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首页> 外文期刊>電気学会論文誌 B:電力·エネルギー部門誌 >FDTD Electromagnetic Analysis of a Wind Turbine Generator Tower Struck by Lightning
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FDTD Electromagnetic Analysis of a Wind Turbine Generator Tower Struck by Lightning

机译：风力发电机塔被雷击的FDTD电磁分析

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摘要

Transient current distributions within the grounding systems of a wind-turbine-generator (WTG) tower struck by lightning and its neighboring WTG tower, and transient electric field inside these towers have been calculated using the finite-difference time-domain (FDTD) method. The grounding terminal for the generator inside the lightning-struck WTG tower is connected to that inside the neighboring WTG tower through a long insulated wire. About 40% of the lightning current flows in the grounding grid of the neighboring tower at 30μs. Inside the towers, the radial component of electric field is most significant. Its peak value is about 1 kV/m near the base of each tower when a lightning current having a magnitude of 30 kA and a 10-to-90% risetime of 2.5 μs is injected. The electric field decreases with increasing the height of the observation point in the towers. When the grounding terminals are buried below the substructure (the grounding grids are connected via an underground insulated wire), the electric field inside the tower is significantly reduced.
机译：已经使用有限差分时域（FDTD）方法计算了被雷击的风力发电机塔（WTG）塔及其相邻的WTG塔的接地系统内的瞬态电流分布，以及这些塔内的瞬态电场。遭受雷击的WTG塔内发电机的接地端子通过一根长绝缘线连接到相邻WTG塔内的发电机的接地端子。大约40％的雷电流在30μs时流入相邻塔架的接地网。在塔内，电场的径向分量最为重要。当注入雷电流为30 kA且上升时间为2.5μs的10％至90％时，其峰值在每个塔架底部附近约为1 kV / m。电场随着塔中观察点高度的增加而减小。当接地端子埋在子结构下方时（接地栅格通过地下绝缘线连接），塔内的电场将大大降低。

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