The influence of transformers, induction motors and fault resistance regarding propagation voltage sags

• Published in: Ingenieria e Investigacion Vol. 31; no. 2SUP; pp. 139 - 147
• Main Authors: BLANCO, J, LEAL, R, JACOME, J, PETIT, J. F, ORDONEZ, G, BARRERA, V
• Format: Conference Proceeding Journal Article
• Language: English
• Published: Bogota Universidad nacional de Colombia 01.06.2011; Universidad Nacional de Colombia
• Subjects: A.c. Machines; Applied sciences; Electrical engineering. Electrical power engineering; Electrical machines; Electrical power engineering; Exact sciences and technology; Operation. Load control. Reliability; Power networks and lines; Power quality; transformer connection; voltage dip causes; voltage sag propagation; Cable; Electric transformer; transformer connection; Asynchronous motor; Electromagnetic disturbance; Winding; voltage dip causes; Ac motor; Electrical network; Power quality; Induction machine; Power supply quality; Voltage dip; Electric motor; voltage sag propagation
• ISSN: 0120-5609; 2248-8723
• DOI: 10.15446/ing.investig.v31n2SUP.25225

This article presents an analysis of voltage sag propagation. The ATPDraw tool was selected for simulating the IEEE 34 node test feeder. It takes into account both voltage sags caused by electrical fault network, as well as voltage sag propagation characteristics caused by induction motor starting and transformer energising. The analysis was aimed at assessing the influence of transformer winding connections, the impedance of these transformers, lines and cables, summarising the effects on disturbance magnitude and phase. The study shows that the influence of an induction motor on voltage sag propagation results in increased voltage sag severity. Voltage sags caused by induction motor starting and transformer energising have no zero-sequence component, so they are only affected by type 3 transformers. The influence of fault resistance on voltage sag magnitude and phase characteristics is examined and some aspects of interest in characterising these electromagnetic disturbances is identified.