CAJ | 학술논문

回复电压法作为无损、非破坏性的电气诊断方法，被广泛应用于电力变压器固体绝缘微水量诊断中，但甚少应用于绝缘油受潮状态的研究。基于回复电压特征量，利用扩展德拜模型等效电路建立仿真模型，提出初始斜率峰值时间这一新特征量，并利用该特征量获得诊断微水含量的判据。实例分析表明，初始斜率峰值时间不受变压器结构影响，能真实、准确地反映变压器绝缘系统受潮状态；同时该方法准确、有效，为评估变压器绝缘状态提供了新思路。
회복전압법작위무손、비파배성적전기진단방법，피엄범응용우전력변압기고체절연미수량진단중，단심소응용우절연유수조상태적연구。기우회복전압특정량，이용확전덕배모형등효전로건립방진모형，제출초시사솔봉치시간저일신특정량，병이용해특정량획득진단미수함량적판거。실례분석표명，초시사솔봉치시간불수변압기결구영향，능진실、준학지반영변압기절연계통수조상태；동시해방법준학、유효，위평고변압기절연상태제공료신사로。
Return voltage method (RVM)as a non-destructive electrical diagnostic method is widely used in micro water diagnosis of power transformers solid insulation,but it is rarely used in damp condition diagnosis of insulating oil.Firstly,based on the return voltage method,simu-lation model was built on the basis of the extended Debye model equivalent circuit model,and then a new characteristic quantity called peak time of initial slope was presented.Finally,the mi-cro-water assessment diagnosed criterion was proposed in this paper.The testing results show that peak time of initial slope isn't impacted by transformer structure,and it can accurately reflect the damp condition of transformer insulation systems.The proposed method provides a new idea to diagnose insulation condition of power transformers oil situation.