评估岸对船快速充电系统的能量转移效果

Kulat Hemat Sahebrao
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引用次数: 0

摘要

从岸上到船上的充电系统通常根据一系列操作和设计参数进行设计,包括船上电力和推进需求、可用充电时间以及当地电力网络的容量。在电网基础设施薄弱的地区,通常会采用岸上储能技术,为需要短时间充电的船只提供大功率充电。然而,采用岸上储能技术会增加系统的复杂性,而且系统配置的选择会严重影响从电网到船舶的能量传输效率。本研究对使用交流和直流推进系统的短途渡轮的交流、直流和感应式岸对船充电解决方案的能效进行了比较分析。研究结果表明,在充电过程中,对岸上电池电源依赖的增加与整体能效的降低有关。因此,在电网和陆上电池之间分配负载时,必须仔细考虑优化能源效率的问题。结果表明,对于交流推进系统而言,直流充电在能效方面比其他解决方案更具优势。然而,对于直流推进系统,最有效的解决方案可能是直流充电或交流充电,这取决于电网和陆上电池之间的负载分配。此外,尽管系统增加了额外的转换阶段和复杂性,但可以推断感应充电的能效与有线方案相当。考虑到非接触式充电的额外优势,如可靠性、安全性和稳健性,这些研究结果主张采用感应式充电作为一种有前途的解决方案。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Assessment of the Effectiveness of Energy Transfer for Shore-to-Ship Fast Charging Systems
Charging systems from shore to ship are typically designed based on a range of operational and design parameters, encompassing onboard power and propulsion needs, available charging durations, and the capacity of local power networks. In areas with weak grid infrastructure, onshore energy storage is often employed to facilitate high-power charging for vessels requiring short charging intervals. Nevertheless, incorporating on-shore energy storage adds complexity to the system, and the selection of system configuration can profoundly affect the efficiency of energy transfer from the grid to the vessel. This study presents a comparative analysis of energy efficiency among AC, DC, and Inductive shore-to-ship charging solutions for short-distance ferries utilizing both AC and DC-based propulsion systems. Findings illustrate that an increased reliance on onshore battery power correlates with decreased overall energy efficiency during the charging process. Thus, optimizing energy efficiency necessitates careful consideration when distributing the load between the grid and onshore battery. Results indicate that DC charging offers advantages over other solutions for AC-based propulsion systems in terms of energy efficiency. However, for DC-based propulsion systems, the most efficient solution may be either DC or AC charging, contingent upon the distribution of load between the grid and onshore battery. Furthermore, it is inferred that despite adding additional conversion stages and complexity to the system, the energy efficiency of inductive charging is comparable to wired schemes. Considering the added benefits of contactless charging, such as reliability, safety, and robustness, these findings advocate for the adoption of inductive charging as a promising solution.
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