| Currently, at company Hidroserv Râmnicu Vâlcea, the drying of current transformers used in power transformer stations is done by a combination between induction and conduction heating at the frequency of 50 Hz. Obviously, this solution is outdated in terms of technology and the performed energetic analysis proves it. In order to achieve the design of a multifunction static system intended to replace the existing one, so as to respond as best as possible to the specific needs, it is necessary to analyze the drying process from energetic point of view. The knowledge of the equivalent parameters of the loads is needed too. To substantiate the feasibility of this new technical solutions, the goal of the paper is the analysis of the actual technology from energetic point of view. Considering that the current transformer of the 110 kV power station Ciungetu is the typical load, experimental determinations relating to the its drying process have been performed. Two heating coils are used, of 33 turns and 38 turns, respectively. In order to determine the associated parameters for both coils, the current and voltage across the equivalent induc tor have been recorded by using an oscilloscope Tektronix TDS3000. It is obvious, and the performed energetic analysis demonstrates this, the solution currently used is outdated in terms of technology. |
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