为全面研究海上风电场设备互连时雷电击中海上升压站的综合暂态效应,首先将升压站平台等效为离散化网络π型电路,基于散射参数和传输线理论搭建升压站变压器和海底电缆模型,然后搭建海上风力机与陆地输电杆塔（二者通过海底电缆与海上升压站互连）的一体化波阻抗模型,探讨雷电击中海上风电场各部分引起的过电压分布规律。实验结果表明,雷电击中海上升压站时,产生MV级的响应电压,引起变压器处的峰值电压为雷击点电压的1/10,且其内部峰值电压略高于外壳;当雷电击中海上风力机或陆地输电杆塔,升压站变压器内部均产生kV级的响应电压。
Abstract
In order to comprehensively study the integrated transient effects of lightning striking the offshore booster station when the offshore wind farm equipment is interconnected, the booster station platform is firstly equated to a discrete network π-type circuit, and the booster station transformer and submarine cable models are constructed based on the scattering parameter and transmission line theories, and then an integrated wave impedance model is constructed between the offshore wind turbine and the onshore transmission tower （which are interconnected with the booster station through the submarine cables）, and then the distribution law of overvoltage caused by lightning striking each part of offshore wind farm is explored. The experimental results show that when lightning strikes the offshore booster station, it generates MV-level response voltage, causing the peak voltage at the transformer to be 1/10 of the voltage at the lightning strike point, and its internal peak voltage is slightly higher than that of the enclosure; when lightning strikes the offshore wind turbine or the onshore transmission tower, the internal transformer of the booster station generates kV-level response voltage.
关键词
海上风力机 /
雷电 /
海底电缆 /
海上升压站 /
暂态效应
Key words
offshore wind turbines /
lightning /
submarine cables /
offshore booster station /
transient effect
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基金
河北省省级科技计划（21567605H）; 基于无线网络全覆盖的海上风电安全生产管理平台建设研究与应用（XT-KJ-2021012）
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