Electromagnetic Field Analysis and Shielding Method of Underground Variable Frequency Power Cable

The transmission and radiation of underground variable frequency electromagnetic waves will seriously interfere with the operation power cable its surrounding environment. At present, test methods for cables basically require impedance system to match characteristic cable. defect is that process designing making matching network relatively complex requires high manufacturing accuracy. In order solve these problems, this paper puts forward field fast detection formula shielding method research principle materials suppression layer coupling. function two principles study reflection, absorption, multiple reflection cut-off nonmagnetic layer. These guide experiment. paper, measurement performance mismatched derived through experiments. results show error no more than 8 dB. Then, experiment restraining interference magnetic on field, it concluded can reach 20 materials, efficiency metal fiber antiradiation largest, average reaches 76.4