Comparison of short-circuit current in AC and DC shipboard electrical power distribution systems: A case study of 17,500 DWT tanker vessel

Gumilang, Ahlur R.N.; Kurniawan, Akbar; Sarwito, Sardono; Budianto, Firman; Kurniawan, Akhmad R.

doi:10.1088/1755-1315/972/1/012072

Cited by 6 publications

(3 citation statements)

References 5 publications

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“…Nevertheless, the possibility to apply DC shipboard distribution system is still being studied continuously as the advantages are very tempting. Ongoing research involves feasibility studies with current technologies and also development of the technologies to allow the implementation [16]- [18].…”

Section: Introductionmentioning

confidence: 99%

Short-circuit current analysis of DC distribution system in a ship with non-electric propulsion

Kurniawan,

Gumilang,

Sarwito

et al. 2024

IJAPE

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Converting conventional AC radial shipboard distribution system to DC system has been recognized as a potential high impact solution to reduce ship’s fuel consumption. As big ships in Indonesia commonly use low voltage AC (LVAC) distribution system an effort to apply low voltage direct current (LVDC) distribution system without replace the propulsion system is a plausible choice. However, technical and economical investigations are required before recommendation to convert the shipboard distribution system to LVDC is officially launched. In this study, technical aspect in the term of short-circuit current is discussed. The goal of this study is to analyze how much the impact on the short-circuit current when LVDC system replaces LVAC system. The impact may affect the feasibility of LVDC system as the short-circuit current in a system dictate the scheme and capacity of the protection devices. Numerical simulations on a sample vessel are performed to obtain the profile of maximum short-circuit currents on all panels. The results show that the utilization of LVDC system decreases the short-circuit current by 10 times. Further investigations on the economic aspect needs to be performed to give clearer view of the feasibility of the LVDC system.

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Section: Introductionmentioning

confidence: 99%

Short-circuit current analysis of DC distribution system in a ship with non-electric propulsion

Kurniawan,

Gumilang,

Sarwito

et al. 2024

IJAPE

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“…Moreover, the addition of photovoltaic as a power source will increase the value of the short circuit current in the existing system [6].…”

Section: Introductionmentioning

confidence: 99%

Short Circuit Analysis due to Reconfiguration of AC to DC Electric Power System on Tanker Ship with Hybrid Energy Source

Kurniawan,

Almonda,

Sarwito

2024

IJOCE

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The conventional AC electric power distribution system on ships has a higher impedance than the DC system, thus providing more significant distribution losses. Due to the enormous losses in the distribution system, a larger power output is required to balance the power required by the loads, and the losses occur on the line between the sources and the loads. Therefore, reconfiguring the power distribution to the DC system is promising. However, analysis in other aspects needs to be performed, including for short circuit current. In this research, power system simulator software is used to analyze the amount of fault current that contributes to each type of distribution. The simulation is performed under four ship operation modes, including sailing, maneuvering, at port, and cargo loadingunloading. The results of the simulation show that the shortcircuit current can be significantly decreased after the reconfiguration of the system. A similar phenomenon has occurred in other operation modes. The short circuit value decreases around ten times in the DC system compared to the AC system. Therefore, the DC system is safer than the AC system.

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“…According to the Classification Code for Steel Sea-going Vessels (2022) and Closed-loop Power Positioning System Inspection Guidelines (2020) issued by the China Classification Society (CCS), all newly built ships must undergo a short-circuit testing within the ship's electrical power system. Gumilang et al [3] simulated a certain 17, 500 DWT tanker power distribution system by using software and indicated that, for the same ship, the short-circuit current of the DC power distribution system is lower than that of the AC power distribution system. In this paper, using Simulink simulation software and a 300, 000 DWT oil tanker as an example, we simulate the short-circuit faults during the ship's electrical power system operations and analyze how the faults affect the stability in the marine…”

Section: Introductionmentioning

confidence: 99%

Simulation and analysis of short circuit fault in ship power system based on simulink

Li,

Yang,

Wang

et al. 2024

J. Phys.: Conf. Ser.

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In this paper, a short-circuit fault simulation of a ship’s electrical power system is carried out based on Simulink. According to the power system sketch of the ship, a simulation model is built, initial conditions are set, two-phase short-circuit faults and three-phase short-circuit faults are simulated, and the simulation results are analyzed. The results show that the short-circuit fault has a large impact on both the generator side and the load side, in which the impact on the load side is more serious. At the generator side, the voltage of the corresponding phase drops by about 1/3-1/2, and the current increases by about 1.5 times. At the load side, when a two-phase short circuit occurs, the voltage drops to half of the original one, and when a three-phase short circuit occurs, the voltage drops to 0. The short-circuit current has the largest value at the beginning of the short circuit, then oscillates and decays, and finally stabilizes at about 15 times the normal working current.

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Comparison of short-circuit current in AC and DC shipboard electrical power distribution systems: A case study of 17,500 DWT tanker vessel

Cited by 6 publications

References 5 publications

Short-circuit current analysis of DC distribution system in a ship with non-electric propulsion

Short-circuit current analysis of DC distribution system in a ship with non-electric propulsion

Short Circuit Analysis due to Reconfiguration of AC to DC Electric Power System on Tanker Ship with Hybrid Energy Source

Simulation and analysis of short circuit fault in ship power system based on simulink

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