| 摘要 |
A systematic, time-varying current is applied to any number of transmission conductors while the voltage on each remains at an essentially constant level but periodically reversed in polarity. Variations in current, from high to low and from positive to negative, are timed to coordinate with the thermal time constant of the conductor or cable. Current is interrupted on each conductor for a short period around a zero value to allow reversal of voltage. This invention allows full thermal utilization of each conductor in the system while gaining the advantage afforded by sustained DC voltage.
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