基于模糊层次分析法的干式变压器运行状态综合评估

Synthetic Evaluation for Dry-Type Transformers' Running Condition Based on FAHP

提出一种基于模糊层次分析法(FAHP)的干式变压器运行状态综合评估模型。通过选取16种基本因素建立评判指标体系,利用FAHP法确定各指标因素的常权值,同时依据均衡函数的变权理论,根据评判因素偏离正常值的水平,对各指标的固定常权进行修正,确定各评判指标的变权值。最后根据建立的多层模糊评判方法对干式变压器运行状态进行综合评估。实例分析表明:通过基于FAHP方法对干式变压器运行状态进行综合评估是有效和合理的,为干式变压器由计划检修向状态检修提供了有力的理论支撑。

The operation state assessment of dry-type transformers mainly depends on various parame- ters such as temperature, humidity, voltage and current acquired by on-line monitoring. This paper presents a synthetic evaluation model for dry-type transformers based on fuzzy analytic hierarchy process （FAHP）. First, 16 basic factors are selected to establish evaluation index system. The index constant weights are determined based on FAHP. Then, the index variable weights are evaluated by the balance function of the variable weight theory, by which the constant weights are modified accord- ing to the level that the factor deviates from the normal data. And then, a comprehensive assessment for operation situation of dry-type transformers is illustrated with the established multi-layer fuzzy eval- uation method. The practical application shows that synthetic evaluation for dry-type transformers＇ condition based on FAHP is valid and reasonable, which can give an effective theoretical support for the change from planned maintenance to condition-based maintenance.