Regenerated braking energy recovery optimizing method and system for hybrid power tramcar

Abstract

The invention discloses a regenerated braking energy recovery optimization method and system for a hybrid power tramcar. According to an operation characteristic curve of the fuel cell hybrid power tramcar and a mechanical characteristic curve of a traction motor, braking operation control optimization of a driving mode is set, electric braking force is fully utilized, and braking energy feedbackis maximized; and then, by optimizing energy management strategies, output distribution of all power supplies is controlled, and braking energy recovery is maximized. According to the regenerated braking energy recovery optimization method and system for the hybrid power tramcar, stable braking and braking energy recovery are achieved while it is ensured that a fuel cell hybrid power system supplies electricity to the load of the tramcar reliably; under the premise of ensuring the braking property of the system, braking optimization of combination of feedback braking, energy consumption braking and mechanical braking is achieved, braking energy recovery is maximized as much as possible, the fuel utilization rate is increased, and the purpose of fuel economy is achieved; and braking noise is reduced, emission is reduced, the service life of an energy storage device is prolonged, the operating cost is reduced, and the braking safety of the tramcar is improved.

Description

technical field [0001] The invention belongs to the technical field of fuel cell hybrid power, and in particular relates to a method and system for optimizing regenerative braking energy recovery of a hybrid electric tram. Background technique [0002] With the rapid development of social economy, urban population density and floating population are increasing day by day, the existing urban traffic has been overwhelmed, traffic inconvenience has become a major factor restricting social and economic development, and at the same time, it has made it difficult for residents in large and medium cities to drive and ride. The phenomenon. The growth of private vehicles makes the traffic more congested, and at the same time causes air pollution and noise pollution. In the field of transportation, urban rail transit vehicles have the advantages of large passenger capacity, fast speed, high efficiency, comfort, and low direct pollution emissions. In addition, hybrid electric trams ar...

AI Technical Summary

Problems solved by technology

[0004] For the trams currently powered by the traction network, only a small part has the braking energy recovery capability, and the braking energy recovery can only be performed when there are other trams in the same line that need to absorb energy from the line. The recovery method is single, and it is easy to cause the bus voltage to rise, resulting in the instability of the bus voltage

For the braking of trams using clean energy (such as hydrogen energy), due to the high braking power, the large braking current will cause damage to the energy storage device

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