CAJ | 학술논문

变压器油是保障电力变压器安全运行的重要绝缘介质,在变压器实际运行过程中,变压器油所处运行环境复杂,多种外部因素影响其绝缘性能。为了解其相互关系,设计试验研究了不同电极结构下水分、油温、油中酸值及纤维量对变压器油50%冲击击穿电压以及板-板电极下U-t特性的影响并基于流注理论针对试验结果进行了探讨。试验发现,水分、油温、油中酸值及纤维量的升高均使得变压器油50%冲击击穿电压有所下降。水分、温度、酸值及纤维量对于U-t特性曲线有不同程度的影响,其影响与流注发展模式相关。
변압기유시보장전력변압기안전운행적중요절연개질,재변압기실제운행과정중,변압기유소처운행배경복잡,다충외부인소영향기절연성능。위료해기상호관계,설계시험연구료불동전겁결구하수분、유온、유중산치급섬유량대변압기유50%충격격천전압이급판-판전겁하U-t특성적영향병기우류주이론침대시험결과진행료탐토。시험발현,수분、유온、유중산치급섬유량적승고균사득변압기유50%충격격천전압유소하강。수분、온도、산치급섬유량대우U-t특성곡선유불동정도적영향,기영향여류주발전모식상관。
During the operation of transformer,the ambient environment of the transformer oil is complex.Multiple factors may affect the insulation property of the transformer oil.We experimentally studied the effects of moisture content,oil temperature,acid value and cellulose amount on the 50% impulse breakdown voltage of transformer oil under various electrode configurations,as well as on its voltage-time characteristics under plate-plate electrode.The experimental results demonstrate that the ascendance of moisture content,oil temperature,acid value and cellulose amount decreases the 50% impulse breakdown voltage.The moisture content,oil temperature,acid value and cellulose amount have different effects on the voltage-time characteristics,which are related with the streamer mode.