文档介绍：应用ATP-draw计算500kV变电站的绕击耐雷水平
应用ATP-draw计算500kV变电站的绕击耐雷水平
Application of ATP-draw around the calculation of 500kV substation level LIGHTNING
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摘要
由于输电线路所经地区的地形、地貌、雷电活动情况以及线路自身的防雷设计和绝缘水平不同,雷击引起的故障原因各不相同。如果没有针对特殊地段采取特殊的防雷措施,难以收到较好的防雷效果。国内外运行经验表明,500kV及以上电压等级输电线路,尤其在山区丘陵地带,绕击是造成雷击的主要原因。因此要重视雷击跳闸原因的分析,根据具体情况及运行经验采取有效和针对性的防范措施,降低输电线路的雷击跳闸率。
本课题中应用ATP-draw计算程序计算500kV变电站的绕击耐雷水平。通过仿真软件建立变电站按一线一变方式运行的情况下的变电站模型和进线端线路模型。并计算当雷击于500kV变电站近区输电线路导线上时,变电站内高压电器设备上的过电压水平。计算研究中,先假定一个变电站内电气设备的绝缘配置水平,与计算得到的耐雷水平进行比较,来判断此次绕击是否会发生线路跳闸事故。对仿真结果进行分析,通过对比数据得出变电站的绕击耐雷水平,并进一步思考如何改进变电站的防雷能力。
关键词:输电线路绕击电气几何模型绕击跳闸率耐雷水平
Abstract
By transmission lines because of the topography of the area, landscape, lightning activities, and line their own different levels of lightning protection design and insulation, lightning caused by faults for different reasons. If there is no special section for the lightning to take special measures, the mine is difficult to receive good results. Domestic and international operating experience shows that, 500kV and above voltage transmission lines, especially in the mountainous hills, around the lightning strike is the main cause. Therefore, attention should be paid analysis of the causes lightning trip, according to the specific circumstances and operating experience to take effective and targeted preventive measures to reduce the rate of transmission line lightning trip.
Application of this project calculation program to calculate ATP-draw around 500kV substation LIGHTNING level. The simulation software to establish a change substation line run by the circumstances of the substation model and into the line-side line model. And calculate when lightning strikes near the 500kV transmission line substation wire, the substation high voltage equipment on the over-voltage level. Calculation of the first electrical device assuming a substation insulation staffing levels, and calculated pare the level of resistance to mine, to determine whether the