风电机组雷电过电压的仿真分析

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Abstract As one of the important factors affecting the secure operation of wind farm, lightning strikes can cause serious damage to wind turbines. In the process of lightning, when the lightning current flows through the wind tower, overvoltage may appear on the three-phase cable and transformer by the coupling effect of electromagnetic field. As a result, the normal operation of wind turbines will be affected. The study built a comprehensive wind turbine model and calculated the level of transient overvoltage in PSCAD. Various ground resistances and two earthing modes were simulated, to observe transient phenomena in wind tower and cable. The calculating results show that the lower ground resistance helps to reduce the overvoltage on the cable but fails to reduce the maximum of the overvoltage on the wind tower. Moreover, earthing mode has great influence on wind turbine system, and each has advantages and disadvantages. At last the case verifies the effectiveness of the lightning protection design when the arrestors were installed. Consequently, a reasonable lightning protection design is applicable according to the calculating results.

Key words： Lightning stroke wind turbine model overvoltage earthing mode arrestor protection

Received: 28 October 2014 Published: 30 December 2015

PACS:	TM863
	TM743

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	Articles by authors
	Xiao Xiang
	Zhang Xiaoqing
	Li Cong

Cite this article:

Xiao Xiang,Zhang Xiaoqing,Li Cong. Simulation Analysis on Overvoltage in Wind Turbines by Lightning Stroke[J]. Transactions of China Electrotechnical Society, 2015, 30(24): 237-244.

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https://dgjsxb.ces-transaction.com/EN/ OR https://dgjsxb.ces-transaction.com/EN/Y2015/V30/I24/237

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