New marine harmonic standards

Hoevenaars, Tony; Evans, I.C.; Lawson, Aaron

doi:10.1109/mias.2009.934965

Cited by 40 publications

(14 citation statements)

References 1 publication

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“…This is mainly due to the high percentage of non-linear load units often interfaced through thyristor or diode rectifiers, both of which are known to consume significant amounts of harmonic current. There are several standards for allowed distortion levels [4] [5] [6], and typically the voltage THD must be limited to 5 % or 8 %.…”

Section: Introductionmentioning

confidence: 99%

Handling system harmonic propagation in a diesel-electric ship with an active filter

Årdal

Skjong

Molinas

2015

2015 International Conference on Electrical Systems for Aircraft, Railway, Ship Propulsion and Road Vehicles (ESARS)

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Abstract-Harmonic distortion is often a challenge in marine vessel power systems due to the presence of large motor drives containing diode or thyristor rectifiers. Governing standards impose requirements on bus voltage Total Harmonic Distortion (THD) which can be demanding to fulfil. An attractive measure to reduce THD is to use 12-pulse rectifiers, as they are known to cancel the 5 th and the 7 th harmonic. However, the added cost and space of this solution compared with standard 6-pulse rectifiers is significant. This paper proposes to base propulsion motor drives on 6-pulse rectifiers, and mitigate harmonic problems by means of power electronic based active filters. A detailed numeric simulation model is developed for evaluating the performance of the topology. A case study system is defined consisting of two propulsion motor drives and two synchronous generators. The active filter greatly improves the bus voltage THD in all defined simulation cases. The performance is also better than a corresponding system using 12-pulse rectifiers and no active filter.

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Section: Introductionmentioning

confidence: 99%

Handling system harmonic propagation in a diesel-electric ship with an active filter

Årdal

Skjong

Molinas

2015

2015 International Conference on Electrical Systems for Aircraft, Railway, Ship Propulsion and Road Vehicles (ESARS)

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“…If, for some reasons, the VSC changes its modulation frequency the LCL filters have to be re-tuned. In addition, the harmonics from a VSC may cause harmonic resonances due to interaction with passive filters [43]. Hence, harmonic pollution can, to some extent, be suppressed by design, but the ever-increasing number of electrical devices, which are directly or indirectly dependent on power electronics, will introduce even more non-linear elements into the power system, making harmonic mitigation and power conditioning devices a necessity.…”

Section: Power Electronics and Harmonic Pollutionmentioning

confidence: 99%

“…Most shipboard power systems today are affected by harmonic pollution in some or another way [43]. Harmonic pollution, which impairs the power system's power quality, leads to higher fuel consumption and emission.…”

Section: Power Electronics and Harmonic Pollutionmentioning

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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“…electric propulsion or offshore drilling operations) is harmonic distortion (Hoevenaars et al, 2010). Since VFDs draw current in a nonlinear or sinusoidal manner, they can introduce excessive levels of both current and voltage harmonics.…”

Section: Safety and Environmentmentioning

confidence: 99%

Hydraulic vs. Electric: A Review of Actuation Systems in Offshore Drilling Equipment

Pawlus¹,

Choux²,

Hansen³

2016

MIC

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This article presents a survey on actuation systems encountered in offshore drilling applications. Specifically, it focuses on giving a comparison of hydraulic and electric drivetrains along with detailed explanations of their advantages and drawbacks. A significant number of industrial case studies is examined in addition to the collection of academic publications, in order to accurately describe the current market situation. Some key directions of research and development required to satisfy increasing demands on powertrains operating offshore are identified. The impact of the literature and application surveys is further strengthened by benchmarking two designs of a full-scale pipe handling machine. Apart from other benefits, the electrically actuated machine reduces the total power consumption by 70 % compared to its hydraulically driven counterpart. It is concluded that electric actuation systems, among other advantages, in general offer higher efficiency and flexibility, however, in some specific applications (such as energy accumulation or translational motion control) hydraulic powertrains are favorable.

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New marine harmonic standards

Cited by 40 publications

References 1 publication

Handling system harmonic propagation in a diesel-electric ship with an active filter

Handling system harmonic propagation in a diesel-electric ship with an active filter

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

Hydraulic vs. Electric: A Review of Actuation Systems in Offshore Drilling Equipment

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