KEPCO 765 kV transmission system development corona and electric field effects studies

Conference · Sun Dec 31 04:00:00 EST 1995

OSTI ID:433830

Kim, J B; Lee, D I; Shin, K Y ^[1]; Yang, K H; Ahan, H S ^[2]; Koo, J Y ^[3]

---

1. Korea Electric Power Research Inst., Daejeon (Korea, Republic of)
2. Korea Electrotechnology Research Inst., Kyungnam (Korea, Republic of)
3. Han Yang Univ., Kyunggi (Korea, Republic of)

This paper describes corona and electric field effects studies of a 765 kV double circuit test line. In Korea there are many mountains and it is very difficult to get the right of way because the population density is very high and the territory is small. So Korea Electric Power Corporation (KEPCO) decided to build one double-circuit 765 kV line of vertical arrangement configuration instead of two single-circuit 765 kV lines of horizontal configuration. Corona performance on several candidate conductor bundles has been investigated with a corona cage since 1984 by KEPRI. A bundle of 6-Rail(29.61 mm) conductors per phase is the optimum and its AN level L{sub 60} in the corona cage was measured as 45.0 dB(A) in GE method. To investigate electrical environmental impact of the future commercial line with this conductor bundle, KEPRI built a full scale 765 kV test line in 1993 as the second step study. Long-term measurements have been made in this double-circuit test line. The authors have found that the Audible Noise (AN) data were very close to the predicted by BPA Corona and Field Effects computer program, however, the RI data in fair weather was higher than the predicted by the BPA program by 2.4 dB({mu}V/m). Audible Noise Level L{sub 50} in foul weather is below 50 dB(A). The authors think the 6-Rail conductors bundle is the optimum size in 765kV double-circuit transmission line from the environmental view-point.

• OSTI ID: 433830
• Report Number(s): CONF-951136--; ISBN 0-7803-2981-3
• Country of Publication: United States
• Language: English

Related Subjects

24 POWER TRANSMISSION AND DISTRIBUTION
CORONA DISCHARGES
EHV AC SYSTEMS
ELECTRIC FIELDS
INTERFERENCE
POWER TRANSMISSION
POWER TRANSMISSION LINES
RADIO NOISE
REPUBLIC OF KOREA