Hybrid Series Converter: A DC Fault-Tolerant HVDC Converter With Wide Operating Range

Patro, Siba Kumar; Shukla, Anshuman; Ghat, Mahendra B.

doi:10.1109/jestpe.2019.2955817

Cited by 24 publications

(5 citation statements)

References 35 publications

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“…However, the mentioned above generator converter systems with high-frequency transformer are not suitable for offshore DC station to convert large-scale windfarm energy. Besides, some fault tolerance strategies are broadly developed for MMC and DAB to make system operate safely in [25][26][27][28][29], for their submodular faults might make the whole system break down. In [25], A hybrid series converter topology is proposed for HVDC that contains of a parallel and a series chain link per phase, to gain wide operation range and DC fault-tolerant capability.…”

Section: Introductionmentioning

confidence: 99%

“…Besides, some fault tolerance strategies are broadly developed for MMC and DAB to make system operate safely in [25][26][27][28][29], for their submodular faults might make the whole system break down. In [25], A hybrid series converter topology is proposed for HVDC that contains of a parallel and a series chain link per phase, to gain wide operation range and DC fault-tolerant capability. In [26], parallel multiple submodule topology is proposed to make MMC have large current operation ability and filtering effect on high frequency harmonics.…”

Section: Introductionmentioning

confidence: 99%

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Study on Distributed Power-Collection and Cascaded Boosting-Voltage Topology and Strategy for Offshore DC Station

et al. 2023

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Different from traditional concentrated power-collection and boosting-voltage (CPCB) topology adopted by HVDC station, this paper adopts a distributed power-collection and cascaded boostingvoltage (DPCB) topology for offshore DC station to collect DC power and boost DC voltage, which consists of multiple cascaded single active bridges (SABs). It has merits of strong DC-voltage boosting ability, low design difficulty and cost, and low system error rate. Three aspects are studied as follows. First, DPCB topology with its circuit equations is deduced step by step, and its operational mechanism is analysed under phase-shifting control method further. Second, PI control strategy is designed based on system small signal model, and system performance is analyzed by Bode diagram. Third, fault tolerance strategy with predicted power ratio is designed to keep DPCB station from breakdown when some SABs and generators are out of order, and enormous power difference occurs due to the factors of wind turbine location and windward. Finally, the feasibility and effectiveness of designed DPCB station with its strategy are verified by experiment results.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Study on Distributed Power-Collection and Cascaded Boosting-Voltage Topology and Strategy for Offshore DC Station

et al. 2023

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“…However, the high-frequency transformer generator converter methods previously stated are not appropriate for offshore DC stations to convert huge amounts of windfarmelectricity. Additionally, certain fault tolerance solutions for MMC and DAB have been widely developed in [25], [26], [27], [28], and [29] to ensure system operation securely because their submodular defects could cause the entire system to fail. A hybrid series converter architecture with a parallel and a series chain link for each phase is suggested in [25] for HVDC in order to achieve a large operating range and DC fault-tolerant capability.…”

Section: Introductionmentioning

confidence: 99%

“…Additionally, certain fault tolerance solutions for MMC and DAB have been widely developed in [25], [26], [27], [28], and [29] to ensure system operation securely because their submodular defects could cause the entire system to fail. A hybrid series converter architecture with a parallel and a series chain link for each phase is suggested in [25] for HVDC in order to achieve a large operating range and DC fault-tolerant capability. A parallel multiple submodule structure is suggested in [26] to enable MMC to operate at high current densities and to filter out high frequency harmonics.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Offshore Dc Station With Distributed Power Collection and Cascaded Boosting-Voltage Topology: A Comprehensive Study

Kant¹

2023

IJSREM

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In order to collect DC power and boost DC voltage for offshore DC stations, the present research uses a distributed power- collection and cascaded boosting voltage (DPCB) topology made up of several cascaded single active bridges (SABs). In contrast, HVDC stations use the conventional concentrated power-collection and boosting voltage (CPCB) framework. It has high DC voltage boosting powers, is simple to build, is affordable, and offers a low system error rate. The next three variables are looked at. After first determining the DPCB topology with its circuit equations, the phase-shifting control approach is applied to further investigate the operational mechanism. The system minimal signal model is then used to construct a fuzzy control strategy. Third, a fault tolerance strategy with projected power ratio is developed to stop the DPCB station from failing if part of the SABs and generators fail. A significant power differential exists due to windward and wind turbine siting factors. The viability and efficacy of the designed DPCB station with its strategy are finally validated using simulation findings.INDEX TERMS: - SAB, fault tolerance, distributed power collecting, cascaded boosting voltage, and topology.

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“…Thus, a great amount of research has been and still is currently directed toward the investigation of new and more advantageous HVDC converter topologies. The modular multilevel converter (MMC) [7] currently represents the most accepted solution in new installations, in spite of the many variations that have been proposed [8][9][10][11] and the many more new topologies that have attempted to challenge it [12][13][14][15] (to cite only a few of them).…”

Section: Introductionmentioning

confidence: 99%

Rapid Evaluation Method for Modular Converter Topologies

et al. 2022

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The success of modular multilevel converters (MMCs) in high-voltage direct current (HVDC) applications has fueled the research on modular converter topologies. New modular converter topologies are often proposed, discussed, and sometimes applied in HVDC, as well as other industrial application such as STATCOMs, DC/DC HVDC, medium-voltage direct current (MVDC), etc. The performance evaluation of new modular converter topologies is a complex and time-consuming process that typically involves dynamic simulations and the design of a control system for the new converter topology. Sadly, many topologies do not progress to the implementation stage. This paper proposes a set of key performance indicators (KPIs) related to the cost and footprint of the converter and a procedure designed to rapidly evaluate these indicators for new converter topologies. The proposed methodology eliminates the need for dynamic simulations and control-system design, and is capable of identifying whether a particular converter is worth considering or not for further studies of a specific application, depending on the operating requirements. Thanks to the method outlined in this work and via the key parameters quantifying the “relevance” of the analyzed converters, promising topologies were easily identified, while the others could be rapidly discarded, resulting in saving valuable time in the study of the solutions that have a real potential. The proposed method is first described from a general point of view and then applied to a case study of the new converter topology—Open-Delta CLSC—and its application in two use cases.

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Hybrid Series Converter: A DC Fault-Tolerant HVDC Converter With Wide Operating Range

Cited by 24 publications

References 35 publications

Study on Distributed Power-Collection and Cascaded Boosting-Voltage Topology and Strategy for Offshore DC Station

Study on Distributed Power-Collection and Cascaded Boosting-Voltage Topology and Strategy for Offshore DC Station

Investigation of Offshore Dc Station With Distributed Power Collection and Cascaded Boosting-Voltage Topology: A Comprehensive Study

Rapid Evaluation Method for Modular Converter Topologies

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