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地铁系统在道床内铺设排流网来收集杂散电流以减少其腐蚀危害。当杂散电流数量较大时需要对排流网排流将杂散电流引回变电所负极。为了防止杂散电流沿着埋地金属物向远离变电所的方向流出腐蚀埋地金属物,有的地铁公司采取对地网排流的方法。用仿真的方法讨论了分别与同时给排流网和地排流对杂散电流分布的影响,同时讨论了对排流网和地网排流的可行性。
The subway system places a drainage net in the track bed to collect stray currents to reduce its corrosion damage. When the stray current is larger, the drain current needs to drain the stray current back to the negative pole of the substation. In order to prevent the stray current flowing out of the buried metal objects along the direction of the substation away from the buried metal objects, some subway companies adopt a method of draining the earth net. The influence of simultaneous and separate discharge and net discharge on the stray current distribution is discussed with the simulation method, and the feasibility of drainage of discharge and ground network is also discussed.