广州地铁18号线和22号线AC 25 kV同相牵引供电方案研究

Research on AC 25 kV Co⁃phase Traction Power Supply Scheme for Guangzhou Metro Lines 18 and 22

广州地铁18和22号线属于市域铁路,速度高、运量大,牵引供电系统采用AC 25 kV供电制式。针对AC 25 kV牵引供电系统存在的电分相问题,在牵引变电所采用单相组合式同相供电方案,取消牵引变电所出口电分相;牵引变电所供电臂间采用电子开关过分相,消除所间无电区。该供电系统解决了电能质量问题,实现全线不断电同相供电,列车无感知断电运行,安全高效地实现了运量提升、再生制动能量利用提高等目标,是AC 25 kV智能同相牵引供电技术在城市轨道交通中的成功应用。

Guangzhou Metro Lines 18 and 22 are suburban railway with high speed and large capacity.The traction power supply system adopts the AC 25 kV power supply system.To address the phase division issue of the AC 25 kV traction power supply system,a single⁃phase composite co⁃phase power supply scheme is implemented at the traction substation,the phase break at the output of the traction substation is eliminated.Electronic switches are used for phase break between the feeding section of the traction substation which eliminates the power⁃free zone between the feeding sectiones.This power supply system solves the problem of power quality,achieves continuous power supply in the co⁃phase throughout the entire line,and enables trains to operate without sensing power outages,safely and effi⁃ciently achieves goals such as increasing transportation capacity and improving the utilization of regenerative braking energy,and is a successful application of the AC 25 kV intelligent co⁃phase traction power supply technology in urban rail transit.