ANALYTICAL STUDY OF THE INFLUENCE OF THE RADIATION OF HIGH-VOLTAGE POWER LINES ON THE FORMATION OF HARMONIC RADIATION IN THE IONOSPHERE

The influence of radiation from high-voltage power lines on the mechanism of harmonic radiation formation in the ionosphere is studied partially and qualitatively by analytical method on the basis of theories of the electromagnetic field, antennas, and propagation of electromagnetic waves in the atmosphere. This made it possible to interpret the frequency features of the observed spectra registered by the Earth's artificial satellites. The impact of radiation from high-voltage power lines is becoming significant due to the growing level of electricity production and use by powerful electricity consumers, which generate man-made signals at frequencies related to the frequency of the power grid and its numerous harmonics, causing changes in the parameters of the plasma and electromagnetic field in the ionosphere. High-voltage power lines are considered as an antenna system consisting of radiators equivalent to horizontal elementary electric vibrators raised by means of supports above the earth's surface. In the first approximation, the Earth and the atmosphere are described as a spherically layered medium whose electrical parameters depend only on the height to a smooth spherical surface. The components of the electric field intensity amplitude of an elementary electric vibrator in the near-field have been calculated by the analytical method, which proves a very low radiation power. In the far zone, the calculated radiation power is 150.63 kW due to the supply current of 2.93 kA, since the electrical size of such antenna is very small. The determined amplitude of the electric field strength in the ionosphere, taking into account the attenuation depending on the height of the layer, varies from 0.301 mV/m to 6.01 mV/m for altitudes from 100 km to 500 km. The obtained results do not contradict previously measured values.