特高压输电线路防雷杆塔模型研究  

Study on Lightning Prevention of UHV Transmission Line Tower

作　　者：徐迎[1] 安韵竹[1] 

机构地区：[1]武汉大学电气工程学院,湖北武汉430072

出　　处：《陕西电力》2011年第3期37-40,共4页Shanxi Electric Power

摘　　要：特高压电网的发展使电能的远距离传输成为可能,输电线路不断扩展的同时也带来了杆塔高度的增加。早期的集中电感杆塔模型和单波阻抗模型无法准确模拟雷电侵入变电站的波过程,计算得到的过电压过于保守,对绝缘的要求过高。文中以ATPDraw计算程序为平台,以某特高压变电所为实例,将传统杆塔模型和改进后的多波阻抗模型进行对比,正确测量和计算杆塔波阻抗,仿真测量杆塔的雷电特性,并分析各自的可行性。研究计算表明,由多波阻抗杆塔模型得到的过电压低于传统杆塔模型,更符合特高压工程实际。在特高压输电线路防雷计算中,建议采用多波阻抗杆塔模型。The development of UHV power grid make the long-distance transmission of electrical energy into possible,the expansion of the transmission lines have brought the increasement in tower height at the same time.The traditional lumped inductance tower model and single wave impedance model can not accurately simulate the process of lightning invasion wave substation,and the calculated-voltage is too conservative,thus asking for high requirement of insulation.In this paper,ATPDraw is taken as a platform, and the high voltage substation as an example,traditional model and improved model are contrasted for multi-wave impedance.The impedance of the tower is correctly measured and calculated,the lightning characteristics are simulated and the feasibility is analyzed. Calculations show that the result of the over-voltage from the multi-wave impedance is lower and more consistent with the UHV engineering.It is suggested to use the multi-wave impedance in the calculation of lightning in UHV transmission line.

关 键 词：特高压输电线路 杆塔模型 波阻抗 过电压 雷电特性 

分 类 号：TM863[电气工程—高电压与绝缘技术]