Structure and properties of the diagnostic model of electrical equipment insulation defects. N.V. KINSHT, N.N. PETRUNKO

Abstract

Structure and properties of the diagnostic model of electrical equipment insulation defects. N.V. KINSHT, N.N. PETRUNKO (Institute of Automation and Control Processes, FEB RAS, Vladivostok).

Methodological issues of constructing a diagnostic model of the insulation defect of a high-voltage equipment element as a source of partial discharges (PD) are considered. A classification of the primary electrophysical parameters that determine the PD process is given. The concept of secondary process parameters is introduced. The relationship between the parameters of the defect model and the measured parameters is formalized. It is postulated that it is necessary to use a pair of special algorithms (called direct and inverse PD transformations) that solve mutually inverse problems – the analysis of the PD process and the diagnosis of the parameters of the defect model. As an example, it is presented a quasi-deterministic defect model that allows identifying special properties of the PD series that are useful in analyzing the PD against the background of noise, as well as in the differential diagnosis of defects.