Electric Field Linesdc Transmission
Purpose of research. The purpose of the study: the Study is devoted to the study and definition of the electromagnetic field (EMF) of power lines of direct current to various circuits and voltages at certain points of the environment and comparison with EMFs of power lines of the alternating current. The study is devoted to the study of determining the Purpose of the work and it is to determine the electromagnetic field (EMF) of direct current power lines of different circuits and different voltages at certain points in the environment and compare it with the EMF of alternating current. Methods. the Main advantage of direct current power lines is the ability to transmit large amounts of electricity than common alternating current power lines (transmission lines). It allows the transmission of electricity between non-synchronized alternating current systems, and is also effective in the transmission of energy through underwater cables because of its large capacity. The most common types of schemes are monopolar and biopolar. The HVDC supports are designed to carry two conductors, even if the second conductor is not used or is used in parallel with the other. Currently, direct current power lines are distributed worldwide. HVDC is being built in China at a high rate, power lines create an electromagnetic field in the surrounding space, the range of propagation and its value depends on the voltage and is a very strong factor in the influence on the state of all biological objects falling into its zone of influence. The paper calculates the electric field strength on the earth's surface and at the level of human growth, in the monopolar and biopolar HVDC at different voltages by the method of mirror images. Results. Comparing the electric field strength in the area of alternating current and direct current power lines, we see that at the same voltage, the electric field in the HVDC is lower and at a distance from the wires decreases faster. Conclusion. At present, there is no data on the calculation of the electric field HVDC And comparative analysis with the field of alternating current power lines in the literature. The proposed method of calculation of EMF allowed by comparative analysis for a specific situation to assess the benefits of using alternating current or direct current power lines. Taking into account the development of Converter technology and taking into account the advantages of HVDC, it can be concluded that there are great prospects for the development of direct current transmission lines. HVDC must be placed taking into account the area of action and the magnitude of their electromagnetic field, so as not to harm the environment and human life.