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المؤلفElserougi, A.A.
المؤلفAbdel-Khalik, A. S.
المؤلفMassoud, Ahmed
المؤلفAhmed, S.
تاريخ الإتاحة2022-03-23T07:01:04Z
تاريخ النشر2014
اسم المنشورIEEE Transactions on Power Delivery
المصدرScopus
المعرّفhttp://dx.doi.org/10.1109/TPWRD.2014.2325743
معرّف المصادر الموحدhttp://hdl.handle.net/10576/28813
الملخصTwo-level voltage-source converters and half-bridge modular multilevel converters are among the most popular types of HVDC converters. One of their serious drawbacks is their vulnerable nature to dc-side faults, since the freewheeling diodes act as a rectifier bridge and feed the dc faults. The severity of dc-side faults can be limited by connecting double thyristor switches across the semiconductor devices. By turning them on, the ac current contribution into the dc side is eliminated and the dc-link current will freely decay to zero. The main disadvantages of this method are: high dv/dt stresses across thyristors during normal conditions, and the absence of bypassing for the freewheeling diodes during dc faults since they are sharing the fault current with thyristors. This paper proposes combining and connecting the double thyristor switches across the ac output terminals of the HVDC converter. The proposed protection scheme provides advantages, such as lower dv/dt stresses and lower voltage rating of thyristor switches in addition to providing full segregation between the converter semiconductor devices and ac grid during dc-side faults. A simulation case study has been carried out to demonstrate the effectiveness of the proposed scheme.
راعي المشروعQatar National Research Fund
اللغةen
الناشرInstitute of Electrical and Electronics Engineers Inc.
الموضوعHVDC power transmission
Freewheeling diodes
HVDC converters
Modular multilevel converters
Normal condition
Protection schemes
Rectifier bridge
Thyristor switch
Voltage-source converter
Thyristors
العنوانA new protection scheme for HVDC converters against DC-side faults with current suppression capability
النوعArticle
الصفحات1569-1577
رقم العدد4
رقم المجلد29


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