基于改进信息融合的配电变压器状态评估

为满足电力系统检修配电变压器的需要,提出了一种基于改进信息融合的配电变压器状态评估方法,以预防性试验和在线监测数据为基础,通过改进的层次分析法和模糊综合评估法获得评估指标的基本概率分布,利用修改后的证据源和修正后的合成规则对配电变压器状态进行评估。通过对某地区配电变压器实例分析,验证了该评估模型的有效性。该方法将预防性试验和在线监测数据相结合,有助于电力运营部门及时掌握分布广泛的配电变压器的运行状态,以便展开检修和维护。

State Assessment of Distribution Transformers Based on Improved Information Fusion

To meet the requirement of distribution transformer maintenance in power system, condition assessment method of distribution transformer was proposed based on improved information fusion. According to preventive tests and online monitoring data, basic probability distribution of evaluation indexes was obtained by improved analytic hierarchy process and fuzzy comprehensive evaluation method. The revised source of evidence and synthesis rules were used to evaluate the state of distribution transformer. The validity of the assessment model was verified by a case study of distribution transformer. The combination of preventive tests and online monitoring data will help the power department to grasp the operation state of widespread distribution transformers for the maintenance and repair.