作为城市轨道交通的主要动力来源，直流牵引供电安全至关重要。本文围绕接触网压波动、钢轨电位和 杂散电流治理等安全供电技术开展系统综述。首先分析导致接触网压波动的主要原因，总结各类再生制动能量利 用技术的研究现状。然后讨论钢轨电位和杂散电流的产生机理，分别系统回顾钢轨电位抑制技术和杂散电流治理 技术的国内外研究进展。在此基础上，指出城市轨道交通安全供电技术亟待开展深入研究的关键问题，为安全供 电技术的研究和工程化应用提供借鉴和参考。

Safe power supply is essential to guarantee the operation of urban rail transit. In this paper, a comprehensive review is presented on safe power supply technologies including catenary voltage fluctuation, rail potential, and stray current mitigation. Considering that the source of catenary voltage fluctuation is train regenerative braking energy, this study first summarizes the research status of various regenerative braking energy utilization technologies. Then, it analyzes the generation mechanism of rail potential and stray current. Furthermore, it reviews and discusses the research status of rail potential and stray current mitigation technologies. On this basis, the key issues of safe power supply technology for urban rail transit are also pointed out, which will provide a practical basis for industry application of future safe power supply technology.

TM 922.3, U231.8

北京市自然科学基金(3222054)；国家自然科学基金重点项目(51737001)