An Experimental Study of Lightning Overvoltages in Wind Turbine Generation Systems
An Experimental Study of Lightning Overvoltages in Wind Turbine Generation Systems
复制标题
风力发电系统雷电过电压的实验研究
DOI：
10.1541/ieejpes.126.1230
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发表时间：
2006
影响因子：
--
通讯作者：
A. Ametani
中科院分区：
文献类型：
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作者：
Kazuo Yamamoto;T. Ohta;T. Noda;S. Yokoyama;A. Ametani
本文介绍了一项研究风力涡轮机发电系统雷电过电压的实验研究结果。本研究重点关注在雷电浪涌波前观察到的过电压。实验是在实际地面土壤上使用缩小尺寸的风力涡轮机模型及其基础进行的。假设雷击击中叶片尖端和机舱后部，将图1（a）所示的快锋电流注入这些点，并测量电流注入点的电压和表1列出的电压差V 1 – V 4 。电流注入点的测量电压波形如图1（b）所示，对于叶片冲击情况，V 1 – V 4 电压波形如图1（c）所示，对于机舱冲击情况，V 1 – V 4 电压波形如图1（d）所示。通过实验，得出以下结论： 为了获得良好的风力条件，风力涡轮机发电系统建在丘陵地区和海滨等没有高大建筑物的地方。然而，这增加了雷击的风险。为了促进风力发电，必须建立风力涡轮机发电系统的防雷方法。本文介绍了一项研究风力涡轮机发电系统雷电过电压的实验研究结果。实验是在实际地面土壤上使用缩小尺寸的风力涡轮机模型及其基础进行的。从实验中，得出以下结论： (i) 由于地基接地阻抗引起的电压上升可能会导致塔脚和输入电缆（例如电源、通信或控制线）之间出现显着的过电压。 (ii) 地基和周围地面土壤的电压升高可能会导致进线电缆最外层绝缘层出现过电压，从而导致绝缘击穿或劣化。 (iii) 获得了了解风力发电系统及其地基上的行波现象的电压和电流波形。这些数据将有助于开发用于雷电过电压研究的风力涡轮机发电系统的 EMTP 仿真模型。
This paper presents the results of an experimental study which investigates the lightning overvoltages in wind turbine generation systems. This study focuses on the overvoltages observed at the wavefronts of lightning surges. The experiments were carried out on actual ground soil using a reduced-size wind turbine model with its foundations. Assuming lightning strokes to the tip of a blade and the rear portion of a nacelle, the fast-front currents shown in Fig.1(a) were injected into these points, and the voltages at the current injection points and the voltage di ff erences V 1 – V 4 listed in Table 1 were measured. The measured waveforms of the voltages at the current injection points are shown in Fig.1(b), and those of V 1 – V 4 are shown in Fig.1(c) for the case of a stroke to a blade and in Fig.1(d) for the case of a stroke to a nacelle. From the experiments, the following conclusions have been In order to obtain good wind conditions, wind turbine generation systems are built at places like hill countries and shorefronts where few tall structures are found. However, this increases the risk of lightning strikes. To promote wind power generation, lightning-protection methodologies for such wind turbine generation systems have to be established. This paper presents the results of an experimental study which investigates the lightning overvoltages in wind turbine generation systems. The experiments were carried out on actual ground soil using a reduced-size wind turbine model with its foundations. From the experiments, the following conclusions have been deduced: (i) Voltage rise due to the grounding impedance of the foundations can cause a significant overvoltage between the tower foot and an incoming cable like a power, a communication or a control line. (ii) The voltage rise of the foundations and that of the surrounding ground soil may cause an overvoltage at the outermost insulation layer of an incoming cable, which can result in a breakdown or a deterioration of the insulation (iii) Voltage and current waveforms to understand the traveling-wave phenomenon on a wind power generation system with its foundations were obtained. The data will be useful for developing an EMTP simulation model of a wind turbine generation system for lightning overvoltage studies.