Hybrid power tyre crane energy-saving system

Abstract

The invention relates to the electric control technical field of cranes, in particular to a hybrid power tyre crane energy-saving system which comprises an electric generator and a rectifying device connected with the electric generator, wherein the rectifying device converts an alternating- current power into a direct-current power and supplies the direct-current power to a frequency transformer through a direct-current bus. An energy exchange device is arranged on the direct-current bus and comprises a programmable controller, a boost controller arranged on the direct-current bus, a charge / discharge controller connected to the direct-current bus between the boost controller and the frequency transformer, and a storage battery system connected to the charge / discharge controller, wherein the programmable controller exchanges data with the boost controller, the charge / discharge controller and the storage battery system through fieldbuses, and the storage battery system comprises a storage battery, a state sensor, a protective circuit, a cooling and ventilation device and a storage battery manager. The hybrid power tyre crane energy-saving system has favorable energy-saving effect, reduces pollution to the atmosphere, lowers the noise of an electric generator and supplies stable direct-current bus voltage to a RTG system.

Description

technical field [0001] The invention relates to the technical field of electric control of cranes, in particular to a hybrid power tire crane energy-saving system. Background technique [0002] In the container terminal of the port, the yard operation mainly relies on the Rubber Tire Gantry Crane (RTG for short). Because RTG uses diesel generator set as the power to provide the whole system. There is no need for cables to connect to the terminal power supply, so it is easy to use and flexible in operation, and is widely used by container terminals. [0003] In recent years, the energy shortage, rising oil prices, high loading and unloading costs. "How to improve the energy efficiency of RTG" has long been the target of energy-saving renovation. Looking at the numerous RTG energy-saving methods, they are mainly divided into three categories according to energy-saving strategies. The first is to adopt "oil to electricity", which can greatly reduce the cost of use. The disa...

AI Technical Summary

Problems solved by technology

The main manifestations are: 1. Usually, only the energy generated during one descent can be stored. If the container is continuously hoisted from a high place for loading, the subsequent energy can only be consumed through the energy consumption resistor

These energy storage devices have no staying power. If the capacity needs to be increased, its high cost, huge volume and resulting weight are unacceptable for the RTG system; 2. Due to the inherent characteristics of these energy storage devices, each energy release cannot be completely consumed For example: the flywheel system must maintain a certain basic speed, and it cannot run in the low speed area

The supercapacitor must have sufficient voltage, the system cannot work properly when the voltage is too low

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