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- W3146073253 abstract "Abstract- Analysis of lightning current in communication and power cables is essential for lightning protection in radio base stations. In this paper an equivalent circuit method is developed to evaluate lightning current distribution among the cables mounted on a cable ladder. Both skin and proximity effects in the cables are taken into account and an efficient modelling procedure is presented. The proposed method is validated experimentally, and is applied to evaluate the lightning current in a practical cable installation. A significant error is observed if the traditional model is used. Keywords-skin effect, proximity effect, lightning current, cable, PEEC I. INTRODUCTION Radio base stations are tall structures, and are nonnally placed in remote areas. They are frequently exposed to lightning discharges. As both radio- and power-frequency cables are routed from outdoor antennas to indoor equipment, they are the primary carrier of lightning current in equipment rooms. This certainly increases the risk of lightning-generated damage in the equipment rooms. To provide effective protection for electronic equipment in the radio base stations, analysis of lightning current in these cables is essential. Numerical methods have been developed to analyze lightning current among conductors, such as finite-differencetime-domain method (FDTD) [1], partial element equivalent circuit method (PEEC) [2] and others. In [3] an extensive review of skin-effect loss modeling for PEEC was presented. These skin-effect models are incorporated into traditional PEEC solvers to find out transient voltages and currents in the conductors. These methods, however, are limited to the cases in which the proximity effect among cables is not significant. In reality the proximity effect can have a great impact on the lightning current distribution, especially among closely spaced conductors. Ignoring the proximity effect could lead to a significant error of the lightning current in the cables. This paper presents an analysis of lightning current among closely-spaced finite-length cables. In order to consider both skin and proximity effects among the conductors, a special meshing scheme is proposed. This scheme is incorporated into the PEEC modeling procedure for analysis of transients among closely-spaced conductors. This proposed method has been validated experimentally. With the proposed method lightning current in practical cable installations is evaluated. Comparison with the thin-wire models without considering the proximity" @default.
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- W3146073253 date "2015-01-01" @default.
- W3146073253 modified "2023-09-23" @default.
- W3146073253 title "Lightning current among closely-spaced cables" @default.
- W3146073253 hasPublicationYear "2015" @default.
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