On the issue of environmental safety at electrical substations with a voltage of 110 kV and above

Abstract

Purpose. Analysis of information indicating the need to develop a program aimed at improving the system of industrial environmental control and the application of preventive measures to reduce the negative impact of electromagnetic field intensity levels near high-voltage equipment on the territory of electrical substations with a voltage of 110 kV and higher.

Methods. Experimental investigation of the spatial distribution of the electromagnetic field with the formation of intensity maps for industrial frequency (50 Hz) and high-frequency fields.

Findings. It is shown that the electromagnetic environment at such facilities is characterized by high values of electric and magnetic field strengths in a wide frequency range. Information is provided on the sources of electromagnetic fields at electrical substations, as well as maps of the distribution of field levels both at low frequency and in the high frequency range. Information on the spectral composition of the electromagnetic radiation emitted by 500 kV power autotransformers is presented. It is noted that the most powerful radiation is observed in the range from 1 to 150 MHz. The distribution maps of increased field strength levels at substations for various frequencies are given as examples. The most dangerous areas for maintenance personnel and the factors influencing the increase in field intensity have been identified. The results of experimental studies are presented, showing that for equipment with a service life exceeding the standard, there is an increase in the levels of electromagnetic fields. It is concluded that in order to protect personnel at electric power facilities, it is necessary to develop measures to protect against electromagnetic interference, depending on the location of high-voltage equipment at the power facility.

Application field of research. These studies are focused at researching the problem of improving environmental control to prevent excessive exposure to the human body. The obtained results can be used to develop and improve the methods of environmental control at high-voltage substations of 110 kV and higher.