柔性直流输电可靠性评估中参数灵敏度分析  

The parameter sensitivity analysis of reliability evaluation in a flexible HVDC system

作　　者：毕锐[1] 丁明[1] 李小燕[1] 

机构地区：[1]合肥工业大学电气与自动化工程学院,安徽合肥230009

出　　处：《中国电力》2008年第11期20-24,共5页Electric Power

基　　金：国家电网公司科技项目(SGKJ[2007]106)

摘　　要：通过对柔性直流输电系统中元件灵敏度的分析,为原始数据采集、增强性措施确定等问题提供参考和建议。根据Markov过程的基本原理和累积状态间转移频率的性质,建立柔性直流输电系统的数学模型。采用定量的分析方法,就系统的主电路拓扑结构以及重要元件进行灵敏度分析。得出的结论是,在当前情况下,采用两电平结构、提高阀臂的可靠性水平以及采取相应的增强性措施,对系统的可靠性指标的改善有比较明显的作用。The quality of the original parameters is related to the credibility level of reliability evaluation in a flexible HVDC system, so the parameter sensitivity analysis can provide effective advice about collecting the reliability data and also is important for people to determine enhanced measures and solve the reliability optimization. This paper presented the reliability evaluation model of a flexible HVDC system based on the basic principle of Markov processes and the properties of transitional frequencies among cumulative states. Then the sensitivity of the main circuit configuration and important elements of the flexible HVDC system was analyzed. The result shows that adopting 2-level main circuit configuration, increasing the reliability of valve and taking enhanced measures can have an obvious effect on the amending of system reliability indices.

关 键 词：柔性直流输电 灵敏度 可靠性 

分 类 号：TM721.1[电气工程—电力系统及自动化]