Off-grid railway traction power supply system and regulation and control method

Abstract

The invention discloses an off-grid railway traction power supply system and a regulation and control method. The off-grid railway traction power supply system comprises a catenary, a distributed power substation, an electrical split phase and an electrical split phase switch, wherein the output end of the distributed power substation is connected to the catenary; the electrical split phase is arranged on the catenary between the adjacent distributed power substations; the electrical split phase switch is arranged on the electrical split phase in parallel; the distributed power substation comprises a primary new-energy power generation device, a secondary controllable new-energy backup power supply and single-phase boosting transformers; the primary new-energy power generation device and the secondary controllable new-energy backup power supply are independent of each other, and are connected to the catenary through the respective single-phase boosting transformers. The off-grid railway traction power supply system achieves off-grid operation of a train and improves the stability and the reliability of traction power supply of a microgrid railway; the off-grid railway traction power supply system is applicable to a grid-free area, consumes clean energy on a spot, and achieves energy conservation and emission reduction and green sustainable development of rail transit; the off-grid railway traction power supply system conforms to electric transmission locomotives widely used in China railways and has strong applicability.

Description

technical field [0001] The invention belongs to the technical field of traction power supply, in particular to an off-grid railway traction power supply system and a control method. Background technique [0002] At present, my country's railway industry is in a period of rapid development. As of the end of 2017, my country's railway operating mileage reached 127,400 kilometers, and it is expected to reach 150,000 kilometers in 2020. Behind such a rapid development, there are increasingly serious environmental pollution and resource consumption problems. The annual electricity consumption of my country's railways is more than 40 billion kWh, which is equivalent to the annual consumption of 16 billion kilograms of standard coal. With the development of clean energy in recent years, connecting renewable energy such as solar power, wind power and hydropower to the railway traction power supply system is the main way to solve the large-scale energy consumption of railways. [0...

AI Technical Summary

Problems solved by technology

Most of the existing systems need to rely on the power network combined with the distributed power supply to feed the railway traction power supply, which cannot realize the true sense of off-grid power supply, and cannot be applied to areas without grids, which has brought great obstacles to the development and popularization of railways; and now The stability and reliability of some micro-grid railway power supply systems are poor, and it is impossible for the train to smoothly take current from the catenary without breakpoints, and it is impossible to achieve safe and reliable power supply

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