376results about How to "EMI suppression" patented technology

The invention relates to a method for detecting the position of an underground conductor and the grid structure of a transformer station grounding network under the normal running condition of a transformer station. The method comprises the following steps of: 1, connecting a sine wave current source between two lower guide bodies at appropriate positions by using existing lower guide body wires on the ground surface; 2, constructing a right-angle coordinate system in a horizontal direction by taking a current injection point as an original point; 3, measuring ground surface magnetic induction strengths along an x direction and a y direction respectively, and recording position coordinates where peak values appear simultaneously; and 4, reversely calculating a grounding network structure according to a measured result and the peak value coordinate, and drawing a structure diagram of the grounding network to judge the positioned of a buried conductor and the grid structure of the grounding network. The detection system consists of a detection signal generating part and a signal detection part. According to the method, the underground conductor, position and structure of the transformer station grounding network can be detected rapidly and accurately under the normal running condition of a transformer station, and the problems of loss and defect of a drawing of the transformer station grounding network are solved.