【摘要】 针对电力变压器状态评估问题,提出了一种在没有标准故障模型的情况下变压器状态识别的新方法。该方法将灰靶理论引入变压器状态评估中,结合油中溶解气体分析技术,给出了变压器状态评估的算法步骤。同时对现有算法加以改进,用灰贡献度分析方法确定的油中溶解气体的加权系数代替均权。实验表明:该方法解决了在没有标准故障模型的情况下变压器状态识别的问题,为变压器状态评估提供了一种有效的新途径。更多还原

【Abstract】 State assessment provides the bases for power transformer maintenance.A new method to recognize the state of power transformer without the standard fault model is proposed.This method introduces the grey target theory into the state assessment of power transformer by regarding the fault system as a typical grey system.In combination with the technique of Dissolved Gases Analyses(DSA),the steps of the arithmetic for state assessment are given.In this arithmetic the equal weights of dissolved gases used in existing arithmetic are replaced by the variable weights,which are more approximate to the real state of power transformer in practice.The variable weights of dissolved gases are determined by the analysis method of grey contribution degree.Experiment results show that this method can be used to recognize the state of power transformer in the absence of standard fault model.更多还原