Abstract
Generally, lightning damage has mainly been to home appliances and telephones, Towers and power transmission and generation equipment mal functions and damage due to strikes on power lines. With the adoption of wind power generation equipment, however, lightning damage is also increasing in this area. Through his dimensional characteristics and the wind power system is more exposed in the nature of all others. Lightning damage is the single largest cause of unplanned downtime in wind turbines and that downtime is responsible for the loss of countless megawatts of power generation. Wind turbines are high structures and, like tall towers, they not only attract downward flashes but initiate upward flashes as well. The rotation of the blades may also trigger lightning and result in considerable increase in the number of strikes to a wind turbine unit. Since wind turbines are tall structures, the lightning currents that are injected by return strokes into the turbines will be affected by reflections at the top, at the bottom and at the junction of the blades with the static base of the turbine. We present in this study our contribution to study of the impact of direct and indirect lightning strokes on wind turbines.
Highlights
Years is equal to six, whereas for the wind turbines installed in a European country like Sweden or Japan
Lightning damage is the single largest cause of unplanned downtime in wind turbines and that downtime is responsible for the loss of countless megawatts of power generation
We present in this study our contribution to study of the impact of direct and indirect lightning strokes on wind turbines
Summary
Years is equal to six, whereas for the wind turbines installed in a European country like Sweden or Japan. To lightning, which can cause important damages to According to statistics annually only 4-8% of modern wind turbine components. The majority of the faults are caused in the Europe, the average number of faults per 100 turbine control device, the generator and on the blades. Significant parts of lightning current (Baba and Rakov, 2005) passes through or near to all wind turbine components and passes electronic equipments, which contain control or measuring devices. The most vulnerable parts of the turbine for direct lightning strokes are the blades, the tower itself, the hub, the frame of the nacelle and the lightning receptors on top of the nacelle. The observed current is estimated by the sum of the design of lightning protection of modern wind turbines will be a challenging problem. It has been shown in particular that the lightning current along a tall structure exhibits multiple reflections occurring at the discontinuities and resulting in a no uniform distribution of the current (Berger, 1972)
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