Влияние геоиндуцированных токов на дроссель-трансформаторы рельсовых цепей железнодорожной автоматики

Abstract

Objective: To consider the possibility of DC magnetization of the core of the impedance bond with secondary winding when using AC electric traction. To determine the possible influence of solar activity, and in particular the geoinduced currents, on the signaling arrangements (SAs). Methods: Analysis of the conditions and causes of magnetization of the core of the impedance bond with a secondary winding, which is the reason for a decrease in its inductance and a change in the track circuit coefficient of transmission. Description of the influence of geoinduced currents on the operation of traction substation power transformers and the using this scenario for modeling the operation of impedance bonds with secondary windings. Results: The conditions and reasons for the incorrect operation of the impedance bonds with secondary windings associated with the magnetization of the core by direct current, when using electric traction with alternating currents, have been stated; the possibility of saturation of the magnetic system of the impedance bond with geoinduced current has been analyzed; the possible consequences of the transition of the impedance bond to the saturation mode have been determined. Practical importance: The study findings broaden the knowledge about the possible influence of solar activity on the railway infrastructure facilities, which in its turn is necessary for the development of methods and means aimed at ensuring the uninterrupted operation of railway transport.