Energy-efficient railway traction power supply system

Abstract

The invention discloses an energy-efficient railway traction power supply system, comprising a photovoltaic power station, a three-phase photovoltaic inverter, an YNd11 wiring boosting transformer, a traction transformer and a traction power supply system. The power output terminal of the photovoltaic power station is connected to the primary side port of the YNd11 wiring boosting transformer through the three-phase photovoltaic inverter, the secondary side port of the YNd11 wiring boosting transformer is connected to the traction power supply system, and the traction power supply system is also connected to the traction transformer connected to a power grid transmission line. The YNd11 wiring boosting transformer adopts an YNd11 wiring boosting transformer. According to the invention, the generation form of self-generation for self-use and residual power for grids is adopted, the residual power is consumed by grids under the condition of guaranteeing the normal operation of the traction power supply system, the structure is simple, and the investment cost is low.

Description

technical field [0001] The invention belongs to the technical field of traction power supply, in particular to an efficient and energy-saving railway traction power supply system. Background technique [0002] Photovoltaic power generation, as a new power generation method using solar energy as an energy source, has the characteristics of cleanness, no pollution, no noise, and scalable scale. It is one of the best choices for replacing traditional fossil energy power generation in the 21st century. my country has abundant reserves of solar energy resources, and areas with annual total solar radiation greater than 1050kW·h / m2 account for more than 96% of the country's land area. Therefore, photovoltaic power generation has good development prospects in my country, and the development of photovoltaic power generation is strongly supported by national policies. [0003] The scale of railway transportation enterprises is huge, with the basic characteristics of multiple points an...

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Problems solved by technology

At present, such existing power supply schemes require a large number of inverters and transformers. At the same time, the direct connection of photovoltaic power generation to the catenary may have an adverse effect on the protection of the traction power supply system; In this type of system, batteries are often used to realize the power storage function, but the battery has the problems of limited charge and discharge power and short cycle life. Facing the characteristics of high power and intermittent load of railway locomotives, the economy is not good. high

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