摘要
为探究环境湿度对发电机主绝缘介电特性的影响,同时消除温度对介电谱测试的影响,本文制备不同老化状态绝缘试样,进行受潮试验和变温介电谱测试。研究结果表明:介损积分谱对绝缘受潮状态十分敏感,可以稳定表征绝缘受潮状态;引入频温平移因子,构造不同老化状态试样的介质损耗频域谱主曲线,消除温度对测试的影响,同时验证了频温平移理论在不同老化状态下的普适性;通过计算活化能证实主曲线的可靠性。
In order to investigate the influence of ambient humidity on the dielectric characteristics of the main insulation of the generator,and eliminate the influence of temperature on the dielectric spectrum test,insulation samples with different aging states were prepared in this paper,and subjected to moisture test and temperature-varying dielectric spectrum test.The research results show that the dielectric loss integral spectrum is very sensitive to the damp state of insulation,and can stably characterize the damp state of insulation.Introducing the frequency temperature shift factor and constructing the main curve can eliminate the influence of temperature on the test.At the same time,the universality of the theory of frequency temperature translation in different aging states is verified,confirming the reliability of the master curve by calculating the sample activation energy.
作者
孙福春
王安东
王继豪
韩英喆
刘骥
SUN Fu-chun;WANG An-dong;WANG Ji-hao;HAN Ying-zhe;LIU Ji(Electric Power Research Institute,State Grid Shandong Electric Power Company,Jinan 250002,China;Key Laboratory of Engineering Dielectrics and Its Application Ministry Education, Harbin University of Science and Technology,Harbin 150080,China)
出处
《哈尔滨理工大学学报》
CAS
北大核心
2021年第3期13-18,共6页
Journal of Harbin University of Science and Technology
基金
国网山东省电力公司科技项目(52062617002S).
关键词
频域介电谱
特征参量
介电损耗因数积分谱
环氧云母复合绝缘
定子线棒
frequency domain dielectric spectrum
characteristic parameters
dielectric loss factor integral spectrum
epoxy mica composite insulation
stator bar
