Hybrid power tramcar speed adjusting method based on real-time power of power system

Abstract

The invention discloses a hybrid power tramcar speed adjusting method based on real-time power of a power system. The method comprises the steps that a tramcar energy consumption model is established,and an offline planned speed-time curve of a tramcar is solved; basic resistance parameters of the tramcar are identified, self-adaptive online adjustment is carried out, and an accurate speed powermodel of a tramcar system is established; the tramcar runs according to the offline planned speed-time curve, and the real-time maximum power of the whole power system is compared with the real-time power of the power system, so that the self-adaptive adjustment of the running speed of the tramcar is realized; and the path difference caused by the speed adjustment is taken as a coefficient, and the path difference caused by the speed adjustment is eliminated through speed closed loop feedback. The hybrid power tramcar speed adjusting method automatically adjusts the running speed of the tramcar according to the real-time maximum power of the power system, and provides a speed-time curve with online tracking and self-adaptive adjustment for an automatic train driving system; and the power performance is exerted to the maximum extent, and safe, reliable, punctual running of a vehicle can be ensured.

Description

technical field [0001] The invention belongs to the technical field of hybrid electric trams, in particular to a method for adjusting the speed of hybrid electric trams based on the real-time power of a power system. Background technique [0002] Due to the high energy conversion efficiency and non-polluting characteristics, fuel cell hybrid power systems have received great attention in recent years. With the progress of fuel cell technology, fuel cell hybrid power system has been applied to the field of high-power rail transit. [0003] Traditional trams are powered by the catenary, and the catenary-powered trams obtain continuous power from the catenary through the pantograph, so the operation planning of the train does not need to consider the factors of the power system, and the fuel cell through The power source inside the car body supplies power for itself. Although it gets rid of the constraints of the traditional traction power supply system and the pantograph-cate...

AI Technical Summary

Problems solved by technology

[0003] Traditional trams are powered by the catenary, and the catenary-powered trams obtain continuous power from the catenary through the pantograph, so the operation planning of the train does not need to consider the factors of the power system, and the fuel cell through The power source inside the car body supplies power for itself. Although it gets rid of the constraints of the traditional traction power supply system and the pantograph-catenary system, the power supply mode of the whole vehicle is more flexible, but limited by the space in the car and the characteristics of the power system itself, fuel cell hybrid power has certain advantages. The electric power carried by the tram itself is limited, so the operation planning of the train needs to consider the power supply capacity of the on-board power system

However, in the existing hybrid trams, the speed of the trams is not adjusted by considering the characteristics of the power system, so that the speed adjustment effect of the fuel cell hybrid trams during operation is poor, and the maximum speed of the train cannot be guaranteed. The power performance is exerted, which greatly affects the safe, reliable and punctual operation of the vehicle

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