Voltage stability analysis of unbalanced distribution systems using backward/forward sweep load‐flow analysis method with secant predictor

• DOI: 10.1049/iet-gtd.2012.0360
• Publication Date: 2013-05-16T12:02:47Z
• Authors: Mamdouh Abdel‐Akher
• Keywords: 0202 electrical engineering, electronic engineering, information engineering; 02 engineering and technology

This study presents a new method for tracing voltage power curves in unbalanced radial distribution systems. The proposed starts with the base case loading conditions and leading to maximum point (MLP) whereas no ill-conditioning problems were detected. calculation is performed by first-order polynomial secant predictor solution corrected using backward/forward power-flow method. Adaptive stepwise control implemented improve overall process reduce number of calculated points along traced curve. results developed are both 33-bus feeder IEEE 13-node IEEE123-node feeders. show that accurately traces up MLP. Comprehensive analysis on scenarios shows load unbalance greatly affects stability limit system.