Research On The Conductor Selection Of ±800kV High Voltage Direct Current Transmission Line

With the development of national economy and the status quo of China’s energy distribution, long distance, large capacity of the special high-voltage backbone network transmission is an inevitable trend. As an important component of a direct relationship between the transmission line conductor to the line transmission capacity, the electric field distribution along the line, the impact on the environment of electromagnetic affected by force, such as height and construction cost of the tower, so the selection of wire is directly related to a reasonable conclusion transmission line and economy. Especially the transmission line electromagnetic environment more attention from society and limitation, reasonable cable type will be the key to solve this problem.Based Nuozhadu power transmission in Guangdong ±800kV DC transmission line project specific circumstances for ±800kV UHVDC line features, first press China’s current economic situation and the implementation of the current density of conventional lead current carrying capacity of the total cross section of the wire were primaries, References industry standard 《±800kV UHVDC line electromagnetic environment parameter limits》 and 《±800kV DC transmission line design guide》 electromagnetic environmental requirements proposed limits, according to the principle of primaries checking wire screening, a detailed analysis of each wire conductor surface field program, ground field strength and spatial distribution of the ion stream, radio interference, audible noise, corona loss, screened to meet the limit conditions lead program, to meet the requirements of the electromagnetic environment wire type mechanical performance analysis screened out 6× LGJ-630/45 wire program has obvious advantages, the final impact of the program from the wires project cost ratio elect 6 × LGJ-630/45 lead program in line with the actual project proposed to send Nuozhadu electric Guangdong ±800kV DC transmission line project uses 6 × LGJ-630/45 Conclusion wire program.