Super-capacitors based hybrid converter in marine electric propulsion system

Chen, Wenjie; Adnanses, Alf Kare; Hansen, Jan Fredrik; Lindtjørn, John Olav; Tang, Tianhao

doi:10.1109/icelmach.2010.5607967

Cited by 14 publications

(10 citation statements)

References 2 publications

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“…Conventional PI control and droop control for the converters have been used in many studies to reduce frequency deviations and improve power tracking for load change studies [13][14][15][16]. These control methods have been found to be slower acting and less efficient in rapidly changing loading conditions [17].…”

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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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 gives further support to the possibility of developing a real time MPC strategy for this application. The use of super capacitors to smoothen the power output of the Marine propulsion system has been successfully proven in [8]. A buck boost DC-DC converter for the super capacitor to absorb and discharge power to the network has been used.…”

Section: Energy Storage Control Systemsmentioning

confidence: 99%

“…However, this led to overcharging and inefficiency because when there is an over frequency, the excess charge heats up the resistors resulting in losses. It is worth considering this well established method of integrating energy storage on large land-based networks for ship-based In [8], the electric propulsion system has been simply modeled using a generator, rectifier, super capacitor and a controlled current source that represents a motor. This simple system has been shown to make the load profile from the generating sources smoother despite thruster motor load variations of between 30% and 100% of the peak load.…”

Section: Energy Storage Control Systemsmentioning

confidence: 99%

“…A schematic of the control loops is shown in Figure 8. In [8], the electric propulsion system has been simply modeled using a generator, rectifier, super capacitor and a controlled current source that represents a motor. This simple system has been shown to make the load profile from the generating sources smoother despite thruster motor load variations of between 30% and 100% of the peak load.…”

Section: Energy Storage Control Systemsmentioning

confidence: 99%

“…However, there has been ample evidence in the literature to suggest that energy storage can be a viable option to reduce these transients in a power system for other related applications. An effective control system for energy storage elements has the potential to counter the effect of load changes to a large extent [6][7][8][9][10][11]. This paper reviews the possible energy storage control systems that can be adopted onto ships to reduce the transient conditions in the shipboard power system due to load changes.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Load Changes on Hybrid Shipboard Power Systems and Energy Storage as a Potential Solution: A Review

2017

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More electric technologies (METs) play an important role in meeting ever-growing demands for energy efficiency and emission reduction in the maritime transportation sector. As a result, ships with electrical power transmission are becoming popular compared to traditional mechanical power transmission based ships. Hybrid electric propulsion is an intermediate step in this trend where both mechanical and electrical propulsion technologies are combined to get the benefits of both technologies. In this arrangement, not only the propulsion loads but also non-propulsion loads are connected to a common electrical power bus that could lead to serious power quality issues due to disturbances such as large load changes. This paper presents a comprehensive review on energy storage-based solutions that have been proposed to reduce their effects. The important aspects of existing as well as emerging energy storage control techniques and challenges in reducing transient effects in hybrid shipboard power systems with the use of energy storage are discussed in the paper.

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Energy Storage

Kalaiselvam

2014

Thermal Energy Storage Technologies for Sustainability

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Super-capacitors based hybrid converter in marine electric propulsion system

Cited by 14 publications

References 2 publications

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

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

Effect of Load Changes on Hybrid Shipboard Power Systems and Energy Storage as a Potential Solution: A Review

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