Karpaliuk I. Methods and tools for assessing the impact of corona discharge on the quality of power supply

The work contains a solution to the urgent scientific and technical problem of creating and improving methods and means for monitoring the quality parameters of power supply systems, which will increase the reliability of monitoring and diagnostics of the state of power supply systems with restrictions on the amount of measurement information. This problem consists in taking into account the influence of such a deteriorating factor as corona discharge on the quality indicators of the power supply system. Until that time, corona discharge was considered as a parasitic power consumer. In this work, attention is paid to the relationship of corona discharge and deterioration of quality indicators of power supply: corona discharge can interfere with the operation of relay protection; corona discharge can become a source of conditions for arcing on insulators; corona discharge is an indicator of a problem in the insulating parts of an electrical power system. The paper proposes to determine the presence of a corona discharge and its coordinates for the possibility of taking measures to eliminate it. It is proposed to determine the presence of a corona discharge and its coordinates by acoustic radiation. The proposed method has been tested in laboratory conditions. Based on the results of laboratory studies, the acoustic spectra inherent in the corona discharge have been clarified. A mathematical model was developed to determine the presence of the corona acoustic spectrum in the noise of electrical equipment. The proposed method for determining the presence of a corona discharge by the acoustic spectrum and a method for determining the coordinates of a corona discharge by acoustic radiation make it possible to create diagnostic devices. The proposed method of acoustic diagnostics makes it possible to use the developed acoustic diagnostic system, which allows express diagnostics when installed even on platforms that move and have a significant movement speed. The results of experimental studies of the developed system showed its compliance with the technical requirements and the possibility of obtaining diagnostic information with galvanically independent diagnostics.