The influence of commutation failures on the reliability of HVDC transmission systems

TENCON 2015 - 2015 IEEE Region 10 Conference Pub Date : 2015-11-01 DOI:10.1109/TENCON.2015.7372871

Haipeng Xie, Z. Bie, Pengfei Dong, Chao Zheng

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引用次数: 6

Abstract

The commutation failure is a common fault in line-commutated converter (LCC) based high-voltage direct current (HVDC) transmission system. The commutation failure is modeled and its influence on reliability of HVDC transmission systems is studied in this paper. First, the commutation failure mechanism of LCC-HVDC transmission systems is analyzed. Then, the commutation failure criterion is presented based on the concept of commutation area. Moreover, a concise equivalent reliability model of the commutation failure is built. The corresponding evaluation method is proposed based on Monte Carlo simulation. Furthermore, the impacts of commutation failures on reliability are studied by introducing the reliability model into the F&D approach in HVDC reliability evaluation. Extensive studies are conducted on a CIGRE benchmark system, which validate the presented methods. The evaluation results show that the commutation failures influence the reliability of HVDC system obviously. After the consideration of commutation failures, the energy unavailability of the HVDC transmission system increases more than 9%.

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换相故障对直流输电系统可靠性的影响

换向故障是基于线路换向变换器的高压直流输电系统中常见的故障。建立了直流输电系统换相失效的模型，研究了换相失效对系统可靠性的影响。首先，分析了LCC-HVDC输电系统换相失效机理。然后，基于换相面积的概念，提出了换相失效判据。在此基础上，建立了换相失效的简明等效可靠性模型。提出了基于蒙特卡罗仿真的评价方法。在此基础上，将可靠性模型引入高压直流可靠性评估的F&D方法中，研究了换相故障对可靠性的影响。在CIGRE基准系统上进行了广泛的研究，验证了所提出的方法。评估结果表明，换相故障对高压直流系统的可靠性影响较大。考虑换相故障后，直流输电系统的能量不可用性增加了9%以上。

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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TENCON 2015 - 2015 IEEE Region 10 Conference

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