Series-DC connection of Offshore wind generating units - modeling, control and galvanic isolation.

Almeida, Andrei de Oliveira; Lopes, Israel Filipe; Tomim, Marcelo A.; Filho, João Alberto Passos; Barbosa, Pedro G.

doi:10.1016/j.epsr.2021.107149

Cited by 9 publications

(5 citation statements)

References 14 publications

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“…Series DC-connected HVDC system (Haibo et al, 2016), (Almeida et al, 2021) Current and voltage source converterbased series DC-linked HVDC networks have been proposed in the most recent studies for practical application in offshore wind power generation…”

Section: Configurationmentioning

confidence: 99%

Wind energy-harvesting technologies and recent research progresses in wind farm control models

et al. 2023

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In order to sustain the overall competitiveness of the wind power industry, unrelenting focus is required on working toward the advancement of enabling technologies and research studies that are associated with wind farm systems. First, wind farm technologies that include various turbine generator systems coupled with different power transmission configurations have enormous impact in determining the quality of wind power production. In addition, modern wind farms are expected to implement robust power control algorithms to meet more advanced requirements of electricity generation. Accordingly, this study explores the statuses of wind energy harvesting technologies and wind farm control strategies by discussing their recent and future impact on transforming the wind power industry. Doubly fed induction generator (DFIG)-based wind energy harvesting technology is well-matured and has exhibited an excellent track-record in past and recent experiences, but its capability of being further scalable for large-scale power production is limited as it is largely incompatible with high-voltage power transmission networks. On the other hand, permanent magnet synchronous generator (PMSG)-based technology is making significant advancements to attain the maximum possible efficiency level in greatly facilitating larger scale power generation, although the construction of bulky and costly power transmission systems is required. In this regard, future technological advances in the wind farm industry are expected to reasonably optimize the design and cost of high-voltage power transmission systems. Similarly, an increasing number of research studies are introducing a number of power optimization-based control models to create an ideal integration of the aforementioned wind farm technologies so as to ultimately enhance the reliability of electricity production by maintaining the systems’ safety. Yet, additional work is still expected to be undertaken in the future for a more extended evaluation of the performances of many different control models under a similar environment.

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Section: Configurationmentioning

confidence: 99%

Wind energy-harvesting technologies and recent research progresses in wind farm control models

et al. 2023

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“…2. In general, dimensions of the permanent magnet synchronous generator (PMSG) can vary with the overall SC-OWF setup, where both low and medium voltage variants would be applicable [11], [12], [21], [22]. The PMSG side ac/dc conversion stage employs IGBT switches, thereby being advantageous in terms of controllability and ripple propagation [9].…”

Section: A Wind Energy Conversion System (Wecs)mentioning

confidence: 99%

“…The active energy dissipation device, assumed to be a DR, is employed within dc bus protection stage, as per [23]. The galvanic isolation of the WECS is of significant importance and can be achieved by an air core MFT with the aim of reducing mass and losses [22]. The high transformation ratio of the proposed dc/dc conversion stage has been proposed in [24] and will be applied herein.…”

Section: A Wind Energy Conversion System (Wecs)mentioning

confidence: 99%

An Enhanced Series-Connected Offshore Wind Farm (SC-OWF) System Considering Fault Resiliency

Tait

Wang

Ahmed

2024

IEEE Trans. Power Delivery

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The series-connected offshore wind farm (SC-OWF) is a promising offshore wind generation solution to mitigate the need of centralized offshore high-voltage/power converter stations. Predominantly, researchers have focused on the steadystate operation and control of SC-OWFs, without considering the system-level characteristics and ability to ride-through dc side and ac network faults. This paper proposes an enhanced system for SC-OWF applications with fault-resilient capability, where comprehensive circuit configuration and protection strategies are articulated to minimize the negative effects caused by various types of dc and ac faults. For the offshore wind farm architecture, a grouping scheme is adopted where a substation based on disconnectors and diodes is proposed to realize prompt fault bypass/isolation and protection functions in the event of offshore system faults. Additionally, an onshore fault-tolerant modular multilevel converter (MMC) with modified dc-system-oriented control is employed to enable smooth and secure operation under steady-state and fault conditions. The proposed SC-OWF system is quantitatively substantiated by time-domain simulations where four ac/dc fault cases are considered, and the results consolidate the feasibility of the proposed configuration and control, indicating fault resilience of the SC-OWF system. Additionally, size, weight and cost estimations of the proposed offshore substation are presented and compared to a conventional MMC offshore station, to further highlight the merits of the proposed solution.

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“…Os parques eólicos podem ser localizados na terra (onshore) ou no mar (offshore). Se a distância para a rede principal for substancial, a conexão entre o parque e o continente torna-se mais interessante através de uma transmissão em corrente contínua de alta tensão (High Voltage Direct Current -HVDC) [2], [3], [4].…”

Section: Introductionunclassified

“…Apesar da tecnologia de transmissão CA já ter atingindo um alto grau de confiabilidade e eficácia, em determinadas aplicações, a transmissão em corrente contínua pode ser mais vantajosa do ponto de vista ambiental, técnico e econômico [3]. Além disso, as novas tecnologias de semicondutores vêm contribuindo com a viabilidade da transmissão HVDC, uma vez que esse tipo de transmissão é extremamente dependente dos conversores de potência utilizados.…”

Section: Introductionunclassified

Conversor CA-CC Isolado para Aplicações de Geração Eólica Offshore com Transmissão HVDC

Bezerra¹,

Praça²,

Júnior³

et al. 2022

Eletrônica de Potência

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Este artigo propõe um conversor CA-CC isolado usando a técnica de interleaving associada ao transformador de interfase. A partir do conversor base proposto é possível a obtenção de duas versões trifásicas: uma com lado secundário em paralelo ou outra com o lado secundário em série. Uma característica da topologia é a isolação galvânica na saída em média tensão CC (MVDC), esta configuração pode ser aplicada em sistemas de geração eólica (WECS) offshore com transmissão HVDC. Como alternativa para reduzir custos e aumentar a densidade de potência nos sistemas offshore, o uso de coletores CC em substituição aos sistemas CA existentes, mostra-se uma tendência nesse tipo configuração. A topologia proposta entraria como o WECS para a interconexão em MVDC das turbinas eólicas. Os resultados de simulação demonstram o correto funcionamento da topologia e sua capacidade de operar como um WECS. Os parâmetros adotados para a obtenção dos resultados baseiam-se em um modelo real de turbina eólica para uma potência de 3MVA.

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Series-DC connection of Offshore wind generating units - modeling, control and galvanic isolation.

Cited by 9 publications

References 14 publications

Wind energy-harvesting technologies and recent research progresses in wind farm control models

Wind energy-harvesting technologies and recent research progresses in wind farm control models

An Enhanced Series-Connected Offshore Wind Farm (SC-OWF) System Considering Fault Resiliency

Conversor CA-CC Isolado para Aplicações de Geração Eólica Offshore com Transmissão HVDC

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