复杂线路复线直供牵引供电系统测距优化研究

针对上下行电流比故障测距方法在复杂线路的复线直供牵引供电系统中应用测距精度不高的问题,提出了一种分段上下行电流比优化算法,将抗雷线圈、供电线、电缆、站场等效为供电臂的长度,进行故障距离计算,通过某复线直供线路的跳闸数据验证了该方法的可行性和有效性。同时为了方便故障测距装置的分段整定及计算,参考分段电抗法形式,引入分段点的实际线路长度、等效长度及电流比,简化上下行电流比测距整定及计算。

In order to solve the problem that the fault location accuracy of the up and down current ratio fault location method is not high when it is applied to the traction power supply system of the double track of direct power supply,a segmented up and down current ratio optimized algorithm is proposed.The lightning resistant coils,power supply feeders,cables,stations and yards are equivalent to the length of the power supply section for fault distance calculation.The feasibility and effectiveness of the method are verified through data of tripping of a double track line of direct supply.At the same time,in order to facilitate segmented setting and calculation of fault location device,with reference of forms of segmented impedance method,the actual length of the line,equivalent length and current ratio at the segmented point are introduced to simplify the setting and calculation of the up and down current ratio fault location.