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DOI:
电力大数据:2019,22(8):-
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基于EMTP-ATP的风力发电机雷电电磁暂态特性分析
(1.贵州电网公司贵阳息烽供电局;2.西安交通大学电气学院)
Analysis of Lightning Electromagnetic Transient Characteristics in Wind Turbine based on EMTP-ATP
Xie Rongbin1, Xia Guangrong1, LI Jiangtao2,3,4, ZHENG Minjun2,3,4, WANG Yifeng2,3,4, fengxin2,3,4
(1.Guizhou Power Grid, Guiyang Xifeng Power Supply Bureau;2.Department of Electrical Engineering, Xi''3.''4.an Jiaotong University)
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投稿时间:2019-02-27    修订日期:2019-05-24
中文摘要: 为解决风力发电机组雷电暂态过程研究的问题,本文根据雷电流在风机系统内的流通路径,利用EMTP-ATP软件建立了单台风机系统一体化电路暂态仿真模型以及整个风电场电路暂态模型,分析了各部件模型的建立过程与模型中参数的计算方法。该模型将雷电流在风机系统内的传播路径立体地集成在一起,反映雷电流在风机系统各部件内传播时的暂态特性。基于风机系统的一体化电路暂态模型,研究了风机叶片、机舱、塔筒和变压器等部件的雷电暂态特性,并分析了电缆屏蔽层接地方式等因素对风机雷电暂态特性的影响。研究表明塔筒-线芯间的过电压在线芯的上下两端达到最大;电缆金属屏蔽层能有效降低塔筒-线芯间的感应过电压与线芯的雷电流,感应过电压的抑制比可以达到41%,线芯雷电流抑制比可达60%;此外,屏蔽层的接地方式采用两端接地时感应过电压幅值最小。
中文关键词: 风机  过电压  暂态模型  电磁暂态  屏蔽层
Abstract:In order to solve the problem of lightning transient process and protection of wind turbines, based on the circulation path of lightning current in the fan system, the transient simulation model of the integrated circuit of the single fan system and the transient model of the whole wind farm circuit are established by using EMTP-ATP software. The establishment process and model of each component model are analyzed. The calculation method of the parameter. The model can stereoscopically integrate the propagation path of lightning current in the fan system to reflect the transient characteristics of the lightning current propagating in various components of the fan system. Based on the transient circuit model of the integrated circuit of the fan system, the transient characteristics of the wind turbine blades, the nacelle, the tower and the transformer are studied. The influence of the cable shielding grounding method on the transient characteristics of the wind turbine is analyzed. The research shows that the overvoltage between the tower and the core reaches the maximum at the upper and lower ends of the wire core; the cable metal shield can effectively reduce the induced overvoltage between the tower and the core and the lightning current of the core, and the suppression ratio of the induced overvoltage It can reach 41%, the core lightning current suppression ratio can reach 60%; in addition, the grounding method of the shielding layer adopts the minimum amplitude of induced overvoltage when grounding at both ends.
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基金项目:贵州电网有限责任公司科技项目(编号:GZKJXM20170168)
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