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Hybrid Cascaded Modular Multilevel Converter With DC Fault Ride-Through Capability for the HVDC Transmission System.

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Title: Hybrid Cascaded Modular Multilevel Converter With DC Fault Ride-Through Capability for the HVDC Transmission System.
Authors: Li, Rui1, Adam, Grain Philip1, Holliday, Derrick1, Fletcher, John E.2, Williams, Barry W.1
Source: IEEE Transactions on Power Delivery. Aug2015, Vol. 30 Issue 4, p1853-1862. 10p.
Subjects: Electric power transmission faults, Fault tolerance (Engineering), Cascade converters, Ideal sources (Electric circuits), Electric potential, Electric capacity
Abstract: A new hybrid cascaded modular multilevel converter for the high-voltage dc transmission system is presented. The half-bridge cells are used on the main power stage and the cascade full-bridge (FB) cells are connected to its ac terminals. The main power stage generates the fundamental voltages with quite low switching frequency, resulting in relatively low losses. The cascaded FB cells only attenuate the harmonics generated by the main power stage, without contribution to the power transfer. Thus, the energy-storage requirement of the cascaded FB cells is low and the capacitance of FB cells is reduced significantly. Due to the dc fault reverse blocking capability of the cascaded FB cells, the proposed topology can ride-through the pole-to-pole dc fault. In addition, the soft restart is achieved after the fault is eliminated, without exposing the system to significant inrush current. Besides, the average-value model of the proposed topology is derived, based on which the control strategy is presented. The results show the feasibility of the proposed converter. [ABSTRACT FROM AUTHOR]
Copyright of IEEE Transactions on Power Delivery is the property of IEEE and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: <searchLink fieldCode="DE" term="%22Electric+power+transmission+faults%22">Electric power transmission faults</searchLink><br /><searchLink fieldCode="DE" term="%22Fault+tolerance+%28Engineering%29%22">Fault tolerance (Engineering)</searchLink><br /><searchLink fieldCode="DE" term="%22Cascade+converters%22">Cascade converters</searchLink><br /><searchLink fieldCode="DE" term="%22Ideal+sources+%28Electric+circuits%29%22">Ideal sources (Electric circuits)</searchLink><br /><searchLink fieldCode="DE" term="%22Electric+potential%22">Electric potential</searchLink><br /><searchLink fieldCode="DE" term="%22Electric+capacity%22">Electric capacity</searchLink>
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  Data: A new hybrid cascaded modular multilevel converter for the high-voltage dc transmission system is presented. The half-bridge cells are used on the main power stage and the cascade full-bridge (FB) cells are connected to its ac terminals. The main power stage generates the fundamental voltages with quite low switching frequency, resulting in relatively low losses. The cascaded FB cells only attenuate the harmonics generated by the main power stage, without contribution to the power transfer. Thus, the energy-storage requirement of the cascaded FB cells is low and the capacitance of FB cells is reduced significantly. Due to the dc fault reverse blocking capability of the cascaded FB cells, the proposed topology can ride-through the pole-to-pole dc fault. In addition, the soft restart is achieved after the fault is eliminated, without exposing the system to significant inrush current. Besides, the average-value model of the proposed topology is derived, based on which the control strategy is presented. The results show the feasibility of the proposed converter. [ABSTRACT FROM AUTHOR]
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  Label:
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  Data: <i>Copyright of IEEE Transactions on Power Delivery is the property of IEEE and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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      – Type: doi
        Value: 10.1109/TPWRD.2015.2389758
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      – Code: eng
        Text: English
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        PageCount: 10
        StartPage: 1853
    Subjects:
      – SubjectFull: Electric power transmission faults
        Type: general
      – SubjectFull: Fault tolerance (Engineering)
        Type: general
      – SubjectFull: Cascade converters
        Type: general
      – SubjectFull: Ideal sources (Electric circuits)
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      – SubjectFull: Electric potential
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      – SubjectFull: Electric capacity
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      – TitleFull: Hybrid Cascaded Modular Multilevel Converter With DC Fault Ride-Through Capability for the HVDC Transmission System.
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            NameFull: Li, Rui
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              Text: Aug2015
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