ELECTROMAGNETIC SAFETY IN PERSPECTIVE SYSTEMS OF ELECTRIC POWER SUPPLY OF TRUNK RAILROADS
The electromagnetic fields (EMF) framed by high-voltage power lines represent a dangerous form of environmental pollution which level increases. EMF with high intensity levels can break functioning of electric and electron devices, cause ignition of flammable substances and lead to fatal accidents. Influence of the electromagnetic field causes inhibition of the central nervous system, a headache, slackness, fatigability. Changes of blood structure and pressure, an acceleration of pulse etc. are observed. One of EMF serious sources is electromagnetically unbalanced railroad traction network of alternating current which electromagnetic influence can cause emergence of appreciable voltage on interfacing devices, lead to damages of the equipment and severe electric traumas. In the conditions of the electrified railroad it is difficult to obtain the experimental data answering to the maximum levels of EMF intensity, therefore electromagnetic situation analysis in traction power supply systems is recommended to be made on mathematical modeling basis. Especially it concerns the perspective systems of traction power supply developed now differing in the increased voltage level. At such systems practical realization special relevance is acquired by questions of electromagnetic safety which is defined by electromagnetic processes set in space area. The main characteristics of these processes are intensities of electric and magnetic fields. The methods developed at Irkutsk state transport university for sinusoidal regimes in phase coordinates allow carrying out simultaneous calculations of EMF intensities of multi wire power lines when determining a regime of traction power supply system. At the same time the analyzed line is considered in indissoluble communication with electrical power system. Simultaneous calculation of system regime and EMF allows to realize systemic approach to electromagnetic situation analysis which distinctive feature is the possibility of EMF modeling taking into account all properties and characteristics of TPS and the feeding EPS.