Braking energy self-adaptive recovery device and recovery method for motor train unit

Abstract

The invention discloses a motor train unit braking energy self-adaptive recovery device and recovery method, and belongs to the technical field of dynamic electric energy recovery type braking. The data acquisition unit is used for acquiring current data on each power supply arm; the energy storage device is used for realizing storage or release of braking energy and enabling electric energy to be subjected to bidirectional conduction between the two sets of converter devices; the control part is used for receiving the data of the data collector, analyzing and processing the data and further controlling the converter device and the energy storage device to act; the converter device performs voltage transformation and conversion on the traction power supply to obtain a 10kV power supply used by a railway through power supply or a self-closing power supply; and the direct current buses of the two sets of converter devices are connected through the energy storage device. Braking energy is flexibly transferred between the two traction arms, the residual braking energy is temporarily stored in the energy storage device, and after braking of the electric motor train unit is finished, the energy in the energy storage device is gradually released to a railway through or self-closing load through the converter device.

Description

technical field [0001] The invention belongs to the technical field of dynamic electric energy recovery braking, and in particular relates to an adaptive recovery device and recovery method for braking energy of an EMU. Background technique [0002] During the braking process of the new AC electric multiple units and electric locomotives, energy consumption braking and regenerative braking are adopted. During the braking process, a large amount of electric energy is generated and fed back to the traction network, and then returned to the common power grid through the traction transformer. During this process, the following problems occurred: [0003] 1. The energy returned to the shared power grid is reversed without charging or reversed positive charging, causing economic losses to the railway company; [0004] 2. The current sent back is intermittent negative sequence current, which is injected into the shared grid, which is a kind of interference to the shared grid and i...

AI Technical Summary

Problems solved by technology

[0003] 1. The energy returned to the shared power grid is reversed without charging or reversed positive charging, causing economic losses to the railway company;

[0004] 2. The current sent back is intermittent negative sequence current, which is injected into the shared grid, which is a kind of interference to the shared grid and increases the risk of safe operation of the shared grid

But under normal circumstances, compared with the braking energy, the power of other electric loads is small, and the braking energy cannot be fully absorbed.

The braking energy has the characteristics of strong impact and large randomness of occurrence time, which makes it difficult to ensure the safe operation of other electric loads

Images