Modelling and Analysis of Electro-Mechanical Interactions between Prime-Mover and Load in a Marine IFEP System

Elders, Ian; Norman, Patrick; Schuddebeurs, J.D.; Booth, Campbell; Burt, Graeme; McDonald, J.R.; Apsley, Judith; Barnes, Mike; Smith, Alexander C.; Williamson, S.; Loddick, S.J.; Myers, I. T.

doi:10.1109/ests.2007.372067

Cited by 15 publications

(8 citation statements)

References 5 publications

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“…Interaction has been observed in a range of systems, for example sub-synchronous resonance in land based power generation [7,8] causing early fatigue of mechanical components [9], challenges for wind power generation [10,11] causing gearbox failure [12], unpredicted faults in industrial processes such as mills [13], excessive vibration in electric and hybrid-electric vehicle drivetrains [2,14] increasing wear [4], and wave induced instability in marine propulsion systems [15]. Methods for mitigating electro-mechanical interaction include minimising gearbox backlash [16], control scheme disturbance rejection [17] and repositioning of resonant modes through design [18].…”

Section: Introductionmentioning

confidence: 99%

Analysis of Electromechanical Interaction in Aircraft Generator Systems

Feehally

Damian

Apsley

2016

IEEE Trans. on Ind. Applicat.

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Abstract-The supply of electrical power is usually achieved by a generator, driven from a prime mover, by some form of mechanical drivetrain. Such an electro-mechanical system will have natural resonant modes in both the electrical and mechanical subsystems. The electrical generator provides a coupling between the subsystems, transferring not only useful power but also disturbances between electrical and mechanical domains: these disturbances may excite resonances resulting in cross-domain (electro-mechanical) interaction. This can lead to lifetime reduction in the mechanical components and instability in the electrical network, resulting in poor reliability for the wider system, and potentially catastrophic component failure. Electro-mechanical interaction is particularly critical in power generation systems onboard aircraft, because the generator is driven by a gas turbine via an inherently low-stiffness drive train. It is then critical to identify electro-mechanical interaction at the design stage so that these issues can be avoided. However, predicting the occurrence of interaction, through simulation, is challenging, requiring multi-domain models, operating with different time scales. This paper analyses an aircraft auxiliary power offtake to produce a reduced-order mechanical drivetrain model, allowing the modal frequencies to be predicted and crossdomain interactions to be modelled. A purpose-built electromechanical test platform is used to validate the model and demonstrate how electrical disturbances are passed through the generator to the mechanical system and affect the electrical network. Future research will use the test bed to demonstrate strategies for avoiding or suppressing unwanted interactions.

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Section: Introductionmentioning

confidence: 99%

Analysis of Electromechanical Interaction in Aircraft Generator Systems

Feehally

Damian

Apsley

2016

IEEE Trans. on Ind. Applicat.

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“…However, the disturbance is clear in the motor torque and is passed back through to the supply current. This has implications for the power network, which has been shown in a separate study [20] to be sensitive to low-frequency changes in load power, demonstrating the value of an integrated electromechanical simulation tool.…”

Section: Validationmentioning

confidence: 82%

Propulsion Drive Models for Full Electric Marine Propulsion Systems

Apsley

Gonzalez-Villasenor

Barnes

et al. 2009

IEEE Trans. on Ind. Applicat.

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103

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Integrated full electric propulsion systems are being introduced across both civil and military marine sectors. Standard power system analysis packages cover electrical and electromagnetic components but have limited models of mechanical subsystems and their controllers. Hence, electromechanical system interactions between the prime movers, power network, and driven loads are poorly understood. This paper reviews available models of the propulsion drive system components: the power converter, motor, propeller, and ship. Due to the wide range of time constants in the system, reduced-order models of the power converter are required. A new model using state-averaged models of the inverter and a hybrid model of the rectifier is developed to give an effective solution combining accuracy with speed of simulation and an appropriate interface to the electrical network model. Simulation results for a typical ship maneuver are presented.

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“…Simulation control is an essential part of modeling [70] to determine the equation of motion of the vessel by setting predetermined acceleration and deceleration of the generators as well as a prime mover tripping condition. The propulsion subsystem is a unique part of the power system of maritime microgrids and has been extensively discussed [10], [71]. There are several approaches to modeling this subsystem.…”

Section: A Power Systems Modelingmentioning

confidence: 99%

“…Finally, power quality monitoring can be a part of a more unified ship power management system with higher efficiency. The propagation of large power disturbances from one node of the power system to another can influence the strategic placement of equipment installation such as filters and power system operating decisions [10], [71]. However, it will require the proper design of power management control algorithms for concurrent management and integration of power quality information in the said systems.…”

Section: Improvements Of Power Quality In Ship Systemsmentioning

confidence: 99%

Review of Power Quality Issues in Maritime Microgrids

et al. 2021

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This paper discusses contemporary problems concerning ship microgrids. It focuses on the role of power electronics and power quality issues, both conventional, such as voltage and frequency variations, and new issues, such as waveform distortions ensuing from the wide proliferation of power electronics in ship microgrids. The paper also contains a discussion on the provisions of the Unified Requirements of International Association of Classification Societies and other leading power quality standards in the industry, with an emphasis on Total Harmonic Distortion (THD) definition. An overview of power converters for high power applications in ships and their impact on ship networks is also given. Next, original results of various power quality phenomena recorded in ship microgrids are presented and commented on, followed by a review and recommendations for maritime microgrid modeling and signal processing methods for power quality assessment in the discussed systems. Finally, preliminary proposals for power quality control are presented.

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Modelling and Analysis of Electro-Mechanical Interactions between Prime-Mover and Load in a Marine IFEP System

Cited by 15 publications

References 5 publications

Analysis of Electromechanical Interaction in Aircraft Generator Systems

Analysis of Electromechanical Interaction in Aircraft Generator Systems

Propulsion Drive Models for Full Electric Marine Propulsion Systems

Review of Power Quality Issues in Maritime Microgrids

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