Modeling of Partial Discharge Waveforms in the Generalized Model of Power Transformer Insulation

Abstract

The paper discusses the forms and characteristics of partial discharges (PD) obtained as a result of modeling in the Multisim environment. An attempt is made to establish the relationship between the electrical parameters of the source, in particular, the inductance of the isolation between the source and the location of the PD and the form of the electrical signal of the partial discharge in the generalized model of the power transformer. An attempt is also made to create a generalized model of a power transformer with an electric defect inside the insulation of its windings. The method of monitoring the technical condition of high-voltage electrical equipment by fixing the characteristics of partial discharges is one of the methods that allows you to obtain information about possible defects in the insulation of electrical equipment. The electrical contact method of controlling the characteristics PD is one of the most sensitive methods for obtaining such information. The construction of most of the characteristics PD according to GOST and IEC gives comprehensive information on the processes of electrical equipment occurring inside the insulation. Unfortunately, the huge flow of information, as well as its excessive volume, makes it difficult to interpret the results of control and testing. There is also a huge amount of data that will project to each other. In particular, PD waveforms can have a completely different appearance, and it is necessary to take into account both the object of the test and its operating conditions.