Electric Ship Technologies

Dale, S.J.; Hebner, Robert E.; Sulligoi, Giorgio

doi:10.1109/jproc.2015.2497018

Cited by 26 publications

(13 citation statements)

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“…1. During its over 30 years' service, the inadequacies of Queen Elizabeth II's power system have been noticed by researchers, such as: unwanted problems of reactive power, synchronization and harmonics as well as the problem of volume and weight [1]. Thanks to the rapid development of modern power electronic technologies, high-frequency DC/DC converters have already enabled conveniently changing of voltage levels in DC systems.…”

Section: DC Power Architecture and Onboard Energy Storagementioning

confidence: 99%

“…Maritime power system can be traced back to the 1880s, starting with the earliest record of DC based shipboard power system at the SS Columbia, where Edison's DC lighting system was firstly installed. In the following century, maritime power system has developed greatly along with the increasing demand of onboard electrical power demands [1]. In the 1987, the refit of the Queen Elizabeth II made it become world's first cruise vessel using fully electric propulsion system as well as integrated diesel-electric power system, or in another word, the world's first all-electric ship (AES) in the real sense.…”

Section: Introductionmentioning

confidence: 99%

“…Hence, the onboard power system is required to be highly reliable and fault-tolerant. At present, the shipbuilding industry applies "N+X" redundant power plant design and complex switchboards [1]. Since the DC based IPS could be regarded as a cluster of interconnected DC microgrids, it allows the entirety or part of on-board power system split into several natural cabin DC microgrids when a fault is detected.…”

Section: Introductionmentioning

confidence: 99%

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Maritime DC microgrids - a combination of microgrid technologies and maritime onboard power system for future ships

Jin

Savaghebi

Vasquez

et al. 2016

2016 IEEE 8th International Power Electronics and Motion Control Conference (IPEMC-ECCE Asia)

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DC power distribution system is being considered as an attractive alternative to its traditional AC counterpart in many fields of applications and, in particular, for maritime onboard power systems. The adoption of DC power architecture would bring a broad range of benefits to the onboard power system. Not only frequency-related constraints are eliminated, which allows high-speed smaller generators to be used, but also new fault-tolerant configurations involving power electronics, generation control, as well as smart systemic management. For these reasons, DC power systems become natural alternative to the conventional AC power systems in the field of future maritime applications. Moreover, the inevitable cabin structure of maritime applications naturally separate the large-scale power system into several zonal parts. Furthermore, it is expected that the zonal parts can maintain autonomous power supply for a short time, which make the system highly consist with DC microgrids. In this content, it is foreseeable that the advanced research outcomes in the field of DC microgrid are also compatible with maritime onboard power systems. In this paper, DC power architectures, control and coordination methods, and specific issues of maritime onboard power system, fuel efficiency optimization and systemic reconfiguration are outlined, referring to state-of-the-art realizations as well as to novel concept designs presently under development and investigation.

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Section: DC Power Architecture and Onboard Energy Storagementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Maritime DC microgrids - a combination of microgrid technologies and maritime onboard power system for future ships

Jin

Savaghebi

Vasquez

et al. 2016

2016 IEEE 8th International Power Electronics and Motion Control Conference (IPEMC-ECCE Asia)

View full text Add to dashboard Cite

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“…Broadly, it has been observed that the number of battery-operated vessels has increased greatly during the last five years [36]. Shipping technology has progressed very rapidly, mainly in the areas of propulsion and power supply topologies [37]. In the coming few years, research and development in multiple technologies such as BESS, power electronics and information technology can open a modern era for vessels by employing wireless charging of batteries [38], as well as real-time measurement and monitoring of the fundamental ship parameters [12].…”

Section: Introductionmentioning

confidence: 99%

Design and Analysis of New Harbour Grid Models to Facilitate Multiple Scenarios of Battery Charging and Onshore Supply for Modern Vessels

et al. 2019

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The main objective of this study is to develop and analyse different harbour grid configurations that can facilitate the charging of batteries for modern vessels and supply onshore power. The use of battery energy storage systems in modern hybrid or entirely electric vessels is rapidly increasing globally in order to reduce emissions, save fuel and increase energy efficiency of ships. To fully utilise their benefits, certain technical issues need to be addressed. One of the most important aspects is to explore alternative ways of charging batteries with high power capacities for modern vessels. The paper presents a comprehensive overview of battery-charging configurations and discusses the technical challenges of each design from the perspective of their practical implementation, both onshore and onboard a vessel. It is found that the proposed models are suitable for vessels operating either entirely on battery storage or having it integrated into the onboard power system. Moreover, the proposed charging models in a harbour area can solve the problem of charging batteries for future hybrid and electric vessels and can open new business opportunities for ship owners and port administrators. The performance of the proposed models is validated by simulating two case studies in PSCAD: slow charging (based onshore) and fast charging (based onboard).

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“…One of the key developments is electrification in the form of electric traction or electric propulsion. In view of recent legislation involving the creation of Emission Control Areas (ECAs) [1], ships with electric propulsion have become more of a reality with more cruise ships, ice breakers and various types of service vessels adopting this technology [2]. However, hybrid propulsion is a convenient waypoint between traditional mechanical propulsion and fully-electric propulsion as it combines the two, thereby reducing the need for a complete revamp of the propulsion system in very large ships such as container vessels.…”

Section: Introductionmentioning

confidence: 99%

Frequency Transient Suppression in Hybrid Electric Ship Power Systems: A Model Predictive Control Strategy for Converter Control with Energy Storage

2018

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This paper aims to understand how the common phenomenon of fluctuations in propulsion and service load demand contribute to frequency transients in hybrid electric ship power systems. These fluctuations arise mainly due to changes in sea conditions resulting in significant variations in the propulsion load demand of ships. This leads to poor power quality for the power system that can potentially cause hazardous conditions such as blackout on board the ship. Effects of these fluctuations are analysed using a hybrid electric ship power system model and a proposed Model Predictive Control (MPC) strategy to prevent propagation of transients from the propellers into the shipboard power system. A battery energy storage system, which is directly connected to the DC-link of the frequency converter, is used as the smoothing element. Case studies that involve propulsion and service load changes have been carried out to investigate the efficacy of the proposed solution. Simulation results show that the proposed solution with energy storage and MPC is able to contain frequency transients in the shipboard power system within the permissible levels stipulated by the relevant power quality standards. These findings will help ship builders and operators to consider using battery energy storage systems controlled by advanced control techniques such as MPC to improve the power quality on board ships.

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Electric Ship Technologies

Abstract: The articles in this special issue provides a comprehensive treatment of the history of electric ship propulsion, the present status of both commercial and military electric ships, and the ongoing research that will lead to the fully integrated all-electric ship

Cited by 26 publications

References 0 publications

Maritime DC microgrids - a combination of microgrid technologies and maritime onboard power system for future ships

Maritime DC microgrids - a combination of microgrid technologies and maritime onboard power system for future ships

Design and Analysis of New Harbour Grid Models to Facilitate Multiple Scenarios of Battery Charging and Onshore Supply for Modern Vessels

Frequency Transient Suppression in Hybrid Electric Ship Power Systems: A Model Predictive Control Strategy for Converter Control with Energy Storage

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