High speed railway tractive power supply system for distributed photovoltaic power supply and control method

Abstract

The invention discloses a high speed railway tractive power supply system for a distributed photovoltaic power supply and a control method. A photovoltaic array implements maximum power tracing, boost and inversion through a photovoltaic inverter, alternating electric energy with a low voltage grade output by the single phase photovoltaic inverter is boosted through a photovoltaic boosting transformer and then is led into the tractive power supply system; and the high-voltage side of the photovoltaic boosting transformer is connected with a contact net output port of an autotransformer an a midpoint. Due to adoption of a single phase grid connection technology, electric energy quality of the high speed railway tractive power supply system can be improved; electric energy sent by the distributed photovoltaic power supply first meets traction load requirements; when there is redundant electric energy, the redundant electric energy is sent back to a power system, and grid connection of the photovoltaic electric energy is implemented; in addition, a high speed railway is large in rate of traffic flow, an operation time interval of the high speed railway and a power generation peak time interval of the distributed photovoltaic power supply are high in goodness of fit, and a photovoltaic electric energy absorptive problem is solved.

Description

technical field [0001] The invention relates to the technical field of traction power supply, in particular to a high-speed railway traction power supply system and a control method of a distributed photovoltaic power supply. Background technique [0002] Railway and photovoltaic power generation are two major fields that our country is currently vigorously developing. By the end of 2015, my country's railway operating mileage had reached 121,000 kilometers, of which 19,000 kilometers were high-speed railways. According to the "Medium and Long-Term Railway Network Planning" issued by the National Development and Reform Commission, my country's railway network will reach 150,000 kilometers in 2020, covering more than 80% of large cities, including 30,000 kilometers of high-speed railways; the scale of the railway network will reach 175,000 kilometers in 2025 , including 38,000 kilometers of high-speed railways. According to the "Medium and Long-term Development Plan for Rene...

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Problems solved by technology

[0005] In my country's existing high-speed railway traction power supply system, the traction transformer often adopts V / x connection form; but the existing system that introduces photovoltaic power generation into high-speed railway traction power supply system, due to the introduction of photovoltaic power The impact is relatively large, making the original system unable to work normally; in addition, the high-speed railway traffic density is high, and the existing system cannot solve the problem of photovoltaic power consumption

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