Method for optimizing electric energy mass and energy utilization efficiency of overhead lines

Abstract

The invention discloses a method for optimizing the electric energy mass and energy utilization efficiency of overhead lines. The method is characterized in that an AC-DC-AC device (RPC) with a back-to-back structure is adopted in the overhead lines and is used for connecting different power supply arms, and the RPC supplies electric energy or recovers braking energy when a vehicle is pulled or braked. According to the method, the power needed to be supplied or absorbed by the RPC at each phase change node is calculated through a cooperative optimization algorithm by collecting the traction orbraking power in each phase change arm in the same overhead line, the three-phase imbalance of the overhead lines is inhibited, and the energy utilization rate is improved.

Description

Technical field [0001] The invention relates to the field of high-speed railway catenary, in particular to a method for utilizing electric power quality and efficiency of the catenary. Background technique [0002] With the vigorous development of the railway industry, electric traction power supply has become the most important power supply method for railways. Electric traction adopts single-phase AC power frequency power supply system, and the local power supply network reduces the voltage to supply power to the vehicles. However, because the vehicle contact network adopts one-way Power supply, therefore, causes the three-phase imbalance of the power grid, which poses certain safety risks to the safe operation of the power grid. Moreover, a large amount of braking energy will be generated when the vehicle is braking. If the braking energy is directly fed back to the power grid, it may increase the three-phase imbalance of the power grid, and a large number of harmonics will af...

AI Technical Summary

Problems solved by technology

[0002] With the vigorous development of the railway industry, electric traction power supply has nearly become the most important power supply method for railways. Electric traction adopts a single-phase AC power frequency power supply system, and the local power supply network is stepped down to supply power to vehicles. Therefore, the three-phase unbalance of the power grid will be caused, which will cause certain safety hazards to the safe operation of the power grid.

Moreover, a large amount of braking energy will be generated when the vehicle brakes. If the braking energy is directly fed back to the grid, it may increase the three-phase unbalance of the grid

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