PROJECT TITLE :

Control scheme of the de-icing method by the transferred current of bundled conductors and its key parameters

ABSTRACT:

Transferring this of bundled sub-conductors through sensible switching modules may be a promising de-icing methodology. This study explores the application of line impedance modulation to line de-icing. The control requirements of the de-icing methodology by transferred current are illustrated per the characteristics of the tactic, and 2 key parameters, namely, essential ice-melting current and ice-melting time, are introduced. The analytical expression for the essential ice-melting current is deduced theoretically. On this basis, the impact of icing shape on the essential ice-melting current is analysed and discussed, together with the calculation of the vital ice-melting current when icing on the windward surface of conductor. A simplified technique for calculating ice-melting time is presented on the basis of the warmth balance equation throughout the ice-melting process. With the control necessities of this method as a framework, the calculation and choice of the grouping mode and current duration for the sub-conductors are mentioned, and also the control theme of the de-icing technique 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 theme when de-icing via the transferred current of bundled conductors.