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Direct Lightning Strikes to Test Power Distribution Lines—Part II: Measured and Modeled Current Division Among Multiple Arresters and Grounds
| Content Provider | CiteSeerX |
|---|---|
| Author | Schoene, Jens Uman, Martin A. Rakov, Vladimir A. Mata, Angel G. Schnetzer, George H. |
| Abstract | Abstract—The division of return stroke current among the ar-resters and groundings of two unenergized test distribution lines, one horizontally configured and the other vertically configured, was studied at the International Center for Lightning Research and Testing in Florida. The division of return stroke currents for the vertically configured line was initially similar to the division on the horizontally configured line: at the time the return stroke current reached peak value (after one microsecond, or so) the two closest arresters/grounds on both lines passed about 90 % of the total cur-rent. However, the time during which the return stroke current flowed primarily through the closest arresters to the neutral con-ductor was significantly shorter on the vertically configured line. On that line, the arrester current was about equally divided among all four arresters after several tens of microseconds. The arrester current division as a function of time measured on the vertical line was successfully modeled using the published VI-character-istic, while the division on the horizontal line after some tens of microseconds was only successfully modeled if the residual voltage of the two arresters closest to the current injection point was re-duced by 20%. Based on the triggered lightning current division observed on our line, the minimum energy absorbed in each of the two arresters closest to the strike point during a typical natural first stroke is estimated to be 40 kJ. Index Terms—Arresters, grounding electrodes, lightning, mod-eling, power distribution lines, power transformers. I. |
| File Format | |
| Access Restriction | Open |
| Subject Keyword | Direct Lightning Strike Modeled Current Division Multiple Arrester Configured Line Several Ten Unenergized Test Distribution Line Current Injection Point Peak Value Minimum Energy Strike Point Lightning Current Division Index Term Arrester Power Transformer Return Stroke Current Vertical Line Arrester Current Division International Center Residual Voltage Arrester Ground Horizontal Line Lightning Research Power Distribution Line Typical Natural First Stroke Total Cur-rent Neutral Con-ductor |
| Content Type | Text |
