Identification of chaotic characteristics in partial discharge

The chaotic characteristics of partial discharge (PD), which may seem to be stochastic and merely random, were investigated using methods to discern between chaos and random signals, e.g. correlation integral, Lyapunov characteristic exponents. For the purpose of obtaining experimental data, a partial discharge detecting system using a computer aided acoustic sensor to detect PD signals from a liquid type insulating system, was used. While this method is very different from typical statistical analysis from the point of view of nonlinear analysis, it can provide better interpretation criteria according to the time evolution of a degradation process in the same type of insulation system.