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电网技术  2015 

基于改进拉普拉斯分值的开关柜故障特征选择和诊断方法

DOI: 10.13335/j.1000-3673.pst.2015.03.040, PP. 850-855

Keywords: 多端直流输电,两端直流输电技术,主回路,稳态参数,计算方法

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Abstract:

基于传感器信息,就地自主完成运行可靠性和控制可靠性评估是智能高压开关设备的核心技术之一。文章将评估分成2步首先评估单个传感器信息,然后在此基础上完成多传感器的综合评估。针对步骤一,讨论了“阈值法”、“趋势法”和“指纹法”,并为每个传感器信息选择其中一种合适的方法。在步骤二中,首先深入分析了传感器信息之间的独立性,提出3种可能的关联关系,并用于计算综合评估结果,其中,分析方法中那些与特定传感器值对应的可靠性用经验值代替,从而使分析方法变得可以执行。最后,给出了2个应用案例,案例的自评估结果与专家评估结果相一致,从而验证了所提自评估方法的有效性。

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