Increased fuel efficiency in ship LVDC power distribution systems

Nebb, Ole Christian; Zahedi, Bijan; Lindtjørn, John Olav; Norum, Lars

doi:10.1109/vppc.2012.6422695

Cited by 17 publications

(9 citation statements)

References 6 publications

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“…As shown in Fig. 1, two system architectures are considered for the low-voltage DC SPS: centralised architecture (or a multidrive approach in [4], [32]) and distributed architectures (or a fully distributed system in [4], [32]). The main difference comes from ways to connect different equipment, e.g., generator-rectifier, rectifier-DC bus, DC bus-inverter and inverter-load.…”

Section: DC Sps Modellingmentioning

confidence: 99%

Extending Protection Selectivity in DC Shipboard Power Systems by Means of Additional Bus Capacitance

Kim

Dujić

2020

IEEE Trans. Ind. Electron.

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DC shipboard power systems have been considered as a promising solution for stricter environmental regulations on ships due to their main benefits in fuel savings with variable speed engines and easy integration of energy storage systems. In order to employ the DC solution in the shipboard power systems, the DC power systems have to be protected from a system fault with protection selectivity to minimise impacts of the fault or to avoid other undesirable situations in the system. For lowvoltage DC shipboard power systems, a three-level protection has been proposed: fast action (1 st)-bus separation by solid-state DC bus-tie switch, medium action (2 nd)feeder protection by high-speed fuse and slow action (3 rd)-generator-rectifier fault controls. This paper proposes a new method by means of additional bus capacitance added in main DC buses to help the reliable operation of the threelevel protection. The principle of the proposed method is introduced and the sizing of the additional bus capacitance is addressed in this paper. With the modelling of the DC shipboard power systems, the analyses of voltage drops for the bus separation failure and fault clearing time for the feeder protection are carried out to verify the proposed method. The results show that the proposed method not only mitigates the voltage drop for the bus separation failure, but also achieves the selectivity and the sensitivity for the feeder protection.

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Section: DC Sps Modellingmentioning

confidence: 99%

Extending Protection Selectivity in DC Shipboard Power Systems by Means of Additional Bus Capacitance

Kim

Dujić

2020

IEEE Trans. Ind. Electron.

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“…In such condition, a DC grid system offers possibilities to integrate ESS, which can compensate the power variation during significant load variations. This will result to improve the dynamic performance of the propulsion system with less fuel consumption [51].…”

Section: ) New System Architecturementioning

confidence: 99%

A Comprehensive Review of Maritime Microgrids: System Architectures, Energy Efficiency, Power Quality, and Regulations

2019

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The recent trends to design more efficient and versatile maritime (both marine and offshore) vessels have attracted significant attention toward high penetration of power electronics systems in electric ship systems, which trigged a variety of power system architectures in civilian and naval ships. The availability of advanced power electronics converters further supported to improve maneuverability, efficiency, and compactness at reduced greenhouse gas emission in marine vessels. The fast-growing penetration of these power electronics converters adds a number of advantages to the ship power system. However, risk factors associated with the quality and reliability of the whole system should be considered. Power quality issues in marine networks have been reported from recent field accidents, therefore, the marine regulatory bodies need to revise and/or develop new power quality standards to ensure the reliability and scrutinize the safety of the whole ship system and crews. This paper presents 1) a classification of marine vessels and their power system architectures; 2) power electronics converters topologies and their non-linear characteristics; 3) control and protection architecture; 4) energy efficiency indicators; 5) a comprehensive case study to elaborate power quality in the marine system, and; 6) extensive discussion about power quality standards and highlights the urgency to update existing power quality standards. INDEX TERMS Marine and ship networks, power system architectures, micro grids, distribution networks, power quality, energy efficiency, regulations, standardization, grid robustness.

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“…The ES makes it possible to reduce load variations of the diesel and the generator, leading to fuel savings, especially during the dynamic positioning (DP) mode of the OSV. A nonlinear programming method has been used to identify the optimal power sharing criteria between the generators and the ES, and a control strategy is presented in [18].…”

Section: Introductionmentioning

confidence: 99%

Methodology of Power Distribution System Design for Hybrid Short Sea Shipping

Lana

Pinomaa

Peltoniemi

et al. 2019

IEEE Trans. Ind. Electron.

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Application of energy storages (ES) in power distribution systems (PDS) of short sea shipping marine vessels is gaining ground. The main drivers are the increasing demand for higher energy efficiency and the decreasing costs of battery energy storage systems (BESS). The feasible chemistry and dimensioning of the BESS depend heavily on the vessel type, the PDS topology, and the load profile. Thus, no general rules for battery dimensioning that would fit all vessels can be presented, but the analysis must be performed by using an advanced modeling approach, which takes into account the above-mentioned factors. This paper presents a modeling methodology for dimensioning marine vessel ES and hybrid PDS components. The methodology has been tested for two distinct vessels, a cruiseferry and an off-shore support vessel (OSV).

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Increased fuel efficiency in ship LVDC power distribution systems

Cited by 17 publications

References 6 publications

Extending Protection Selectivity in DC Shipboard Power Systems by Means of Additional Bus Capacitance

Extending Protection Selectivity in DC Shipboard Power Systems by Means of Additional Bus Capacitance

A Comprehensive Review of Maritime Microgrids: System Architectures, Energy Efficiency, Power Quality, and Regulations

Methodology of Power Distribution System Design for Hybrid Short Sea Shipping

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