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| Content Provider | IET Digital Library |
|---|---|
| Author | Laudani, Antonio Andrea Maria Carloni, Lisa Thomsen, Ole Thybo Lewin, Paul Golosnoy, Igor O. |
| Abstract | Rotor blades of large, modern wind turbines are susceptible to lightning strikes. In order to produce a design that resists lightning strikes, it is crucial to simulate lightning current propagation in the blade components. Since the current in the blade is generated by the superposition of potential and induced electric fields, a coupling exists between electric and magnetic fields which need to be calculated by an imposed integral constraint at each time step. Commercial software packages can deal with such constraints, but it results in time-consuming computations. Therefore, this work aims to develop a numerical methodology able to compute the voltage which drives the lightning current through the structure. In this way, the problem is reformulated as a voltage-driven one which in turn allows a simple subsequent coupling of electrical and magnetic problems. The computation of the voltage waveform was accomplished using the fast Fourier transform and the finite element method (FEM) to compute the structure impedance in the frequency domain. The developed procedure showed high efficiency for a blade subjected to different lightning impulses. It allows a description of the time-dependent lightning current to be given, as well as the distribution of current within the blade conductors. |
| Starting Page | 786 |
| Ending Page | 799 |
| Page Count | 14 |
| ISSN | 17518822 |
| Volume Number | 14 |
| e-ISSN | 17518830 |
| Issue Number | Issue 7, Sep (2020) |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/iet-smt/14/7 |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/10.1049/iet-smt.2019.0343 |
| Journal | IET Science, Measurement & Technology |
| Publisher Date | 2020-04-22 |
| Access Restriction | Open |
| Rights Holder | © The Institution of Engineering and Technology |
| Subject Keyword | Blade Component Blade Conductors Blades Commercial Software Packages Current Distribution Different Lightning Impulses Electrical Problem Fast Fourier Transform Finite Element Analysis Finite Element Method Imposed Integral Constraint Induced Electric Field Lightning Lightning Current Distribution Lightning Current Propagation Lightning Protection Magnetic Field Magnetic Problem Mechanical Component Modern Wind Turbines Numerical Analysis Numerical Approximation And Analysis Numerical Methodology Potential Field Power System Protection Resists Lightning Strikes Rotor Blades Rotors Simple Subsequent Coupling Time-consuming Computations Time-dependent Lightning Voltage Waveform Voltage-driven Wind Power Plant Wind Turbine Wind Turbine Blades |
| Content Type | Text |
| Resource Type | Article |
| Subject | Atomic and Molecular Physics, and Optics Electrical and Electronic Engineering |
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