A locomotive adaptive hybrid braking control method

Abstract

The invention discloses a self-adaptive hybrid braking control method of a locomotive. The method comprises steps as follows: 1) the voltage of a grid assessed by a target locomotive is monitored in real time, and when the monitored voltage of the grid is within a preset voltage range, step 2) is executed; 2) real-time braking feedback energy of the target locomotive is detected, hybrid braking control is executed if the detected real-time braking feedback energy is larger than preset allowed feedback energy, part of the real-time braking feedback energy is fed back to the grid and the rest is consumed by a braking resistor until the braking feedback energy is smaller than the preset allowed feedback energy according to the voltage of the current grid and the preset allowed feedback energy; 3) the real-time braking feedback energy is all fed back to the grid and step 1) is executed. The hybrid braking control manner and control and regulation of feedback grid energy can be realized self-adaptively on the basis of grid voltage change, and the method has the advantages that the implementation method is simple, the required cost is low and the braking control efficiency and the timeliness are high.

Description

technical field [0001] The invention relates to the technical field of locomotive braking control, in particular to a locomotive adaptive hybrid braking control method. Background technique [0002] In practical engineering applications, different models are often used at the same time in the same locomotive depot. Due to the different technologies used by different models, their operating voltage fluctuation ranges may be different. For example, the old models are usually 17KV ~ 30KV, and the new models are . 17KV~31KV. When the locomotive is in the braking condition, the formation of vehicles in the same power supply section is usually not considered at present, and the braking feedback energy is directly fed back to the grid by the locomotive to realize energy recovery. [0003] Considering that the capacity of the substation is limited, the feedback energy will cause the network voltage of the line to be raised, and when multiple locomotives in the same power supply sec...

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Problems solved by technology

[0003] Considering that the capacity of the substation is limited, the feedback energy will cause the network voltage of the line to be raised, and when multiple locomotives in the same power supply section are under braking conditions at the same time, due to the different operating voltage fluctuation ranges of different models, the above brake control The method may cause the line network voltage to exceed the allowable working range of the locomotive, interfere with the normal operation of the working voltage with a small fluctuation range (such as the old model), and cause damage to the locomotive system

That is to say, the above braking control method, grid energy flow and grid voltage changes are uncontrollable, and flexible adjustment of grid energy cannot be realized. When different models are mixed, there is a risk that the braking feedback energy will make the grid voltage rise beyond the allowable range. It is suitable for mixed use of different models Sex is not strong

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