OCS being positive feeders to each other in double track lines, as an assumption, was being proposed in early 70s last century, however, there was no any analysis on its characteristics reported.
复线上下行接触网互为正馈线方式作为一种设想,在上世纪70年代就曾经被提出过,但对其电气特性分析则未见有过报道。