IMPROVING THE QUALITY OF ELECTRICITY IN THE NETWORKS OF NON-TRACTION CONSUMERS OF RAILWAYS BY CONNECTING TO THEM RENEWABLE SOURCES
Keywords:
renewable energy sources, distributed generation, non-traction consumers of railways, wind power plant, photovoltaic plant.Abstract
The paper considers expedient schemes of connection of renewable energy sources (RES) to railway power grids. Today, the implementation of distributed generation (DG) based on RES in the railway grid is an urgent issue. Despite the fact that scientific and practical aspects of the development and implementation of DG systems are studied by many domestic and foreign scientists, there is still no reasonable opinion on the most appropriate use of a particular direction of RES in railway power supply systems. There are only recommendations for connecting RES to the tires of traction substations. Now it is profitable to create their own power plants with RES, connecting them to external networks, from which only then the railway receives power. The purpose of the work is to improve the quality of electricity in the supply networks of non-traction consumers of railways by connecting to them renewable energy sources. Research methods are based on modern methods of computational mathematics, statistics and information analysis using modern computer technology. Research results. The paper develops supply system for traction and non-traction consumers by electric mains to which wind power plants (WPPs) are connected, and a model of railway mains where RES is connected to transformer substation (TS) wiring of non-traction consumers. The introduction of wind turbines in the railway power supply system according to the above scheme can really significantly improve the quality of electricity in the power supply network of their non-traction consumers. But the approximation of this quality to the allowable values occurs only when the power of the additional source is not less than 35% of the nominal value of the total load of all connected to the winding 6.6 kV consumers. An example of connecting a photomultiplier tube to the railway network, which is carried out without the use of any storage of energy generated by them, is considered. The introduction of possible directions for the use of RES in railway power supply systems is chaotic and unsystematic, and so far there is no reasonable vision for the most appropriate option. The originality is the introduction of renewable energy sources in the power supply system of non-traction consumers of railway transport. Practical implications. The use of additional renewable energy sources to supply non-traction consumers minimizes electricity consumption.
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