CAJ | 학술논문

针对变压器状态在线评估问题，结合变压器监测数据的阈值性、极偏性等特点，构建在线监测指标体系，并通过指数法将各指标阈值进行归一化处理。在此基础上，结合熵权法与变权法，提出一种基于模糊物元的变压器状态实时评估模型。在该模型中，首先，利用熵权法对层次分析法求出的初始权重进行了修正，减少了权重的主观性；其次，根据观测数据偏离指标正常值的水平动态变权；最后，分别用层次分析法得到的权重、熵权法修正后的权重和变权后的权重进行模糊物元评估，并对评估结果进行比较。经过实例分析证明，改进的方法对于局部指标严重偏离的情况评估更准确，适合对变压器状态进行评估。
침대변압기상태재선평고문제，결합변압기감측수거적역치성、겁편성등특점，구건재선감측지표체계，병통과지수법장각지표역치진행귀일화처리。재차기출상，결합적권법여변권법，제출일충기우모호물원적변압기상태실시평고모형。재해모형중，수선，이용적권법대층차분석법구출적초시권중진행료수정，감소료권중적주관성；기차，근거관측수거편리지표정상치적수평동태변권；최후，분별용층차분석법득도적권중、적권법수정후적권중화변권후적권중진행모호물원평고，병대평고결과진행비교。경과실례분석증명，개진적방법대우국부지표엄중편리적정황평고경준학，괄합대변압기상태진행평고。
For online evaluation of transformer state,online monitoring index system is established in accordance with thresh-old characteristics and polarity bias and all index thresholds are normalized by index method.On this basis,this paper pres-ents a real-time evaluation on transformer state based on variable weight fuzzy matter-element model in combination with entropy weight method and variable weight method.In the model,the entropy weight method is adopted to modify the ini-tial weight concluded by analytic hierarchy process to make the weight less subjective;then by observing horizontal dynamic variable weight normal index is departed,ultimately,fuzzy matter-element is evaluated respectively by weight from analytic hierarchy process,modified by entropy weight method and after variable weight.The evaluation results are compared.It is proved by practical analysis that the improve method is more accurate in evaluation of seriously deviated local index and can be applicable to transformer state evaluation.