高压电机介质损耗因数试验的电极结构、原理及与内屏蔽技术的关系分析  

Analysis on the Measuring Electrode Structure, Testing principle and Internal Corona Protection Dependent for Dielectric Dissipation Factor Test of HV Generator

作　　者：潘延明[1] 陈阳[1,2] 

机构地区：[1]哈尔滨电机厂有限责任公司,哈尔滨150040 [2]哈尔滨理工大学,工程电介质及其应用教育部重点实验室,哈尔滨150080

出　　处：《大电机技术》2017年第3期32-36,共5页Large Electric Machine and Hydraulic Turbine

摘　　要：本文结合实测数据对比分析四种测量电极结构:"低阻断开,测量电极仅包含槽部低阻长"、"测量电极仅包含槽部低阻长,两电极"、"测量电极包至高阻末端,三电极"以及"测量电极仅包含槽部低阻长,保护电极在低阻防晕层末端,电位跟踪";从试验原理角度阐述"西林电桥"、"电流比较仪"、"数字化测量原理设备"整机绕组介质损耗因数试验的差异;研究了介质损耗因数测量结果与导线内屏蔽技术的关系,得出结论:使用内屏蔽技术后介质损耗因数起始值略有增大,但增量显著降低。Testing methods for dissipation factor of large generator winding are focused in this paper. Testing data of four kinds of measuring electrode structures are compared and analyzed. Principles of Schering bridge, current comparator, and digital measurement are described. The influence of internal corona protection to the test result of dielectric dissipation factor is discussed, and it is found that the initial value is increased slightly, but the increment of dissipation factor decreased obviously.

关 键 词：高压电机 介质损耗因数 定子线棒 定子绕组 测量电极 内屏蔽 

分 类 号：TM355[电气工程—电机]