Sizing of IPM Generator for a Single Point Absorber Type Wave Energy Converter

Tokat, Alexandra; Thiringer, Torbjörn

doi:10.1109/tec.2017.2741582

Cited by 19 publications

(5 citation statements)

References 20 publications

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“…Taking the inflation into account, the active material of this generator in this paper is estimated as 14,655.31 Euros/m 2 . Regarding the manufacturing cost, it is approximately assumed as half of the total cost of the generator [37]. So, the cost of PTO can be expressed as…”

Section: Economic Modeling For Cost Estimationmentioning

confidence: 99%

The Influence of Sizing of Wave Energy Converters on the Techno-Economic Performance

Tan¹,

Polinder²,

Laguna³

et al. 2021

JMSE

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Currently, the techno-economic performance of Wave Energy Converters (WECs) is not competitive with other renewable technologies. Size optimization could make a difference. However, the impact of sizing on the techno-economic performance of WECs still remains unclear, especially when sizing of the buoy and Power Take-Off (PTO) are considered collectively. In this paper, an optimization method for the buoy and PTO sizing is proposed for a generic heaving point absorber to reduce the Levelized Cost Of Energy (LCOE). Frequency domain modeling is used to calculate the power absorption of WECs with different buoy and PTO sizes. Force constraints are used to represent the effects of PTO sizing on the absorbed power, in which the passive and reactive control strategy are considered, respectively. A preliminary economic model is established to calculate the cost of WECs. The proposed method is implemented for three realistic sea sites, and the dependence of the optimal size of WECs on wave resources and control strategies is analyzed. The results show that PTO sizing has a limited effect on the buoy size determination, while it can reduce the LCOE by 24% to 31%. Besides, the higher mean wave power density of wave resources does not necessarily correspond to the larger optimal buoy or PTO sizes, but it contributes to the lower LCOE. In addition, the optimal PTO force limit converges at around 0.4 to 0.5 times the maximum required PTO force for the corresponding sea sites. Compared with other methods, this proposed method shows a better potential in sizing and reducing LCOE.

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Section: Economic Modeling For Cost Estimationmentioning

confidence: 99%

The Influence of Sizing of Wave Energy Converters on the Techno-Economic Performance

Tan¹,

Polinder²,

Laguna³

et al. 2021

JMSE

View full text Add to dashboard Cite

show abstract

“…where a factor 2 is considered to include the manufacture cost and converter cost; CFe, CCu and Cpm are unit price of iron, copper and permanent magnet, and they are assumed to be 3.3 euros/kg, 15.2 euros/kg and 24.7 euros/kg respectively [11]; MFe, MCu and Mpm are the mass of iron, copper and permanent magnet respectively. The grid connection cost is assumed to be 32% of the PTO cost [3].…”

Section: ( )mentioning

confidence: 99%

“…On the one hand, the PTO sizing implies the physical limits like force, power and stroke constraints which actually limit the maximum energy absorbed by WECs. On the other hand, for the linear PM generators, the PTO sizing also has an influence on their conversion efficiencies [11]. This last aspect has not yet been considered in our recent paper [3] where the PTO efficiency was assumed to be constant regardless of its size.…”

Section: Introductionmentioning

confidence: 99%

The Influence of Linear Permanent Magnet Generator Sizing on the Techno-Economic Performance of a Wave Energy Converter

Tan

Wang

Laguna

et al. 2021

2021 13th International Symposium on Linear Drives for Industry Applications (LDIA)

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Downsizing the Power Take-off (PTO) rating has been proven to be beneficial for decreasing the Levelized Cost of Energy (LCOE) of wave energy converters (WECs). However, the linear permanent magnet (PM) generator has not yet been modelled and optimized in detail in previous feasibility studies. This paper extends the study of the PTO downsizing to further investigate the influence of the linear PM generator sizing on a WEC's techno-economic performance. The generator is sized for providing different maximum forces, and the effect of sizing on the generator performance is presented. The efficiency map of the selected linear generator design is applied to evaluate the annual energy production (AEP) and finally identify its influence on the techno-economic performance of a WEC.

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“…In addition, PM machines have higher flux densities and lower losses compared to IGs and DFIG and are thus usually more power-dense. As well as, being brushless, they do not need external rotor supply via slip rings unlike DFIGs [21].…”

Section: Introductionmentioning

confidence: 99%

Decoupling control of a dual‐stator linear and rotary permanent magnet generator for offshore joint wind and wave energy conversion system

Zhang

Zhu

2020

IET Electric Power Applications

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Wind and wave energy are the main forms of offshore energy. In this study, a new joint wind and wave energy (JWWE) power conversion system, which simultaneously features wind power generation and wave power generation, is investigated. In the JWWE power generation system, a dual-stator linear and rotary permanent magnet generator (DSLRPMG) is employed to directly convert the wind and wave energy. The topology and operating principles of the power generation system are analysed, and the rectifier topology with two three-phase bridge converter is introduced for the JWWE power generation system. On the basis of the vector control method, the mathematical model of the DSLRPMG is deduced. The virtual flux direct power control method without any AC voltage sensors is applied for the power generation system. A new decoupling control method including flux decoupling and power decoupling is proposed and analysed. Meanwhile, an experimental setup is constructed, and the experiments are done. Both the simulation and experimental results show the validity and correctness of the control strategy.

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Sizing of IPM Generator for a Single Point Absorber Type Wave Energy Converter

Cited by 19 publications

References 20 publications

The Influence of Sizing of Wave Energy Converters on the Techno-Economic Performance

The Influence of Sizing of Wave Energy Converters on the Techno-Economic Performance

The Influence of Linear Permanent Magnet Generator Sizing on the Techno-Economic Performance of a Wave Energy Converter

Decoupling control of a dual‐stator linear and rotary permanent magnet generator for offshore joint wind and wave energy conversion system

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