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| 摘要: |
| 传统的高压直流输电系统可靠性评估模型忽略了共因失效和负荷多样性的问题而过于乐观。应用载荷-性能干涉分析方法对高压直流换流器的失效模式和机理进行了分析说明,并根据晶闸管元件的耐受性能对换流阀的运行载荷进行分类,进而建立了一种能计及不同载荷条件的新颖的多载荷模型。为了验证所提模型的有效性,在一12脉波高压换流器上进行了对比算例,同时引入了关键重要度指标对不同载荷在换流器失效模式中的重要性和灵敏度进行了评价。结果表明,所提模型较之传统模型更为精确和可靠。 |
| 关键词: 可靠性,载荷-性能干涉分析,多载荷模型,共因失效,负荷多样性 |
| DOI： |
| 分类号:TM721.1 TB114.3 |
| 基金项目:国家自然科学基金重点项目(50337010)~~ |
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| Multi-load model for reliability assessment of HVDC converter |
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CHEN Bi-yun REN Zhen
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| Abstract: |
| Because of ignoring common cause failures and load diversity,the conventional reliability assessment models for HVDC transmission systems are over-optimistic. Load-property interference analysis method is introduced to provide a valuable understanding of failure modes and mechanism of HVDC converter. Operating loads of HVDC converters are classified according to endurance performances of thyristor element and a multi-load model taking different loading conditions into account is established. Comparative calculations are performed on a 12-impulse HVDC converter to illustrate the effectiveness of the proposed model. Importance and sensitivity of different loads in influencing converter failure probability are also evaluated by critical importance index. Results show that the proposed model is more precise and reliable. |
| Key words: reliability,load-property interference analysis,multi-load model,common cause fai-lure,load diversity |
