基于组合权重及改进可拓原理的电力变压器部件风险等级评估

The risk level evaluation of power transformer parts based on combination weighting and extension theory

电力变压器在全寿命周期质量管控过程中,通常会因为重点不明,导致不必要的人力物力的浪费。文章在统计分析的基础上,把电力变压器划分了七个部件,建立比较完善的风险等级评价体系。通过引入组合权重及改进可拓物元评估法,将风险等级评估与定量分析结合起来,减少了人为主观因素的影响,合理的解决了评估过程的不确定性及模糊性,同时改善了传统可拓理论依靠最大隶属度原则导致结果不准确的缺陷。所得结果,对全寿命周期电力变压器质量管控有一定的指导意义。

The process of power transformer quality control in whole life cycle will lead to unnecessary waste of resources, usually because the key is unknown. On the basis of statistical analysis, this paper divides the power transformer into seven parts and builds a comparatively perfect risk level evaluation system. Through the introduction of entropy and improved extension matter-element evaluation method, we integrate the risk level assessment with quantita- tive analysis to reduce the influence of subjective factors. It is a reasonable solution to the uncertainty and fuzziness of the evaluation process, meanwhile, it improves the traditional extension theory defects relying on the maximum mem- bership degree principle which lead to the result inaccurate. The component risk sorting has a certain guiding signifi- cance for the whole life cycle power transformer quality control.