摘要
紧凑型输电线路正在得到日益广泛的应用,但对其在复杂地形下的防雷性能研究却很少。笔者提出了一种计算分析500 kV紧凑型输电线路绕击防雷性能的方法,并将其应用于输电线路的雷击风险评估中。该方法基于经典电气几何模型,考虑三维空间内导、地线相对于地面的位置变化以及输电线路走廊地形的变化,以一个档距为研究对象来计算分析输电线路的绕击防雷性能。以某500 kV紧凑型输电线路的一段线路为例,计算其在复杂地形下的绕击防雷性能,结果表明,该方法能更好地反映线路实际运行情况,并为输电线路差异化防雷研究提供了参考。
To investigate the anti-lightning performance of compact transmission lines in complex terrain area, a method for calculating shielding failure flashover rate is presented for evaluating anti-lightning performance of 500 kV compact transmission lines in complex terrain area. Based on the electro-geometric model （EGM） ,a new model is constructed considering the micro-topography, and the relative positions of ground wire and conductor wire to the ground. Taking one spans of a 500 kV compact transmission line for example, the shielding failure flashover rate in complex terrain area is calculated. The result shows a good agreement with the actual data. The proposed method may be applied to diverse lightning protection.
出处
《高压电器》
CAS
CSCD
北大核心
2013年第11期117-122,共6页
High Voltage Apparatus
关键词
复杂地形
紧凑型输电线路
改进电气几何模型
绕击跳闸率
差异化防雷
complex terrain area
compact transmission line
improved electro-geometric model （EGM）
shieldingfailure flashover rate
diverse lightning protection
