A charging method of hybrid electric tram and its simulation calculation method

Abstract

The invention discloses a charging method of a hybrid power tramcar and a simulation calculation method of the hybrid power tramcar. The method includes the steps that when a vehicle stops at a station to be charged, the real-time voltage value and the critical voltage value of a super capacitor are calculated and compared, if the real-time voltage value of the super capacitor is smaller than or equal to the critical voltage value, the maximum current provided by the ground charging station is connected to charge the super capacitor, and a corresponding simulation calculation result is calculated; and if the real-time voltage value of the super capacitor is larger than the critical voltage value, and a battery capacitor is in a fully-charged state, the super capacitor is charged accordingto the maximum current provided by the ground charging station, and a corresponding simulation calculation result is calculated. Due to the adoption of the above technical scheme, charging strategiesare flexibly selected according to specific line conditions, compared with an existing simulation calculation method, the simulation calculation method is higher in energy use rate and more in charging quantity, the problem that the vehicle cannot run to the next station due to the long station distance and a large ramp is solved, arranged charging piles can be reduced, and therefore investment maintenance cost is reduced.

Description

technical field [0001] The invention relates to the field of trams, in particular to a charging method for a hybrid tram and a simulation calculation method thereof. Background technique [0002] 100% low-floor tram power supply is divided into catenary power supply and non-grid power supply. The catenary power supply is gradually eliminated by the market due to its unsightly appearance and affecting the city appearance. Therefore, energy storage trams without grid power supply appear. Although the trams powered by supercapacitors have a large discharge rate, they have the problems of less stored energy, large station spacing, and large ramps, which prevent them from running to the next station. Although the trams powered by batteries have high energy density, they have low power density, long charging and discharging time, and the lifespan is lower than that of supercapacitors, so they cannot be used as the main power supply of vehicles. [0003] The existing single super...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that the existing tram charging method in the background technology cannot flexibly change the charging strategy according to the line conditions, resulting in a low energy utilization rate, the present invention provides a charging method for a hybrid electric tram, and the specific technical solution is as follows

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