基于改进理想点解法的电力变压器状态综合评估

Integrated Condition Assessment of Power Transformer Based on Improved TOPSIS

变压器作为电力系统的枢纽设备,其运行状态直接影响系统的安全运行水平。因此,准确判断变压器的运行状态具有重要意义。目前对变压器状态综合评估的研究多是对单台变压器给出了状态评价等级,没有实现对电力企业多台变压器状态的综合排序。对多属性决策理论的理想点解法进行了研究,改进了效益型指标和成本型指标的规范化公式及正负理想解的定义,使之适用于变压器状态综合评估与状态排序,提出了基于理想点解法的变压器状态综合评估模型,为电力企业从整体上掌握多台变压器的状态,从而为变压器的检修决策提供依据。实例分析表明,提出的方法是合理有效的。

As the key element in power system, the safe operating of transformer is close correlative with the safety of the power system. So it is important to determine accurately the operation status of running transformer. At present, mostly research of integrated condition assessment of transformer is only present the evaluation grade of a single transformer condition, and not achieve rank many transformers according to their condition. This paper studied of TOPSIS in multiple attribute decision making, improved normalization formulas of income-type index and cost-type index, gave the definition of positive ideal solution and negative ideal solution, making it suitable for Integrated condition assessment and ranking of power transformer. It also gave the integrated condition assessment model of power transformer based on TOPSIS, making power enterprise to grasp many transformer conditions as a whole and to decide to examine transformers. Analysis of real example illustrates that our method is rational and effective.