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电网技术  2011 

基于马尔可夫状态空间图法的换流变系统可靠性评估

, PP. 71-78

Keywords: 高压直流,输电,换流变系统,可靠性评估,马尔可夫状态空间图

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Abstract:

换流变压器可靠性对整个高压直流(highvoltagedirectcurrent,HVDC)输电系统可靠性的影响非常大,因而有必要加强对换流变系统的可靠性评估。提出了单12脉波接线的换流变系统状态间转移率(故障率、修复率和安装率)的确定方法,采用等值元件组模型建立了不计和计及备用换流变时的换流变子系统的马尔可夫状态空间图。分析了换流变备用方案成本与单12脉波接线的换流变系统可靠性的关系,总成本最小的备用方案即为最优备用方案。算例结果验证了该方法的有效性,根据各方案可靠性评估结果可确定最优备用方案。

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