Laboratory Stray Current Analog Device Power Compensation

This article is mainly about a new method that can compensate the metros stray current along with the rail of subway. Using the means of this method, we can mitigate the erode degree of the nearby buildings by the metros stray current.We add a compensation electrical source that is the amount is equal to the current in appointed area, but the direction is opposite. In the appointed area, the metros stray current will be disappear or mitigate.This article discusses the entire design, the simulation set of lab metros stray current and the measure set of metros stray current, the choice of the compensation electrical source, the sampling circuit design of the compensation electrical source, the test result and analysis, and some advise when using this method in real environment. The keystone of this article is the compensation electrical source, the test result and analysis.We choose DH1719 electrical source as the compensation electrical source. We design the sampling circuit according to the source and the simulation set of lab metros stray current.We test three instances according to the metros stray current and the train in real environment. From the result of the test, we can conclude that this method is well working and it can mitigate the metros stray current produced by the lab simulation set.