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Safety of wind farm grounding systems under fault and lightning currents

机译:风电场接地系统的安全性和雷电

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This article discusses the safety issues related to wind farm grounding systems. Two different cases are considered. The first case treats a wind turbine subjected to a single phase to ground fault while the second case treats a wind turbine hit by lightning. In the first case, a detailed analysis of the fault current distribution for various scenarios, is presented. A comparative study of the touch and step voltages has demonstrated that the fault conditions on HV side leads to dangerous touch and step voltages. A focus is made on the human safety regarding lightning surges. In this regard, the transient currents flowing through the legs and body are computed for two different lightning waveforms. A comparative study of these currents for the cases of a single and two turbines reveals the non-validity of one of the design criterion established in international standards.
机译:本文讨论了与风电场接地系统相关的安全问题。考虑了两种不同的病例。第一种情况将风力涡轮机处理到接地故障的单个阶段,而第二种情况会通过闪电处理风力涡轮机。在第一种情况下,介绍了对各种场景的故障电流分布的详细分析。触摸和阶跃电压的比较研究表明,HV侧的故障条件导致危险的触摸和阶跃电压。对雷电潮的人类安全进行了重点。在这方面,针对两个不同的闪电波形计算流过腿部和主体的瞬态电流。对单一和两个涡轮机的情况的这些电流的比较研究揭示了在国际标准中建立的一个设计标准之一的无效性。

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