基于变电站避雷器事故接地研究
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摘要
针对某变电站雷击导致避雷器烧毁事故,通过现场调研测量接地电阻值及软件仿真分析,得出该变电站事故的主要原因是雷电反击。同时提出线路避雷器并接防雷电容器及对避雷针、进线终端杆塔及出线首端杆塔进行局部接地冲击优化,并采用电磁暂态仿真软件ATP进行仿真验证。仿真结果表明:该两项措施能有效降低雷电过电压陡度及幅值,能起到较好的防雷效果。该研究不仅能够提高变电站的供电可靠性,同时能够为同类型变电站改造及建设提供相应的工程实例,具有一定的借鉴意义。
Aiming at the burning accident of lightning arrester in a substation due to the lightning strike,through ground investigation and measurement of grounding resistance value and software simulation analysis,it is concluded that the main cause of the substation accident is lightning counterattack. At the same time,it is proposed that the line arrester is connected in parallel with the lightning protection capacitor,the local grounding impact is optimized for the lightning rod,the incoming terminal tower and the outlet end tower,and the electromagnetic transient simulation software ATP is used for simulation verification.The simulation results show that the two measures can effectively reduce the steepness and amplitude of lightning overvoltage,and can play a better lightning protection effect. The study can not only improve the power supply reliability of the substation,but also provide the corresponding engineering examples for the transformation and construction of the same type of substation,which has certain reference significance.
Aiming at the burning accident of lightning arrester in a substation due to the lightning strike,through ground investigation and measurement of grounding resistance value and software simulation analysis,it is concluded that the main cause of the substation accident is lightning counterattack. At the same time,it is proposed that the line arrester is connected in parallel with the lightning protection capacitor,the local grounding impact is optimized for the lightning rod,the incoming terminal tower and the outlet end tower,and the electromagnetic transient simulation software ATP is used for simulation verification.The simulation results show that the two measures can effectively reduce the steepness and amplitude of lightning overvoltage,and can play a better lightning protection effect. The study can not only improve the power supply reliability of the substation,but also provide the corresponding engineering examples for the transformation and construction of the same type of substation,which has certain reference significance.
引文
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[15]刘溟,曹斌,郑俊杰,等.输电线路杆塔地网冲击接地电阻现场测量方法[J].电瓷避雷器,2014(4):37-42.LIU Ming,CAO Bin,ZHENGJunjie,et al. The impact network transmission line Tower grounding resistance measuring method[J]. Insulators and Surge Arresters,2014(4):37-42.
[2]刘雨晴.雷电在输电线路及变电站传播过程中的响应特性及识别研究[D].成都:西华大学,2016.
[3]张睆曦.变电站雷电过电压计算建模与绝缘配合研究[D].长沙:长沙理工大学,2015.
[4]张丹. 110 k V电力系统雷电过电压仿真研究及绝缘配合分析[D].呼和浩特:内蒙古工业大学,2015.
[5]扈海泽,敬亮兵,袁雪琼,等.杆塔接地改造新方法[J].电瓷避雷器,2016(4):148-151.HUHaize,JING Liangbing, YUAN Xueqiong, et al.Tower Tower grounding transformation of new methods[J]. Insulators and Surge Arresters,2016(4):148-151.
[6]吴静文.输电走廊雷电过电压特性及其影响规律研究[D].成都:西南交通大学,2014.
[7]陈丛丛.输电线路雷电过电压模拟研究[D].北京:北京交通大学,2014.
[8]扈海泽,刘小丽,毛弋,等.特殊防雷接地系统技术研究[J].电瓷避雷器,2016(2):68-73.HUHaize,LIU Xiaoli,MAO Yi,et al. Special lightning protection grounding system technology research[J]. Insulators and Surge Arresters,2016(2):68-73.
[9]董新伟,张晓文,刘丽丽. 110 k V架空线路避雷器安装方式仿真研究[J].电瓷避雷器,2017(1):47-50.DONGXinwei,ZHANG Xiaowen,LIU Lili. Simulation of installation of 110 k V overhead line arrester[J]. Insulators and Surge Arresters,2017(1):47-50.
[10]陈焕.架空输电线路雷电过电压的瞬态特性研究[D].保定:华北电力大学,2014.
[11]隋东硼.计及冲击电晕的500 k V变电站雷电过电压计算及防雷措施研究[D].沈阳:沈阳工业大学,2013.
[12]文丽. 500 k V输电线路雷电过电压研究[D].成都:西华大学,2013.
[13]刘柏良.东莞地区10 k V配网用避雷器故障分析及对策[D].广州:华南理工大学,2013.
[14]扈海泽,卫亚洲,王林,等.基于避雷器在煤矿变压器中性点事故运用分析[J].电瓷避雷器,2016(1):78-83.HUHaize,WEI Yazhou,WANG Lin,et al. Based on the arrester in the coal mine transformer neutral point accident analysis[J]. Insulators and Surge Arresters,2016(1):78-83.
[15]刘溟,曹斌,郑俊杰,等.输电线路杆塔地网冲击接地电阻现场测量方法[J].电瓷避雷器,2014(4):37-42.LIU Ming,CAO Bin,ZHENGJunjie,et al. The impact network transmission line Tower grounding resistance measuring method[J]. Insulators and Surge Arresters,2014(4):37-42.