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雷直击接触网导致线路跳闸或设备损坏是影响中国高速铁路安全运行的重要因素,必须针对高直击雷害风险区段采取相应措施,提高整体防雷运行水平。基于高速铁路结构特征,建立了牵引网三维雷击电气几何模型,推导了馈线及承力索三维直击雷暴露弧面的垂直投影面积,结合沿线雷电活动参数,得到了高速铁路牵引网直击雷跳闸率的算法,并通过沪宁城际高铁实际运行雷击故障数据验证了该模型及算法的准确性,并分析了沪宁城际高铁牵引网直击雷害的特点。结果表明:随着雷电流的增大,承力索及馈线三维暴露弧面垂直投影面积均增大,增大速率均递减,承力索与馈线三维暴露弧面垂直投影面积之比先增大后减小。
Ray strike catenary network lead to line trip or equipment damage is an important factor affecting the safe operation of China’s high-speed railway, and must take appropriate measures for the risk of direct strike at the mine risk zone to improve the overall level of mine operations. Based on the structural characteristics of high-speed railway, the three-dimensional lightning electrical geometry model of traction network was established and the vertical projection area of exposed arc surface of three-dimensional direct lightning exposure of the feeder and load cable was deduced. Combined with the lightning activity parameters along the line, Algorithm of Shanghai-Nanjing Intercity High Speed Rail, and verify the accuracy of the model and algorithm through the actual operation of Shanghai-Nanjing inter-city high-speed rail and analyze the characteristics of straight-line lightning strike of Shanghai-Nanjing inter-city high-speed rail traction network. The results show that with the increase of lightning current, the vertical projected area of three-dimensional exposed arc of bearing cable and feeder increases and the increasing rate decreases, and the ratio of vertical projected area of three-dimensional exposed arc of bearing cable and feeder first increases After the decrease.