动力照明从接触网取电方案探讨

摘要

非洲城市基础设施落后，电网不发达，轨道交通高压或低压贯通线难度大、投资高；轨道交通地面车站、高架车站用电负荷小，等级高，选择经济、可靠的供电方式，给沿线的动力照明负荷提供电源十分重要；列车牵引接触网全线贯通，接触网电压为直流，波动范围大，探讨从接触网取电，通过逆变、稳压给车站动力照明负荷供电方案及其可行性。%　　In Africa, in view of the out-of-date urban infrastructure, underdeveloped power grid and difficult construction and large investment in HV/LV lines for rail transit, it is recommended that an economical and reliable power supply mode should be selected for ground station and elevated station of rail transit requiring low electrical load but high grade, so as to provide power supply for power & lighting load along the line. The overhead contact line system in train traction is available along the entire line, featuring a DC voltage and a large fluctuation range. And the scheme of power supply by overhead contact line system for power & lighting load of the station through contravariant and voltage stabilization as well as its feasibility is discussed.