Power supply method and connection configuration for train power network on magnetic suspension train without power tracks

Abstract

The power supply method for train power network on magnetic suspension train without power tracks features that the rechargeable accumulator pack powers the power network load on the train under the control of power network controller based on chaotic control policy via the power network distributor during cutoff, startup and emergency braking; the accumulator pack together with the linear power generator on the train powers the power network load on the train in low speed section; and the linear power generator on the train powers the power network load on the train while the stepup chopper of the power network on the train power the accumulator pack to ensure the 70-90 % rated capacity in high speed section. The present invention solves the technological problem for the accumulator pack in the train to power the power network on the trani without auxiliary power supply tracks.

Description

Technical field: [0001] The invention belongs to vehicle power supply, in particular to a power supply method for a vehicle-mounted power grid of a maglev train without a power supply rail and the configuration of the vehicle-mounted power grid. Background technique: [0002] As a new type of high-speed rail transit concept, the maglev train is still in the experimental operation stage in developed countries since it was proposed in the last century, and has not yet been officially put into commercial operation. One of the important reasons for this situation is that many technical measures of maglev trains are limited by the current high-tech integrated production level, resulting in excessive investment and lack of economy. For example, the current maglev train uses power supply rails and current receivers to provide auxiliary power supply to the vehicle power grid is an example. Unlike electric locomotives that obtain traction and power from the overhead catenary, maglev...

AI Technical Summary

Problems solved by technology

The high-conductivity wear-resistant alloy material used for the power supply rail is expensive in itself, and the quality requirements for laying it are high, so the infrastructure cost of the maglev train line is high

At the same time, in the low-speed road section, the current receiver is in frequent contact with the power supply rail, the sliding friction loss is large, the workload of inspection and maintenance is also increased, and the operation and maintenance costs are correspondingly increased.

As we all know, nickel-cadmium batteries have a strong memory effect, and the working state of shallow charge and shallow discharge will greatly reduce their high-power repeated discharge efficiency. Therefore, the existing maglev trains only use the on-board nickel-cadmium batteries as a backup for train eddy current emergency braking. For power supply, each car is equipped with 8 440V, 27Ah nickel-cadmium battery boxes (each box is composed of 1.2V, 27Ah single-cell nickel-cadmium batteries connected in series), and the total storage energy is 47.52kw / h

Moreover, these nickel-cadmium batteries must be regularly taken out and re-formed for maintenance, which also increases the cost.

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