Aging effects of conductor surface conditions on dc corona characteristics

Journal Article · Sat Oct 01 00:00:00 EDT 1988 · IEEE Trans. Power Del.; (United States)

DOI:https://doi.org/10.1109/61.193999· OSTI ID:6568178

Suda, T; Hirayama, Y; Sunaga, Y ^[1]

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1. Central Research Institute of Electric Power Industry (CRIEPI), Komae-shi, Tokyo (JP)

In relation to the influence of the conductor surface condition on DC corona characteristics and ion flow electrification phenomena, aging effects are investigated by means of comparing a 7-yrs aged conductor of the Takeyama HVDC test line with a new one. Long-term comparative tests between the two were carried out in the monopolar and bipolar arrangements. Corona currents of the aged conductor were greater than those of the new one by 1 -- 2 times, about 2 times and 10 -- 30% in the +250 kV, -250 kV monopolar and +-250 kV bipolar arrangements, respectively, to the contrary of AC corona currents that decrease due to aging. Moreover, the artificial pollution experiments, based on the chemical analysis of adhesive substances to the aged conductor, reveals that both the corona currents and ion flow currents at ground level increase as the amount of pollution increases, especially regarding carbon, and that the differences between the monopolar and bipolar arrangements in the comparative tests as mentioned earlier can be explained by relations between the maximum conductor surface gradient and the corona onset gradient.

• OSTI ID: 6568178
• Journal Information: IEEE Trans. Power Del.; (United States), Journal Name: IEEE Trans. Power Del.; (United States) Vol. 3:4; ISSN ITPDE
• Country of Publication: United States
• Language: English

Related Subjects

20 FOSSIL-FUELED POWER PLANTS
200104* -- Fossil-Fueled Power Plants-- Components
200302 -- Power Transmission & Distribution-- DC Systems-- (1989-)
24 POWER TRANSMISSION AND DISTRIBUTION
AGING
CORONA DISCHARGES
CURRENTS
DATA
DC SYSTEMS
ELECTRIC CONDUCTORS
ELECTRIC CURRENTS
ELECTRIC DISCHARGES
ENERGY SYSTEMS
EXPERIMENTAL DATA
HVDC SYSTEMS
INFORMATION
NUMERICAL DATA
POLLUTION
POWER SYSTEMS