Abstract
The paper presents results of analysis of disadvantages of contactless automatic voltage regulation (CAVR) system with a reactor switching device (RSD) that is used on direct current electrified railways. It also shows direction of its improvement. The authors have considered a functional scheme of the closed CAVR system of a converter unit with a thyristor-reactor switching device (TRSD) and a TRSNP-12500/10 converter transformer. They have also carried out an engineering and economical comparison of two modes of traction power supply system (TPSS) operation: without application of voltage regulation devices on traction substations with no-load voltage of 3500 V and with application of voltage regulation devices by the CAVR system at stabilization of voltage on levels of 3500, 3600 and 3700 V with various variants of switching devices. As a result, the authors have determined that the use of the CAVR system with the TRSD is economically efficient.
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