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Publications (3)0 Total impact

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    ABSTRACT: The grounding system plays an important role in the quality of power produced by windfarms, since overvoltages caused by a fault situation, have to be successfully dispersed into the ground. In this paper the effect of grounding system design in transient overvoltages appearing in windfarm electrical installations is studied. In particular, the effect of interconnecting individual wind turbine grounding systems via horizontal strips on transferred overvoltages is examined
    Harmonics and Quality of Power Proceedings, 1998. Proceedings. 8th International Conference On; 11/1998
  • I. Cotton, N. Jenkins
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    ABSTRACT: The high levels of energy, current, charge and rate of current rise associated with a lightning strike can result in a structure being severely damaged if struck. A key stage in determining the type of lightning protection system (LPS) required by a structure is the estimation of the lightning strike frequency. For each strike, the probability of the energy/current/charge/rate of current rise exceeding a specific value can also be found mathematically. The IEC standard detailing lightning protection of structures, IEC 1024-1: 1990, provides a method of calculating the lightning strike frequency to an object of no more than 60 m height. Considering modern wind turbines may have a hub height greater than 60 m, this standard is inapplicable to such machines. Of particular importance in tall structures is the possibility of upward propagating lightning strikes. The assessment of the total lightning strike frequency, both upward and downward propagating, can be assessed using two independent models
    Lightning Protection of Wind Turbines (Digest No: 1997/303), IEE Half-Day Colloquium on; 12/1997
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    ABSTRACT: Lightning damage to wind turbines has been one of the main causes of wind power outages. Wind turbines are steadily growing in both height and numbers explaining why an increased frequency of lightning damage is observed. This coupled with the costs of repairing such large wind turbines increased the need for a form of lightning protection system standardisation within the wind power industry. This paper presents an overview of selected parts of the latest IEC 61400 standard dealing with lightning protection of wind turbines. Particular emphasis is given to wind farm grounding systems.