Analysis of the Trend of Insulation Aging in Stator Winding of Off-Line and On-Line Steam Turbine Generator

被引：0

作者：

Koo J.-Y. ^{[1
]}

Kawk J.-H. ^{[1
]}

Kim H.-D. ^{[1
]}

机构：

[1] Motor Insulation Technology TFT, Hyosung Heavy Industries Corporation

来源：

Transactions of the Korean Institute of Electrical Engineers | 2024年 / 73卷 / 03期

关键词：

Diagnostic test; Dissipation factor; Insulation aging; Off-line; On-line; PD; S/T generator; Stator winding;

D O I：

10.5370/KIEE.2024.73.3.625

中图分类号：

学科分类号：

摘要：

In this paper, a steam turbine(S/T) generator(68.2MVA, 13.8kV) has been in service for more than 17 years. To assess the insulation aging condition of the stator winding of the S/T generator after prolonged operation, diagnostic tests were recently conducted both during off-line and on-line. The off-line diagnostic test primarily involves the measurement of alternating current, dissipation factor(tanδ), and partial discharge(PD). The insulation aging are anticipated through routine diagnostic tests conducted during off-line for seven years. In contrast, while the S/T generator is in operation, the analysis of insulation condition is focused solely on measuring PD for two years. This approach enhances the accuracy of determining the insulation condition, thereby improving the operational reliability. © 2024 Korean Institute of Electrical Engineers. All rights reserved.

引用

页码：625 / 630

页数：5

共 20 条

[1]

Kim Hee-Dong, Analysis of Insulation Aging Mechanism in Generator Stator Windings, J KIEEME, 15, 2, pp. 119-126, (2002)

[2]

Morin R., Bartnikas R., Menard P., A Three-Phase Multi-Stress Accelerated Electrical Aging Test Facility for Stator Bars, IEEE Trans. on Electrical Conversion, 15, 2, pp. 149-156, (2000)

[3]

Kim Hee-Dong, Characteristics of Insulation Diagnosis and Failure in Gas Turbine Generator Stator Windings, Journal of Electrical Engineering & Technology, 9, 1, pp. 280-285, (2014)

[4]

Yoshida H., Umemoto K., Insulation Diagnosis for Rotating Machine Insulation, IEEE Trans. on Electrical Insulation, EI-21, 6, pp. 1021-1025, (1986)

[5]

Stone G. C., Goodeve T. E., Sedding H. G., McDermid W., Unusual PD Pulse Phase Distributions in Operating Rotating Machines, IEEE Trans. on Dielectrics and Electrical Insulation, 2, 4, pp. 567-577, (1995)

[6]

McDermid W., Bromley J. C., Experience with Directional Couplers for Partial Discharge Measurements on Rotating Machines in Operation, IEEE Trans. on Energy Conversion, 14, 2, pp. 175-181, (1999)

[7]

Kim Hee-Dong, Assessment of Insulation Condition in Operating Large Turbine Generator, Trans of the KIEE, 53C, 6, pp. 324-326, (2004)

[8]

Technology for Preventive Maintenance of Turbine Generators, The Hitachi Hyoron, 72, pp. 35-42, (1990)

[9]

Lee Soo-Hoh, Kong Tae-Sik, Kim Hee-Dong, Analysis of Insulation Diagnosis Generator-Motor Stator Winding in Pumped Storage Power Plants, Journal of Electrical Engineering & Technology, 10, 3, pp. 1086-1092, (2020)

[10]

Kim Hee-Dong, Kong Tae-Sik, Ju Young-Ho, Kim Byong-Han, Analysis of Insulation Quality in Large Generator Stator Windings, Journal of Electrical Engineering & Technology, 6, 3, pp. 384-390, (2011)

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