and convergence rate. Newton-Raphson Schur Complement constant Jacobian requires the shortest computational time.</p>

Modeling of static var compensator-high voltage direct current to provide power and improve voltage profile

“…The Newton-Raphson power flow method is an effective and practical method due to its quadratic convergence and the fact that the number of iterations is independent of the system size and has a high convergence rate [11], [14]. Power transmission capacity is influenced by factors such as thermal constraints, voltage constraints, and limited stability, which leads to dense lines and reduction of security margins and definitive load [8], [12], [15], [16].…”