Comparative analysis of the convergence characteristics of second-order loadflow methods

Abstract

The second-order loadflow technique defined in rectangular coordinates has become attractive because of the large amount of computation required in the evaluation of polar trigonometric functions in conventional loadflow methods. Seven versions of the second-order loadflow technique are developed and their convergence characteristics and computing times determined with tests carried out on the IEEE 14 and 30 bus networks. It is suggested that the version based on the CRIC approach warrants further developments into optimal power flows and automatic contingency selection algorithms for real-time control.