基于模糊评判与DSmT的变压器本体多级绝缘状态评估方法  

Multi-level Insulation State Assessment Method of Transformer Proper Based on Fuzzy Judgment and DSmT

作　　者：夏彦卫 赵军 付浩川 和家慧 李哲[3] 高树国 XIA Yanwei;ZHAO Jun;FU Haochuan;HE Jiahui;LI Zhe;GAO Shuguo(State Grid Hebei Electric Power Research Institute,Shijiazhuang 050021,China;State Grid Jibei Electric Power Co.,Ltd.,Beijing EHV Power Transmission Company,Beijing 102488,China;Hebei Provincial Key Laboratory of Power Transmission Equipment Security Defense,North China Electric Power University,Hebei Baoding 071003,China)

机构地区：[1]国网河北省电力有限公司电力科学研究院,石家庄050021 [2]国网冀北电力有限公司超高压分公司,北京102488 [3]华北电力大学河北省输变电设备安全防御重点实验室,河北保定07100

出　　处：《高压电器》2022年第9期157-164,共8页High Voltage Apparatus

基　　金：国家电网有限公司总部科技项目资助(基于多元信息融合的大型电力变压器健康管理及故障预警)。

摘　　要：针对变压器本体绝缘状态评估中的状态信息指标的不确定性,文中提出了基于模糊评判理论与DSmT的变压器本体多级绝缘状态评估模型,该模型分为本体绝缘状态等级评估与绝缘缺陷风险等级评估。应用模糊评判理论构建等级评估的隶属度函数模型,选择反映变压器绝缘状态的绝缘类指标参量作为模型的输入,应用熵权法改进的DSmT对指标隶属度进行融合得到最终的等级评估结果,该模型有效克服了等级区间界限值过于绝对化的局限性,解决了传统DST高冲突性证据的融合问题。通过实例验证,该模型的评估结果具有一定的有效性,其不仅能够反映变压器本体的绝缘状态等级,还可以反映其具体绝缘缺陷的风险趋势。In view of the uncertainty of state information index in insulation condition assessment of transformer prop-er,a multi-level insulation state assessment model of transformer proper based on fuzzy judgement theory and DSmT is proposed in this paper.The model is divided into insulation condition level assessment of the proper and insulation defect risk level assessment.The fuzzy judgement theory is applied to construct the membership function model of lev-el assessment,and the insulation index parameter reflecting insulation condition of transformer is selected as the input of the model.The DSmT which is improved on the basis of entropy weight method is used to fuse the membership de-gree of the index to get the final level assessment result.The model can effectively overcome the limitation that the bounds value of grade interval is too absolute and solve the problem of high conflict evidence fusion in traditional DST.It is verified by the example that the assessment result of the model has effectiveness,which can not only reflect the insulation condition level of the transformer proper,but also reflect the risk trend of its specific insulation defects.

关 键 词：变压器本体 绝缘状态等级评估 缺陷风险等级评估 模糊评判理论 DSMT 

分 类 号：TM855[电气工程—高电压与绝缘技术]