Fault Scenarios in DC Ship Grids: The advantages and disadvantages of modular multilevel converters

Staudt, V.; Bartelt, Roman; Heising, Carsten

doi:10.1109/mele.2015.2413436

Cited by 22 publications

(12 citation statements)

References 1 publication

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“…DC systems are nowadays attractive, specially for low power range [29], since, in respect to traditional AC systems, these solutions may lead to a not negligible reduction of weight and distribution losses, improving in general the system efficiency. On the contrary, DC systems require to deal with problems related to low short-circuit currents, dc-breaker technology, and system standardization [30,31].…”

Section: Revamping Project Overviewmentioning

confidence: 99%

Development of a Multiphysics Real-Time Simulator for Model-Based Design of a DC Shipboard Microgrid

et al. 2020

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Recent and strict regulations in the maritime sector regarding exhaust gas emissions has led to an evolution of shipboard systems with a progressive increase of complexity, from the early utilization of electric propulsion to the realization of an integrated shipboard power system organized as a microgrid. Therefore, novel approaches, such as the model-based design, start to be experimented by industries to obtain multiphysics models able to study the impact of different designing solutions. In this context, this paper illustrates in detail the development of a multiphysics simulation framework, able to mimic the behaviour of a DC electric ship equipped with electric propulsion, rotating generators and battery energy storage systems. The simulation platform has been realized within the retrofitting project of a Ro-Ro Pax vessel, to size components and to validate control strategies before the system commissioning. It has been implemented on the Opal-RT simulator, as the core component of the future research infrastructure of the University of Genoa, which will include power converters, storage systems, and a ship bridge simulator. The proposed model includes the propulsion plant, characterized by propellers and ship dynamics, and the entire shipboard power system. Each component has been detailed together with its own regulators, such as the automatic voltage regulator of synchronous generators, the torque control of permanent magnet synchronous motors and the current control loop of power converters. The paper illustrates also details concerning the practical deployment of the proposed models within the real-time simulator, in order to share the computational effort among the available processor cores.

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Section: Revamping Project Overviewmentioning

confidence: 99%

Development of a Multiphysics Real-Time Simulator for Model-Based Design of a DC Shipboard Microgrid

et al. 2020

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“…1) Severe transient discharge: In the dc SPS, the current is limited by a very low ohmic resistance. During the short-circuit, the entire grid is affected by almost same intensity of fault current [34] which challenges the selective operation of the fault detection algorithm thus resulting in limited fault localization. 2) Lack of current zero crossing: The arc extinguishing becomes a difficult task due to the lack of zero current crossing in the dc system.…”

Section: Faults In DC Spsmentioning

confidence: 99%

Short-Circuit Fault Management in DC Electric Ship Propulsion System: Protection Requirements, Review of Existing Technologies and Future Research Trends

Satpathi

Ukil

Pou

2018

IEEE Trans. Transp. Electrific.

108

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“…One of the reasons for this was that the early dc systems (without power electronics) needed rotating devices to transform the power from one voltage level to another [23]. The ac power system has been the most used power system in marine vessels, but now, with modern power electronics and other technological advantages, the discussion of using dc or ac distribution in shipboard power systems has been brought to the table and some of the key points whether to use ac or medium-voltage dc (MVdc) are (adopted from [20], [24]- [26]):…”

Section: A Ac Vs DCmentioning

confidence: 99%

“…Even though the MVdc solution may lead to reduced weight, increased efficiency, and offer highenergy transport capability at low losses, challenges such as short-circuit currents, dc-breaker technology, and system standardization must be solved [24]. The different power system solutions, whether it is pure ac, a hybrid between ac and dc or pure dc, have different properties, advantages and disadvantages.…”

Section: A Ac Vs DCmentioning

confidence: 99%

Past, Present, and Future Challenges of the Marine Vessel’s Electrical Power System

Skjong

Volden

Rodskar

et al. 2016

IEEE Trans. Transp. Electrific.

190

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Abstract-The evolution of the use of electricity in marine vessels is presented and discussed in this article in an historical perspective. The historical account starts with its first commercial use in the form of light bulbs on the SS Columbia in 1880 for illumination, going forward through use in hybrid propulsion systems with steam turbines and diesel engines and then transitioning to the present with the first fully electric marine vessel based entirely on the use of batteries in 2015. Electricity use is discussed not only in the light of its many benefits but also of the challenges introduced after the emergence of the marine vessel electrical power system. The impact of new conversion technologies like power electronics, battery energy storage, and the DC power system on overall energy efficiency, power quality, and emission level is discussed thoroughly. The article guides the reader through this development, the present and future challenges by calling attention to the future research needs and the need to revisit standards that relate to power quality, safety, integrity, and stability of the marine vessel power system, which are strongly impacted by the way electricity is used in the marine vessel.

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Fault Scenarios in DC Ship Grids: The advantages and disadvantages of modular multilevel converters

Cited by 22 publications

References 1 publication

Development of a Multiphysics Real-Time Simulator for Model-Based Design of a DC Shipboard Microgrid

Development of a Multiphysics Real-Time Simulator for Model-Based Design of a DC Shipboard Microgrid

Short-Circuit Fault Management in DC Electric Ship Propulsion System: Protection Requirements, Review of Existing Technologies and Future Research Trends

Past, Present, and Future Challenges of the Marine Vessel’s Electrical Power System

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