Bipolar dc transmission research above +- 600 kV at project UHV. Final report

The high-voltage direct-current (HVDC) bipolar research facilities, adapted from existing ac testing facilities at Project UHV, that were constructed to study and to provide future design information for overhead dc transmission lines in the +- 600 to +- 1500-kV range are examined. A description of the new power supply equipment and a study of the requirements of the power supply for flashover tests on HVDC insulators are included.