Several examples could be mentioned for critical weather conditions with disastrous effect on overhead transmission lines even from the past few years. The Hungarian high voltage transmission system has already faced such situations: among others the days of 14th March 2013 and 1st December 2014 brought along icing loads, heavy enough to cause months of necessary reconstruction worth over billions of HUF. Additionally, the non-operational lines cause reduced redundancy of the system resulting in lower level of service safety, which could lead to outages as well.
Similar situations could be prevented by developing a new function for the EMS/SCADA System used by the Transmission System Operator. Temporarily increasing loss caused by the current transmitted on the line results in increased conductor temperatures which can prevent mechanical failures of the line by lowering the possibility of ice accretion.
This paper analyses whether this kind of function could be utilized in case of the Hungarian transmission system in terms of feasibility of such overloads - while taking into account the actual condition of the existing infrastructure.