M. Stranges, S. Haq, Luis H. A. Teran, W. Veerkamp
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引用次数: 1
摘要
一种新型高压旋转电机的出厂验收试验包括对成品定子绕组绝缘系统的综合诊断试验。最终用户获得在机器使用寿命期间进行状态监测的基线数据。定子绕组的设计几何形状和制造工艺会影响介电测试结果。在比较来自不同定子的测试结果以获得用于验收测试数据库的统计有用样本方面存在重大挑战。本文比较了为美国两家化工厂建造的几种相同设计的1800rpm、26.1 MW (35000 hp)离心压缩机同步电动机定子的14.4 kv绕组的介电试验结果。结果与随附牺牲线圈的结果进行了比较。定子诊断测试包括耗散系数(DF,或tan delta)、功率因数上升(PFTU,或delta tan delta)、离线局部放电(PD)、用紫外分析仪进行电晕检测和在线PD。与每个定子一起生产和加工的牺牲线圈接受了指定的API线圈验收测试,以及用紫外分析仪进行电晕检查。在高电压下重复对样品线圈的PD测量,并将结果与电晕检查观察结果进行比较。本文将定子和线圈试验结果作为基准FAT数据的一个很好的例子进行了对比分析。
Dielectric testing and corona inspection of a 14.4-KV, 1800 RPM centrifugal compressor motor stator insulation system
Factory acceptance tests (FAT) of a new high voltage rotating machine include comprehensive diagnostic tests of the finished stator winding insulation system. The end user obtains baseline data for condition monitoring performed during the machine's operating life. The design geometry of stator windings and manufacturing processes used to produce them will affect the dielectric test results. There is a significant challenge in comparing test results from different stators to obtain a statistically useful sample for an acceptance test database. This paper compares dielectric test results from the 14.4-kV windings of several new 1800 rpm, 26.1 MW (35000 hp) centrifugal compressor synchronous motor stators of identical design, built for two US chemical plants. The results are compared to those from accompanying sacrificial coils. The stator diagnostic tests include dissipation factor (DF, or tan delta), power factor tip up (PFTU, or delta tan delta), offline partial discharge (PD), corona inspection with a UV analyzer, and online PD. Sacrificial coils produced and processed alongside each stator received the specified API coil acceptance tests, plus corona inspection with a UV analyzer. PD measurements on the sample coils were repeated at elevated voltage, and the results compared to the corona inspection observations. The paper shares the comparative analysis of the stator- and coil test results as an excellent example of baseline FAT data.