325 / 2022-03-15 14:45:01

Analysis of chaotic characteristics of partial discharge in insulating materials

partial discharge,,insulating materials,chaotic,air gap

Existing studies show that the internal partial discharge of insulating materials is not a simple random process, but a chaotic process. The chaotic characteristics can provide judgment basis in the development degree of partial discharge and the early warning of insulation breakdown. Therefore, it is necessary to further study the chaotic characteristics of partial discharge. Based on the general generalized partial discharge model and theoretical formula, this paper uses MATLAB to calculate the discharge amount and discharge time interval in the process of air gap partial discharge in insulating materials under different voltage levels and temperatures, and constructs its time series. Then, the chaotic characteristics of partial discharge are characterized by chaotic characteristic parameters such as Lyapunov index and correlation dimension, The results show that the Lyapunov exponent and correlation dimension of partial discharge time series will be different under different conditions. In a certain range, the applied voltage and temperature indirectly affect the chaotic characteristics of partial discharge by affecting the feedback mechanism of partial discharge and the randomness of initial electrons. This conclusion lays a foundation for the further study of the chaotic mechanism of partial discharge.