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An experimental study of large ion density under the Shiobara HVDC test line

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2 Author(s)
Suda, T. ; Central Res. Inst., Electr. Power Ind., Tokyo, Japan ; Sunaga, Yoshitaka

The characteristics of large ions under the Shiobara HVDC (high-voltage direct current) test line found in experiments on their voltage characteristics and lateral profiles described. Applied voltage has less influence on large-ion density than on small-ion density. It is shown that large-ion density increases gradually downwind, reaches a maximum value at 67 m from the line center, and then decreases gradually; but it is 2 to 3 times larger than its BGL (background level) even at a point 200 m from the line. The empirical equations representing the characteristics of large-ion density attenuation are derived. The maximum large-ion density becomes nearly equal to 4×BGL and accounts for about 40% of the density of aerosol less than 1 μm in diameter

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Power Delivery, IEEE Transactions on  (Volume:5 ,  Issue: 3 )