摘要
The grounding grid buried in the earth will become a hidden danger to the safety of substations due to some faults of breaks or thinner conductors in corrosion.A novel method to get accurate status of grounding grid was proposed based on measuring magnetic induction intensity.The basic structure of grounding grid without working drawing was concluded,and the positions and the status of faults were diagnosed by this method.The completed detecting system,including hardware device of data measurement,diagnosis,and analysis software,was introduced concisely.The results of simulations and applications show that this method is simple and effective in the practical engineering.
基金
This work was supported in part by the Scientific Research Foundation of Doctor Degree in North China Electric Power University(200912008).
