Reliability assessment of linear generator type wave energy converters

Cretu, Alexandru; Munteanu, Radu; Iudean, Dan; Vlădăreanu, Victor; Karaisas, Petros

doi:10.1109/icate.2016.7754633

Cited by 4 publications

(3 citation statements)

References 6 publications

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“…For example, Ambühl (2015) has extensively reviewed two types of WECs, both of which are floating devices (in contrast to the submerged MegaRoller). Similarly, Cretu et al (2016), Mueller et al (2016) and Thies (2012) have all studied different types of WECs. These studies apply varying methods for failure identification (including e.g.…”

Section: Research On Reliability Aspects In Wecsmentioning

confidence: 99%

System Approach to Reliability Engineering - Case: Wave Energy Converter

Tiusanen¹,

Heikkilä²,

Räikkönen³

et al. 2020

Proceedings of the 30th European Safety and Reliability Conference and 15th Probabilistic Safety Assessment and Management Conf

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Wave power is a promising technology for producing renewable energy. Several types of wave energy converters (WECs) have recently been developed and introduced as technical solutions for capturing the energy of ocean waves. One of the WEC types is an Oscillating Wave Surge Converter (OWSC) that extracts energy from wave surges and the movement of water within them. Reliable operation and high system availability of WECs are key aspects to achieve the levelized cost of energy (LCOE) targets. Systematic reliability engineering methods can offer valuable support for the design and evaluation of highly automated multi-technical WEC systems. Analytical and simulation-based methods such as Failure Mode, Effects and Criticality Analysis (FMECA), Reliability Block Diagrams (RBDs) and Life Cycle Cost (LCC) calculations can be utilized in from early conceptual design phase. The system approach aims to guide the work to right system hierarchy level and to enable the use of available but partly uncertain information for system models, analyses and simulations. The research on reliability engineering methodology in VTT is related to concept development and system design of an OWSC and especially its power take of system (PTO) in an ongoing EU funded research project 'MegaRoller'. Our results confirm that reliabilityengineering efforts should be considered as an interconnected and iterative process, and the system approach helps to look at things at the appropriate level and accuracy.

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Section: Research On Reliability Aspects In Wecsmentioning

confidence: 99%

System Approach to Reliability Engineering - Case: Wave Energy Converter

Tiusanen¹,

Heikkilä²,

Räikkönen³

et al. 2020

Proceedings of the 30th European Safety and Reliability Conference and 15th Probabilistic Safety Assessment and Management Conf

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show abstract

“…Considering there is no definite and conclusive WEC design or hardly any commercially run wave farms supplying the grid, this technology's development is therefore vital and worth exploring further. More research has been published in recent years on WEC devices [1]- [19] power conversion [20]- [22] control strategies [23]- [27] economics, cost, reliability, and efficiency [3], [28]- [34] and grid-connected or off-grid [35]- [40].…”

Section: Introductionmentioning

confidence: 99%

A Review of Power Electronics for Nearshore Wave Energy Converter Applications

et al. 2022

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In compliance with the green energy policy, mitigation from high fossil fuel dependency is becoming a new objective for most countries, including Malaysia. Wave energy is among extensively explored renewable energy relatively clean, sustainable, and inexhaustible resources. To this day, neither definite wave energy technology nor widely available commercial wave farm supplying the grid has existed. Therefore, wave energy harvesting is the most compelling solution, especially in regions where the possibility of grid connection is low in the nearest future. Like other renewable energy, the voltage amplitude and frequency generated from waves are unstable and may vary continuously. This uncertainty has created energy transfer challenges since the grid requires a stable and uninterrupted energy supply. Therefore, power electronics devices are employed to modulate the controller circuits' pulse width. Further understanding of the relationship between wave energy conversion technology and its power conversion, particularly for nearshore applications, is summarized. This work also discussed selected wave energy conversion research and power conversion system implemented and studied in Malaysia. Finally, this review can provide extensive overview and broad understanding into power conversion system for Wave Energy Conversion, especially for nearshore applications.

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“…Reliability studies that also include considerations of the PTO system have been performed by Ambühl [11], Cretu et al [15], Mueller et al [16] and Thies [17]. All these studies have examined WEC concepts with very different operational principles, all of which are also different from the MegaRoller device.…”

Section: Introduction 1wave Energy and Reliabilitymentioning

confidence: 99%

Reliability Modelling and Analysis of the Power Take-Off System of an Oscillating Wave Surge Converter

Heikkilä¹,

Välisalo²,

Tiusanen³

et al. 2021

JMSE

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Wave power is a potential technology for generating sustainable renewable energy. Several types of wave energy converters (WECs) have been proposed for this purpose. WECs operate in a harsh maritime environment that sets strict limitations on how and when the device can be economically and safely reached for maintenance. Thus, to ensure profitable energy generation over the system life cycle, system reliability is a key aspect to be considered in WEC development. In this article, we describe a reliability analysis approach for WEC development, based on the use of reliability block diagram (RBD) modelling. We apply the approach in a case study involving a submerged oscillating wave surge converter device concept that utilizes hydraulics in its power take-off system. In addition to describing the modelling approach, we discuss the data sources that were used for gathering reliability data for the components used in a novel system concept with very limited historical or experimental data available. This includes considerations of the data quality from various sources. As a result, we present examples of applying the RBD modelling approach in the context of WEC development and discuss the applicability of the approach in supporting the development of new technologies.

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Reliability assessment of linear generator type wave energy converters

Cited by 4 publications

References 6 publications

System Approach to Reliability Engineering - Case: Wave Energy Converter

System Approach to Reliability Engineering - Case: Wave Energy Converter

A Review of Power Electronics for Nearshore Wave Energy Converter Applications

Reliability Modelling and Analysis of the Power Take-Off System of an Oscillating Wave Surge Converter

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