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http://dx.doi.org/10.18770/KEPCO.2019.05.04.249

Ion Effects of HVDC ±500 kV Double Bipole Overhead Transmission Line with Metallic Return Conductor Using Full-scale Test Line  

Shin, Kooyong (KEPCO Research Institute, Korea Electric Power Corporation)
Kwon, Gumin (KEPCO Research Institute, Korea Electric Power Corporation)
Ju, Munno (Korea Electrotechnology Research Institute)
Woo, Jeong Min (Korea Electrotechnology Research Institute)
Publication Information
KEPCO Journal on Electric Power and Energy / v.5, no.4, 2019 , pp. 249-256 More about this Journal
Abstract
A full-scale test line was established to verify the electrical environmental interferences caused by the HVDC ±500 kV Double Bipole overhead transmission line with metallic return conductor, which is scheduled for construction in Korea and the fullscale test was conducted for one year. And through the human perception test of the DC electric-field under the HVDC Double Bipole line, the threshold value at which the human detects DC electric field was investigated to verify the validity of the design guide for the HVDC ±500 kV Double Bipole overhead transmission line. The polarity configuration of the HVDC ±500 kV Double Bipole test line was arranged diagonally with the same polarity in terms of the electrical environment disturbance and operation. The test line utilized the 6-bundle arrangement to prevent the corona discharge taking into account the domestic social acceptability. The test results show that the HVDC ±500 kV Double Bipole transmission line generated very little corona discharge from the conductors. Therefore, both DC electric field and ion current density met the domestic design guide for DC overhead transmission lines. Also, the human perception test of DC electric fields under the test line showed that 70% of participants did not recognize the DC electric field even when exposed to 23 kV/m.
Keywords
HVDC; Double Bipole Transmission Line; DC Electric Field; Ion Current Density;
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