Open AccessImproved model for tap‐changing transformer
Author(s) -
Ferreira Carlos Aparecido,
Prada Ricardo Bernardo
Publication year - 2013
Publication title -
iet generation, transmission and distribution
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.92
H-Index - 110
eISSN - 1751-8695
pISSN - 1751-8687
DOI - 10.1049/iet-gtd.2012.0466
Subject(s) - transformer , computer science , tap changer , engineering , electrical engineering , voltage
The model for tap‐changing transformers currently in widespread use consists of an impedance, measured in a short‐circuit test with a nominal tap, in series with an ideal transformer. The use of this model in voltage stability studies leads to qualitatively incorrect results. For demonstration purpose, a small circuit and the concepts of maximum load, equivalent load impedance and voltage control effects are used. An improved model that takes into account laboratory results, circuit laws and voltage stability theory is proposed. Using IEEE test systems, different results are shown for the conventional and proposed models.