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首页> 外文会议>電気学会研究会資料 放電 開閉保護 高電圧合同研究会 ED-08-108~114·116~118·120~129 SP-08-23~29·31~33·35~44 HV-08-37~43·45~47·49~58 >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 distribution within the grounding system of a wind-turbine-generator (WTG) tower struck by lightning and transient electric field inside the tower have been calculated using the finite-difference time-domain (FDTD) method. The grounding terminal for the WTG tower struck by lightning is connected to that of a neighboring WTG tower through an insulated wire. About 40% of the lightning current flows in the grounding grid of the neighboring tower at 30 μs. Inside the towers, the radial component of electric field is most significant. Its peak value is about 1kV/m near the base of each tower when alightning current having a magnitude of 30 kA and a10-to-90% risetime of 2.5 fis is injected. The electric field decreases with increasing the height of the observation point in the tower When the grounding terminals are buned 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）方法计算了风力发电机（WTG）塔的接地系统中被闪电击中的瞬态电流分布以及塔内部的瞬态电场。被雷击的WTG塔的接地端子通过绝缘线连接到相邻WTG塔的接地端子。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。当注入大小为30 kA的雷电流和2.5fis的10％至90％的上升时间时，其峰值在每个塔架底部附近约为1kV / m。电场随着塔中观察点高度的增加而减小。当接地端子在子结构下方成束（接地栅格通过地下绝缘线连接）时，塔内的电场会大大降低。

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