Fault Characteristic Analysis and Countermeasure Research for Novel CLCC DC System

IF 4.5 2区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Transactions on Industry Applications Pub Date : 2025-06-13 DOI:10.1109/TIA.2025.3579468

Wenyi Xu;Jianjun Ma;Dezhen Zhang;Zhe Chen;Miao Zhu

引用次数: 0

Abstract

With the development of high-voltage direct current (HVDC) transmission, commutation failures (CFs) in line commutated converters (LCC) become increasingly prominent. A controllable line commutated converter (CLCC) is proposed to effectively solve commutation failures in LCC. Forced commutation is achieved in CLCC by incorporating auxiliary branches. However, the added components introduce the risks such as open-circuit or short-circuit failures, impacting the reliability of converter. This paper analyzes the fault characteristics of key components in both the main and auxiliary branches of the CLCC, with focus on open-circuit and short-circuit faults. A fault location method based on fault voltage and current is then proposed. Finally, the fault characteristic analysis and the proposed location method are validated by simulation on the developed 500kV/1.2kA CLCC-HVDC model in PSCAD/EMTDC. The result shows that the proposed method enables accurate identification of the faulty valve location.

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新型CLCC直流系统故障特征分析及对策研究

随着高压直流（HVDC）输电技术的发展，线路整流变换器（LCC）的整流故障日益突出。为了有效地解决线路换向故障，提出了一种可控线路换向变换器（CLCC）。在CLCC中，通过合并辅助分支实现强制换相。然而，增加的元件带来了开路或短路故障等风险，影响了变换器的可靠性。本文分析了CLCC主支路和辅助支路关键部件的故障特征，重点分析了开路和短路故障。然后提出了一种基于故障电压和电流的故障定位方法。最后，在PSCAD/EMTDC中建立的500kV/1.2kA CLCC-HVDC模型上，通过仿真验证了故障特征分析和所提出的定位方法。结果表明，该方法能够准确地识别出故障阀门的位置。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IEEE Transactions on Industry Applications 工程技术-工程：电子与电气

CiteScore

9.90

自引率

9.10%

发文量

747

审稿时长

3.3 months

期刊介绍： The scope of the IEEE Transactions on Industry Applications includes all scope items of the IEEE Industry Applications Society, that is, the advancement of the theory and practice of electrical and electronic engineering in the development, design, manufacture, and application of electrical systems, apparatus, devices, and controls to the processes and equipment of industry and commerce; the promotion of safe, reliable, and economic installations; industry leadership in energy conservation and environmental, health, and safety issues; the creation of voluntary engineering standards and recommended practices; and the professional development of its membership.