Ground battery and super capacitor hybrid energy storage system and management method thereof

Abstract

The invention relates to the technical field of urban rail transit regenerative braking energy utilization, and discloses a ground battery and super capacitor hybrid energy storage system and a management method thereof. The method is characterized by comprising the following steps of 1, adopting HESS for urban rail transit traction network energy flow, 2, putting forward a control method based ona parallel double-loop structure, 3, in the control method, considering giving of a voltage outer loop instruction value in the charging process, 4, braking the train, and 5, starting an energy storage element. The invention discloses a ground battery and super capacitor hybrid energy storage system and a management method thereof. Based on the defects of an existing typical urban rail ground hybrid energy storage device control structure, a control method based on a parallel double-loop structure is put forward, starting of braking resistance and air braking can be effectively reduced, and therefore energy loss and brake shoe loss are reduced, and the energy-saving rate of an energy storage device is increased.

Description

technical field [0001] The invention relates to the technical field of urban rail transit regenerative braking energy utilization, in particular to a ground-type battery and supercapacitor hybrid energy storage system and a management method thereof. Background technique [0002] With its relatively low ratio of energy consumption to transport capacity, urban rail transit has become an increasingly common choice to meet the transportation needs of countries all over the world. According to statistics, the braking energy of trains accounts for about 30-60% of the traction energy, effectively Using this part of regenerative braking energy can greatly reduce the energy consumption of train operation, thereby improving the energy saving effect. In order to recover regenerative braking energy and stabilize the network voltage, more and more energy storage devices are installed in the traction power supply system, batteries, Flywheels and supercapacitors are commonly used energy s...

AI Technical Summary

Problems solved by technology

[0007] Aiming at the deficiencies of the prior art, the present invention provides a ground-type battery and supercapacitor hybrid energy storage system and its management method, which can effectively reduce braking resistance and start-up of air braking, thereby reducing energy loss and brake shoe loss , improve the energy-saving rate of the energy storage device and other advantages, and solve the problem of maintaining the same voltage outer ring threshold under different working conditions, which is not conducive to the respective energy storage advantages of the battery and super capacitor, which will cause braking resistors and air brakes to start Frequently, the energy is dissipated in the form of heat energy, which not only causes energy waste, but also brings problems of tunnel temperature rise and brake shoe loss

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