List of Articles earth system

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  1 - The effect of comprehensive modeling of the earth system by the fitting method on lightning overvoltages in isolated wind turbines in the direction of smart arresters
  Mehrdad Mahmoudian Sajad Sadi
  The construction of wind farms in areas with high isochronic number, high tower height, intensification of the electric field due to the sharp tips of the blades and the possible contact of the blades with the nearby clouds, the importance of checking the overvoltage ap More

  The construction of wind farms in areas with high isochronic number, high tower height, intensification of the electric field due to the sharp tips of the blades and the possible contact of the blades with the nearby clouds, the importance of checking the overvoltage applied to the network The power by the high frequency wave makes the lightning brighter. Also, the wind turbine grounding system should be designed in such a way that, in addition to achieving impedance specifications with standard steady state values, it can effectively drain the lightning current into the ground. In this article, in the simulation of the earth system, the soil ionization phenomenon and the high frequency behavior of its electrodes have been considered so that it can be used as a reference potential to measure the voltage of all points. Then, the vector fitting method has been used to model the earth system. Of course, the input of the vector fitting method can be considered the frequency response of each element which is calculated numerically using common methods such as the FDTD method. Since the use of a more accurate calculation method provides more reliable results to the users, therefore, in this article, the overvoltage to a 2 megawatt wind turbine has been investigated using EMTP specialized software. Manuscript profile