| 刊名 | Meteorological and Environmental Research |
| 作者 | Yinghui HUANG1, Xiaoqing PAN1, Renhong GUO2, Zengru YANG2, Jianbo LUO3, Zhongqiu SHI2* |
| 作者单位 | 1. Guangdong Yuedian Zhuhai Offshore Wind Power Co., Ltd., Zhuhai 519040, China; 2. Guangdong Yuedian Yangjiang Offshore Wind Power Co., Ltd., Yangjiang 529500, China; 3. Guangdong Foshan Shunde Lunjiao Jindun Lightning Protection Technology Development Co., Ltd., Foshan 528308, China |
| DOI | 10.19547/j.issn2152-3940.2025.06.014 |
| 年份 | 2025 |
| 刊期 | 6 |
| 页码 | 59~64 |
| 关键词 | Wind farm; Box-type transformer; Lightning current invading N line; Conduction and coupling test |
| 摘要 | In theory, due to the fact that the grounding wire PE of wind turbine and the N-line (directly grounded) of the Y-shaped wiring on the low-voltage side of the box-type transformer share the grounding body, when the wind turbine is struck by lightning, the lightning current is directly conducted to the N-line on the low-voltage side of the box-type transformer (invasion mode of transformer synonym end). At the same time, conducted overvoltage pulse is generated in the three-phase winding on the low-voltage side, and coupled to the high-voltage side of the box-type transformer (Δ connection) to generate coupling overvoltage pulse. After investigation, the existing regulations on the tripping rate of power lines have not taken into account the impact of wind turbines being struck by lightning on line tripping, and the mechanism is still unclear. In order to further analyze the causes of lightning tripping of collection line circuit breakers in wind farms, it is necessary to study the physical process of how lightning current is conducted (coupled) to the collection line through the box-type transformer after lightning strikes on the wind turbines. In this paper, the test method of "conduction and coupling test of lightning current invading transformer N-line", and the waveform parameters (polarity, phase, amplitude, and transformation ratio) of the primary and secondary windings of the box-type transformer when lightning current invades the transformer N-line are introduced. It can provide assistance for operation and maintenance personnel to analyze the reasons for lightning tripping of 35 kV line circuit breakers in wind farms. |
