基于一体波阻抗模型的风电机组雷电过电压分析  

Lightning-induced Overvoltage Analysis of Wind Turbines Based on Integrated Wave Impedance Model

作　　者：陶家元 曹强 郑雪娜 顾小慧 吴胜磊 何慧君 吕鹤飞 TAO Jiayuan;CAO Qiang;ZHENG Xuena;GU Xiaohui;WU Shenglei;HE Huijun;LV Hefei(Chongqing Electronic Engineering Vocational College,Chongqing 401331,China;Nanjing Nanrui Jibao Electric Co.,Ltd.,Nanjing 211102,China)

机构地区：[1]重庆电子工程职业学院,重庆401331 [2]南京南瑞继保电气有限公司,江苏南京211102

出　　处：《电工技术》2024年第3期162-164,167,共4页Electric Engineering

基　　金：重庆电子工程职业学院2022年校级科研项目“基于一体波阻抗模型的风电机组雷电过电压分析及抑制措施研究”(编号22XJZXYB13);重庆市教育委员会科技项目(编号KJQN201802405,编号KJQN202303129)。

摘　　要：雷电暂态过电压是影响风电机组安全稳定运行的重要因素之一。基于风电机组雷击下的一体波阻抗模型,探讨了信号电缆屏蔽层、土壤电阻率和雷电流波形对过电压水平的影响,并开展了过电压抑制措施的研究。结果表明:信号电缆采用双屏蔽层及风电机组接地系统良好的接地能更好地降低过电压;信号电缆两端更容易发生击穿;雷电流幅值和波前时间对信号电缆的过电压影响较大;信号电缆顶端安装SPD(浪涌保护器)可有效抑制其过电压。Lightning-induced transient overvoltage is an important factor affecting safe and stable operation of wind turbines.This paper analyzes dependences of overvoltage level on signal cable shielding layer,soil resistivity,and lightning current waveform based on integrated wave impedance model of wind turbines encountering lightning strikes,and reports a study on overvoltage suppression measures.It can be concluded that that the application of double shielding layers for signal cables and a good grounding system for wind turbines can better reduce overvoltage.The two ends of signal cables are more prone to breakdown.Amplitude and crest time of lightning current curve impact largely on overvoltage of signal cables.Moreover,installation of SPD(surge protective device)on top of the signal cable can effectively suppress its overvoltage.

关 键 词：风电机组 雷电暂态模型 信号电缆 雷电防护 

分 类 号：TM86[电气工程—高电压与绝缘技术]