Open AccessControl scheme of the de‐icing method by the transferred current of bundled conductors and its key parameters
Author(s) -
Jiang Xingliang,
Wang Yaoxuan,
Shu Lichun,
Zhang Zhijin,
Hu Qin,
Wang Quanlin
Publication year - 2015
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.2015.0196
Subject(s) - electrical conductor , icing , key (lock) , current (fluid) , scheme (mathematics) , electrical engineering , computer science , engineering , control theory (sociology) , control (management) , physics , mathematics , meteorology , computer security , artificial intelligence , mathematical analysis
Transferring the current of bundled sub‐conductors through smart switching modules is a promising de‐icing method. This study explores the application of line impedance modulation to line de‐icing. The control requirements of the de‐icing method by transferred current are illustrated according to the characteristics of the method, and two key parameters, namely, critical ice‐melting current and ice‐melting time, are introduced. The analytical expression for the critical ice‐melting current is deduced theoretically. On this basis, the effect of icing shape on the critical ice‐melting current is analysed and discussed, along with the calculation of the critical ice‐melting current when icing on the windward surface of conductor. A simplified method for calculating ice‐melting time is presented on the basis of the heat balance equation during the ice‐melting process. With the control requirements of this method as a framework, the calculation and selection of the grouping mode and current duration for the sub‐conductors are discussed, and the control scheme of the de‐icing method by transferred current is established. The control scheme is preliminarily validated by laboratory investigations conducted in an artificial climate chamber. The results can serve as a reference for obtaining the ice‐melting scheme when de‐icing via the transferred current of bundled conductors.