A controllable thyristor-based commutation failure inhibitor for LCC-HVDC transmission systems

Mirsaeidi, Sohrab and Tzelepis, Dimitrios and He, Jinghan and Dong, Xinzhou and Mat Said, Dalila and Booth, Campbell (2021) A controllable thyristor-based commutation failure inhibitor for LCC-HVDC transmission systems. IEEE Transactions on Power Electronics, 36 (4). pp. 3781-3792. ISSN 0885-8993 (https://doi.org/10.1109/TPEL.2020.3021284)

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Abstract

Commutation failure is a serious malfunction in line-commutated high voltage direct current (HVdc) converters which is mainly caused by the inverter ac faults, and results in a temporary interruption of transmitted power and damage to the converter equipment. In this article, a controllable commutation failure inhibitor (CCFI) is developed which obviates the main drawbacks of the existing power electronic based and fault current limiting based strategies. Under normal circumstances, the developed CCFI improves the steady-state stability and the power transfer capability of the inverter ac lines, while it does not cause excessive voltage stress on the converter valves. In addition, it would reduce the risk of commutation failure occurrence, since it does not lead to any voltage drop in the commutation circuit. When a fault occurs at one of the inverter ac systems, its corresponding CCFI limits the fault current depending on the reduced extinction angle. This would not only inhibit the successive commutation failures on the HVdc converter, but also extend the lifetime of components in the inverter ac systems. The practical feasibility of the developed CCFI is assessed through laboratory testing, using a real-Time Opal-RT hardware prototyping platform. The obtained results indicate that the developed CCFI can reliably inhibit the commutation failures during various types of faults.

  • Item type:Article
    ID code:73891
    Dates:
    Date
    Event
    30 April 2021
    Published
    2 September 2020
    Published Online
    27 August 2020
    Accepted
    Notes:© 2020 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting /republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
    Subjects:Technology > Electrical engineering. Electronics Nuclear engineering
    Department:Faculty of Engineering > Electronic and Electrical Engineering
    Depositing user: Pure Administrator
    Date deposited:17 Sep 2020 09:44
    Last modified:09 Apr 2024 01:48
    URI:https://strathprints.strath.ac.uk/id/eprint/73891
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