Abstract
In order to improve the energy efficiency and economic effect of conventional diesel-powered rubber-tired gantry (RTG) cranes in container terminals, various hybrid RTG cranes were studied. However, these current hybrid RTG cranes have several disadvantages, such as high initial investment cost and poor versatility of energy management methods. In this paper, a hybrid RTG crane consisting of a small-sized diesel generator (DG), a ternary material lithium battery, and a supercapacitor (SC) is studied, and a hybrid RTG crane energy management method based on game theory is proposed. The DG, lithium battery, and SC are modeled as three independent agents to participate in the game, and a multi-agent system (MAS) is established. During the RTG crane work process, agents achieve a coordinated and stable working state through the game, i.e., the Nash equilibrium. Three typical crane operation scenarios, the rated load, continuous work, and intermittent work, are simulated and studied. According to the results, combinations of the three devices can meet the power demand and system performance. The power of the DG in the hybrid system is small (only 20 kW), reducing fuel consumption and overall emissions during RTG crane operation.
Highlights
Container ports are important hubs for world commodity trade, where rubber-tired gantry (RTG)cranes undertake container operations in the yard area and are the most common lifting equipment in container ports
When an RTG crane puts down a container, the lift motor acts as a generator, generating regenerated energy
The hybrid RTG crane consisted of a 20-kW diesel generator (DG), a 73.9-kWh lithium battery pack, and a
Summary
Container ports are important hubs for world commodity trade, where rubber-tired gantry (RTG)cranes undertake container operations in the yard area and are the most common lifting equipment in container ports. The conventional RTG crane uses a diesel generator (DG) as the sole source of energy; due to the variable load of RTG cranes, the fuel efficiency of DG is low and generates exhaust gas during operation. It goes against the principles of energy conservation and environmental protection. An RTG crane starts and brakes frequently while working, and has a high frequency of mutual conversion between potential energy and electric energy. When an RTG crane puts down a container, the lift motor acts as a generator, generating regenerated energy. The electric RTG cranes can feed this energy back to the grid [2]
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
