Selection of Best Conductor Configuration in Double Circuit Extra High Voltage Transmission Lines Considering Electromagnetic Field Effects
Keywords:
Electric fields, Magnetic fields, Extra High Voltage AC Transmission, conductor arrangements, double circuit linesAbstract
A significant rise in the nation’s power demand necessitates the utilization of extra and ultra high voltages in the transmission of power. In order to increase the reliability of power transmission, it is desirable to use a multi-circuit line instead of a single circuit line, until and unless the ground field situations don’t allow it. This research work describes in detail the methodology for selecting the best configuration for double circuit transmission lines, considering the effects of electromagnetic fields. Three phase double circuit transmission lines have various possibilities of arranging the conductors of two circuits, and based on the placement of different phases in two circuits, their performance changes. In this paper, alternative conductor arrangement configurations are evaluated on the basis of the inductance value offered by each individual possible configuration. Minimum electromagnetic interference is desirable while designing the transmission lines. This is to avoid complications with communication lines in proximity and also to avoid corona losses and the harmful effects of radio interference and audible noise. All computations are facilitated by an indigenous tool developed with the help of MATLAB coding, and the results are validated with field measurements.
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