高速铁路是现代化的铁路,它用高速的列车行驶来达到多、快、好、省的运输目的。目前正在进行方案研究的株洲电力机车试车线中的主环形线铁路,就是其中一例。但要如何修建这样一条试车最高速度为160km/h 的铁路,而且是在电流负荷阻力及速度不变情况下做恒速试车试验的高强度铁路线,并不是一件很容易的事情。世界上一些工业比较发达的国家, High-speed railway is a modern railway, which uses high-speed train driving to achieve more, faster, better, provincial transport purposes. The main ring line railway in the Zhuzhou electric locomotive trial line currently undergoing program study is one example. However, it is not an easy task to construct such a high-strength railway line with a test speed of 160km / h and a constant speed test run at current load resistance and speed. Some of the world’s more developed industrial countries,