Conference Paper

Wind Farm Lightning Protection System With a Kite

Authors:
  • University of Belgrade, School of Electrical Engineering
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Abstract

Height of tips of the high power wind turbine blades reaches over 200m. The objects of this height, either offshore or onshore, are often targets of direct atmospheric discharges. The existing concept of protection is not capable of providing a complete protection of all wind turbine elements against lightning currents and induced over-voltages, thus lightning strikes constitute a very frequent cause of wind turbine failures and outages. A novel concept of wind turbine protection against direct lightning strikes is presented. The idea is to place a protective system, in the form of grounded conductive wires, in close vicinity and within the area of a wind farm, the tips of the wires being kept by kites at a desired height. Height of a protective wire has to be significantly above the topmost point of any wind turbine. Stormy clouds, carried by the wind, approach first the very high tips of the protective wires, which usually results in an upward discharge, relieving charge from the clouds, thus making the probability of lightning strikes at the wind turbines considerably smaller.

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