Hybrid-energy-storage-based tire type gantry crane power system and control strategy thereof

Abstract

The invention discloses a hybrid-energy-storage-based tire type gantry crane power system and a control strategy thereof. The hybrid-energy-storage-based tire type gantry crane power system is mainly composed of a super capacitor bank, a lithium battery pack, a PCS energy storage converter, a bidirectional DC-DC converter, an energy management control system and the like. Energy exchange between hybrid energy storage and the gantry crane power system and auxiliary electricity is completed through the PCS energy storage converter, the bidirectional DC-DC converter, a rectifier and a direct-current common bus. According to the hybrid-energy-storage-based tire type gantry crane power system and the control strategy thereof, the characteristic of high specific energy of a lithium battery is utilized to completely replace a diesel generator set, so that a gantry crane is made to have the long-time operation capability; and the characteristics of high specific power and high cycle life of a super capacitor are utilized, peak power is provided during lifting of the gantry crane, all braking energy is borne during regenerative braking, the discharging power and the charging and discharging frequency of the lithium battery pack are effectively reduced, and the service life of the lithium battery pack is prolonged.

Description

technical field [0001] The invention relates to the field of power supply systems for port tire-type container gantry cranes, in particular to a tire-type gantry crane power system based on hybrid energy storage and a control strategy thereof. Background technique [0002] Under the joint action of the global push to tackle climate change and other factors, the clean and low-carbon development of port energy has become a general trend. As the main loading and unloading equipment in the container terminal yard, the rubber-tyred gantry crane (RTG) has great potential to realize the substitution of electric energy. [0003] The patent specification with the notification number CN 201726136 U discloses a central control system for regulating the output of generator sets and energy storage components, including a diesel generator set and a gantry crane, and a rectifier and an inverter are connected in series between the generator set and the gantry crane. The rectifier and the i...

AI Technical Summary

Problems solved by technology

[0006] 1) Some ports are limited by the power supply system or investment scale, and cannot apply the "oil-to-electricity" technology; 2) "oil-to-electricity" gantry cranes cannot complete the transfer operation. In order to meet the needs of the transfer operation, the port often configures a certain number of Hybrid (diesel engine + lithium battery) gantry cranes cannot achieve "zero emission" of gantry cranes in all ports;

[0007] 3) The gantry crane is frequently raised / lowered and the instantaneous power can reach more than 300kW. For the "oil-to-electricity" gantry crane, there is an impact on the power grid; life requirements

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