Abstract:

Conductor selection is critical in the design of UHVDC power transmission project, which should not only meet the requirements of electrical and mechanical performance of transmission lines, also should be economic. The technical economy of conductors with different cross-section (1 000 mm2 and 1 250 mm2) and multiple bundled in ±800 kV and ±1 100 kV DC transmission lines were compared and analyzed, based on the economic calculation method of total life cycle. The analysis results show that the conductor selection is strongly influenced by power loss hour and feed-in-tariff price, so the conductor selection should comprehensively consider all the factors to determine a reasonable conductor scheme.

Key words: ultra high voltage (UHV), DC power transmission lines, large cross-section conductor, total life cycle, economic analysis, conductor selection