High frequency wind energy conversion system for offshore DC collection grid—Part I: Comparative loss evaluation

Agheb, E.; Holtsmark, Nathalie; Høidalen, Hans Kristian; Molinas, Marta

doi:10.1016/j.segan.2015.07.002

Cited by 5 publications

(6 citation statements)

References 22 publications

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“…It was shown that the concept could be better compared with radial AC systems for energy converters with high power ratings. The concept of a series DC collection grid with HF conversion was further investigated in [10,11], where the emphasis was on evaluating and improving the efficiency of three different AC/AC converters.…”

Section: Series DC Collection Gridsmentioning

confidence: 99%

“…In [9], a series DC collection grid comprising an AC/AC converter, a high-frequency (HF) transformer and a diode bridge rectifier was proposed. The topology was improved in [10,11] by comparing the losses and improving the efficiency by utilizing different power converters and increasing the operating frequency of the transformers. A review paper compared string, cluster and series DC collection topology with conventional AC for offshore wind [12].…”

Section: Introductionmentioning

confidence: 99%

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A Review of AC and DC Collection Grids for Offshore Renewable Energy with a Qualitative Evaluation for Marine Energy Resources

et al. 2022

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Marine energy resources could be crucial in meeting the increased demand for clean electricity. To enable the use of marine energy resources, developing efficient and durable offshore electrical systems is vital. Currently, there are no large-scale commercial projects with marine energy resources, and the question of how to design such electrical systems is still not settled. A natural starting point in investigating this is to draw on experiences and research from offshore wind power. This article reviews different collection grid topologies and key components for AC and DC grid structures. The review covers aspects such as the type of components, operation and estimated costs of commercially available components. A DC collection grid can be especially suitable for offshore marine energy resources, since the transmission losses are expected to be lower, and the electrical components could possibly be made smaller. Therefore, five DC collection grid topologies are proposed and qualitatively evaluated for marine energy resources using submerged and non-submerged marine energy converters. The properties, advantages and disadvantages of the proposed topologies are discussed, and it is concluded that a suitable electrical system for a marine energy farm will most surely be based on a site-specific techno-economic analysis.

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Section: Series DC Collection Gridsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Review of AC and DC Collection Grids for Offshore Renewable Energy with a Qualitative Evaluation for Marine Energy Resources

et al. 2022

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“…Te DC current that fows from the rectifer stage to the inverter stage of the three-phase SMC is denoted by i_dc, as shown in Figure 3. Equation (8) shows the connection matrix of the inverter stage of the indirect MC. Te necessary conditions for the power electronic switches in the inverter stage of the three-phase SMC are presented in equation (9).…”

Section: Smc Modelmentioning

confidence: 99%

“…Te simulation studies verify the usefulness of the sliding mode control method. In [8], the investigation of an ofshore WECS with a high frequency link that consists of a permanent magnet synchronous generator (PMSG), a converter, a high frequency transformer, and a diode bridge rectifer is carried out. Various MC and back-to-back converter topologies are studied to compare the efciency of each setup.…”

Section: Introductionmentioning

confidence: 99%

Fuzzy Fractional-Order PID Control for PMSG Based Wind Energy Conversion System with Sparse Matrix Converter Topology

Abdulrazaq

Vural

2022

International Transactions on Electrical Energy Systems

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Sparse matrix converter (SMC) is an indirect AC-to-AC power electronic converter that has a fictitious DC link between rectification and inversion stages in which neither a capacitor nor an inductor, as the storage element, is utilized. Due to this advantage, SMC is used in AC drives, marine thrust systems, aerospace industry, as well as in wind energy applications. On the other hand, permanent magnet synchronous generator (PMSG) is competitive in wind turbine applications due to their prominent features. In this work, a fuzzy fractional-order PID (FFOPID) controller is designed for a PMSG based wind energy conversion system (WECS) which employs a three-phase three-level SMC. The FFOPID controller is chosen to combine the salient features of the fractional-order calculus and fuzzy logic operations to enhance the dynamic response of classical PID controller with fixed gains. The simulation results taken under different case studies are analyzed in detail, which demonstrate the superiority of the designed FFOPID controller over classical PID control approach in tracking d- and q-axis current references of the SMC at the output. With the designed control approach, the smooth control of the real and reactive power injections into the grid from the WECS are ensured with acceptable transient response.

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“…The properties of this combination are well-known: the BTB-VSC is used to supply an unitary power factor at each AC side; the DC bus voltage is generally higher than the peak AC source voltage standard [28]. In fact, this type of configuration is the most used for WECS and MAECS [6,12,[18][19][20][21][22]. To achieve the objectives described above, control of the BTB-VSC is developed considering synchronous coordinates such as the rotating (dq0) [6,7,12,14,15,18,22,25,27,31] and stationary (αβ0) [17,23,29,31], as well as the time-domain or conventional (abc) [9,26,30], reference frame.…”

Section: Introductionmentioning

confidence: 99%

The Performance of the BTB-VSC for Active Power Balancing, Reactive Power Compensation and Current Harmonic Filtering in the Interconnected Systems

et al. 2020

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Nowadays, the use of power converters to control active and reactive power in AC–AC grid-connected systems has increased. With respect to indirect AC–AC converters, the tendency is to enable the back-to-back (BTB) voltage source converter (VSC) as an active power filter (APF) to compensate current harmonics. Most of the reported works use the BTB-VSC as an auxiliary topology that, combined with other topologies, is capable of active power regulation, reactive power compensation and current harmonic filtering. With the analysis presented in this work, the framework of the dynamics associated with the control loops is established and it is demonstrated that BTB-VSC can perform the three tasks for which, in the reviewed literature, at least two different topologies are reported. The proposed analysis works to support the performance criteria of the BTB-VSC when it executes the three control actions simultaneously and the total current harmonic distortion is reduced from 27.21% to 6.16% with the selected control strategy.

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High frequency wind energy conversion system for offshore DC collection grid—Part I: Comparative loss evaluation

Cited by 5 publications

References 22 publications

A Review of AC and DC Collection Grids for Offshore Renewable Energy with a Qualitative Evaluation for Marine Energy Resources

A Review of AC and DC Collection Grids for Offshore Renewable Energy with a Qualitative Evaluation for Marine Energy Resources

Fuzzy Fractional-Order PID Control for PMSG Based Wind Energy Conversion System with Sparse Matrix Converter Topology

The Performance of the BTB-VSC for Active Power Balancing, Reactive Power Compensation and Current Harmonic Filtering in the Interconnected Systems

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