Examination of the reliability of laboratory tests for modelling lightning strikes to wind turbines

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Supervisor:
Dr. Kiss István
Department of Electric Power Engineering

Effective energy supply in the modern world is of utmost importance. In order to be realized, we need all the economically available energy production methods to be utilized. Therefore the renewable energy sources became more important, including the most dynamically developing one, the wind energy.

In the case of wind turbines due to the structure of, the lightning protection system has a great relevance. The system is highly important to ensure the safe operation. In our measurements we will use a method invented by Dr. Tibor Horváth, the Probability Modulated Attraction Space (PMAS) method.

First in my dissertation, I give a short overview about the lightning protection systems, the used receptor quantity, and disposition of the recently used wind turbines. With the use of AutoCAD we designed a scaled model of the most common blade positions, and receptor disposition, then we calculate their attraction space with a software which uses a technology based on the PMAS theory. We create the real scaled models for the measurements, we form the receptors on them. Then we examine the shape of the formed attraction space, and the ratio of the space sections belonging to separate receptors, to each other. After our measurements, we calculate the expected strike volume of each individual receptor, then we compare it with the volume in the standard. Furthermore, we examine that which receptor have the highest probability to suffer a lightning strike. We want to find out that, it’s possible to create a discharge, which runs along on the blade surface, before connects on the receptor. We want to do our measurement, with different receptor number and disposition.

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