Improving the reliability of wind turbine generation and its impact on overall distribution network reliability

An increasing number of wind turbines are being incorporated into electrical networks. In some countries they are becoming a key part of the distribution network & as such affect the overall system performance & reliability [1]. The configuration, technology & size of wind turbines have been changing rapidly over the last few years & larger turbines, >=3D2MW, incorporating this new technology are being installed onshore throughout Europe. The potential for more wind turbines to be erected in remote locations & offshore, to achieve a greater wind energy harvest, is heightening the need for accurate reliability prediction so that network reliability calculations can be done & wind turbine life predicted. This paper concerns a reliability modelling problem that has arisen when analysing the Failure Rates of wind turbines in Denmark & Germany, using data collected from Windstats [2] over the past 7 years. One of the authors has also shown [3] that such data can be used to predict the reliability of future equipment.