Experiment and Analysis of the Influence of Interferencefrom Distribution Switch Operation on Communication in Smart Grid

Intelligent devices based on Internet of Things technology has more and more applications in the power grid. However, the development of the integration of primary equipment and secondary equipment causes the secondary intelligent equipment to be vulnerable to electromagnetic interference generated by the primary equipment. In this paper, electromagnetic interference generated during the distribution switch closing the capacitive load was measured and the frequency band distribution of electric field interference and magnetic field interference was studied by wavelet analysis. By comparing the frequency bands of common communication signals used in smart grid and the interference signal, it found that the interference signal may interfere with the normal communication work in the smart grid.