Abstract
The increase in the trains weight and their operation speeds leads to considerable growth of abrupt-variable, non-linear and one-phase traction loads. This, in its own turn, leads to significant deviations, unsymmetry and voltage harmonic distortions in 110-220 kV mains adjacent to traction substations of AC railroads. Significant deterioration in power quality factors is observed in Siberian and Far East regions where 110-220 kV main power transmission lines are immediately adjacent to Transsib traction substations; in this case, in points with lower levels of short circuit power, power quality factors exceed by far the permissible levels. The articles provides the results of studies aimed at solution of power quality enhancement is-sues for mains adjacent to traction substations of Trans-Siberian Railway. To enhance power quality in mains supplying traction substations, smart grid technologies can be used together with multiagent control systems. Technical solutions, based on the results obtained, are proposed that allow to bring the power quality factors to the regulatory values. Due to a big investments amount, an implementation of tar-get program is needed to resolve the large-scale issue of enhancing power quality in mains adjacent to traction substations of AC railroads.
Highlights
Russia's railroad transport is the big energy resources consumer
Multitasking performance which is a solution of a number of additional problems, such as determining induced voltages on adjacent power supply lines (PSL) and communication lines; calculation of electromagnetic fields strengths where the fields are created by PSL and traction networks; PSL and transformers parametric identification using the measuring data received from PMU WAMS devices; accounting of smart grid active elements when modeling energy systems (EES) and railroads power supply systems (RPSS); taking into account superficial effect and the proximity effect when modeling electrical pathways with massive buses
Railroads power supply systems is a unification of complex subsystems: a part of EES adjacent to traction substations (TS); traction power supply system (TPSS) with 25 kV traction network (TN) or 2×25 kV autotransformer TPSS; power supply regions (PSR) of non-traction and non-transport consumers
Summary
Russia's railroad transport is the big energy resources consumer. The railroads account for annual consumption of 5...6% of electrical energy (EE) generated in Russia. There is an issue of electrical energy lower quality in mains supplying traction substations (TS) of mainline railroads. The results of instrumental measuring of power quality factors (PQF) indicate that on traction substations high-voltage buses of Trans-Siberian Railway there are cases of significant distortions in symmetry and voltage harmonicity [2, 3]. Multitasking performance which is a solution of a number of additional problems, such as determining induced voltages on adjacent power supply lines (PSL) and communication lines; calculation of electromagnetic fields strengths where the fields are created by PSL and traction networks; PSL and transformers parametric identification using the measuring data received from PMU WAMS devices; accounting of smart grid active elements when modeling EES and RPSS; taking into account superficial effect and the proximity effect when modeling electrical pathways with massive buses. Technical solutions, based on the results obtained, are proposed that allow to bring the power quality factors to the regulatory values
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