通过同步监测(有轨)电车的轨地电位和管道通/断电电位,研究了超级电容储能供电型有轨电车对埋地钢质管道的杂散电流干扰。结果表明:电车在车站充电时,铁轨轨地电位有明显的正负向偏移,杂散电流通过铁轨吸收和排放。管道受电车杂散电流干扰影响时,通电电位为-7.060～3.023 V (相对铜/硫酸铜参比电极,CSE),断电电位为-1.219～-0.143 V_CSE,沿线多处管道断电电位正于-0.85 V,不满足阴保准则,干扰影响范围远大于97 km。管道靠近与远离电车的管段互为杂散电流流入和流出的区域,且靠近电车管段的干扰程度更大。电车在牵引变电站供电范围内的车站充电时,铁轨轨地电位上升,铁轨流出的杂散电流就近流入电车附近的管段,杂散电流顺着管道往远离电车的方向流动,在远离电车的管段流出。

By synchronously monitoring the rail ground potential of the tram and the on/off potential of the pipeline, the stray current interference of super capacitor energy storage power supply tram on the buried steel pipeline was studied. The results showed that when the tram was charged at the station, the rail ground potential had obvious positive and negative deviation, and stray current was absorbed and discharged through the rail. When the pipeline was affected by the stray current of the tram, the power on potential of the pipeline was -7.060 -3.023 V_CSE, and the power off potential was -1.219 --0.143 V_CSE. The power off potential at many places along the pipeline was higher than -0.85 V, which did not meet the cathodic protection criteria, and the interference influence range was far greater than 97 km. The pipe section close to the tram and the pipe section far away from the tram were areas where stray current flowed in and out of each other, and the interference effect of the pipe section close to the tram was revelatively far. When the tram was charged at the station within the power supply range of the traction substation, the ground potential of the rail rised, and the stray current from the rail flowed into the pipe section near the tram. The stray current flowed along the pipeline to the direction far from the tram, and flowed out in the pipe section far from the tram.