Report of feasibility of high phase order transmission

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Abstract
The general feasibility of high phase order (HPO), e.g., 6-phase, power transmission was studied and confirmed. The attendant potential for significant increases in power density efficiencies of rights-of-way is discussed. It is recommended that the next phase in the development of this technology is one of tests and experiments to verify and extend analytical results and define the mechanical characteristics of actual HPO structures and conductor arrays. This includes experimental verification of electric field intensities, corona performance, radio interference, audible noise, television interference, and investigation of the electrical breakdown of closely spaced conductors during impulse. Of primary importance is investigation of mechanical characteristics of HPO structures, insulators, and conductors during motions due to wind, ice conditions, and fault currents. The mechanical aspects are particularly important as HPO arrays may have conductors suspended from, and insulated from, other conductors at different potentials. These investigations will establish the data necessary for preliminary line designs and allow accurate economic studies of HPO variations and comparison with 3-phase (or other) alternatives.

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