摘要
牵引供电系统是电气化铁路的基础,牵引供电系统由于受到机车运行的工况变化的影响,以及一些不确定的因素,容易出现接地故障,又由于牵引供电系统不同于高压输电线路,所以牵引网的故障测距有着自身的特点。根据AT牵引网的实际电路在PSCAD中构造带机车负荷的仿真模型,对机车在牵引网上运行时的电压电流变化进行模拟,得出牵引网在发生短路情况下的故障数据,再利用MATLAB对仿真得到的数据进行阻抗法和行波法测距,比较两者的优缺点,最终提出将二者结合实现信息融合测距。
Electrical railway is based on the traction supply system,this system may easily be influenced by the various work condition of running locomotive and some other uncertain factors, so some faults will happen. With the difference between the traction supply system and the high voltage transmission line, the traction network owns its speciality. This paper establishes the model in PSCAD according to the actual AT net, which contains locomotives as its load. Then it simulates this model,and fault dates can be gotten when short circuit happens. This paper uses impedance method and travelling wave method to locate the fault. Comparing these two methods, each one has its advantage and disadvantage, so finally this paper combines these two methods together to locate the fault, and the accuracy is greatly improved.
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2008年第19期25-28,57,共5页
Power System Protection and Control
关键词
电气化铁道
AT牵引网
故障测距
行波法
阻抗法
electrical railway
AT net
fault location
travelling wave method
impedance method
