Laboratory Development of ± 600 KV DC Pipe Cable System

Final results of a U. S. DOE-sponsored development program for a DC pipe cable system are summarized, providing a basis for optimized design. Long-term performance of DC cable models under accelerated stress provides essential data regarding operating safety factors. Design requirements for optimum performance are discussed in relation to future commercial system applications. Close-to-optimal cable and accessories are recommended for Waltz Mill, based upon laboratory test results and with due cognizance of modern arrestor protective capabilities and system coordination.