FTA Analysis of the Winding in Steam Power Plant: An Insight into the Stator

Ade Suhendar¹ , Yanuar Z. Arief² , Sinka Wilyanti³ , Rosyid R. Al-Hakim⁴ , Roma San Rego⁵

1. Electrical Engineering Dept., Jakarta Global University (JGU), Depok, Indonesia.
2. Electrical Engineering Dept., Jakarta Global University (JGU), Depok, Indonesia.
3. Electrical Engineering Dept., Jakarta Global University (JGU), Depok, Indonesia.
4. Electrical Engineering Dept., Jakarta Global University (JGU), Depok, Indonesia.
5. Electrical Engineering Dept., Jakarta Global University (JGU), Depok, Indonesia.

Section:Research Paper, Product Type: Journal-Paper
Vol.10 , Issue.1 , pp.7-13, Mar-2023

Online published on Mar 31, 2023

Copyright © Ade Suhendar, Yanuar Z. Arief, Sinka Wilyanti, Rosyid R. Al-Hakim, Roma San Rego . This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
 

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Abstract :
The stator winding generator is a significant equipment in the steam power plant (SPP), which converts mechanical energy into electricity. The windings of the turbine generator were mainly used for power generation, and the failure of the winding caused much damage to the stator. In this paper, fault tree analysis (FTA) was used to determine the initial condition of deterioration of the winding fault. FTA results are preliminary indications of stator fault. The investigation results found the binding tape aging and seal oil generator issues. At some point, the binding tape coils in several slots on the exciter and turbine sides were found as loose binding tape (coil binder) that is not tight (loose) and can be interpreted as aging conditions. The earth stator alarm was also confirmed.

Key-Words / Index Term :
Alarm Earth Stator Fault, Electric Steam Power Plant, Fault Tree Analysis, Generator Failure

References :
[1] S. N. Wahyudin, R. A. Diantari, and T. M. Rahmatullah, “Analisa Proteksi Differensial pada Generator di PLTU Suralaya,” Energi & Kelistrikan, vol. 9, no. 1, pp. 84–92, 2017. http://dx.doi.org/10.33322/ENERGI.V9I1.51
[2] D. F. Pamungkas, “Laporan Kerja Praktek PT. PJB UBJOM PLTU Rembang Sistem Eksitasi pada Generator PLTU 1 Jawa Tengah Rembang,” Semarang (ID), 2015.
[3] A. Kutsyk, M. Semeniuk, M. Korkosz, and G. Podskarbi, “Diagnosis of the Static Excitation Systems of Synchronous Generators with the Use of Hardware-In-the-Loop Technologies,” Energies, vol. 14, no. 21, p. 6937, 2021. http://dx.doi.org/10.3390/EN14216937
[4] PJB Integrated Manamegent System PT. Pembangkitan Jawa Bali Unit Bisnis Jasa O&M PLTU Rembang, “RCFA Gangguan Generator Stator Unit 20 No. RCFA: 03/RCFA/SOT/UJRB/2021,” Rembang (ID), 2021.
[5] J. K. Mohanty, M. Sihna, A. Adarsh, N. Prabhakaran, P. R. Dash, and P. K. Pradhan, “Enhancement of Turbine Performance Using Root Cause Failure Analysis and LPDE Correction,” J. Fail. Anal. Prev., vol. 20, pp. 1704–1710, 2020. http://dx.doi.org/10.1007/S11668-020-00977-9/METRICS
[6] D. Cahyadi and Hermawan, “Analisa Perhitungan Efisiensi Turbine Generator QFSN-300-2-20B Unit 10 dan 20 PT. PJB UBJOM PLTU Rembang,” Lap. Kerja Prakt. Jur. Tek. Elektro Univ. Diponegoro, vol. 2015, pp. 1–8, 2015.
[7] J. Purnomo and M. Effendy, “Analisa Pengaruh Load Capacity Pembangkit Listrik Tenaga Uap Tanjung Awar-Awar 350 MW Terhadap Efisiensi Turbin Generator QFSN-350-2 Unit 1,” J. Pendidik. Tek. Mesin, vol. 7, no. 3, 2018.
[8] J. Permana and I. Kurniawan, “Analisis Perhitungan Daya Turbin yang Dihasilkan dan Efisiensi Turbin Uap pada Unit 1 dan Unit 2 di PT. Indonesia Power UBOH UJP Banten 3 Lontar,” Mot. Bakar J. Tek. Mesin, vol. 1, no. 2, 2017. http://dx.doi.org/10.31000/MBJTM.V1I2.731
[9] S. S. Dirmanto and A. R. Effendi, “Analisis Perubahan Tekanan Vakum Kondensor Terhadap Kerja Turbin dan Produksi Listrik PLTU Unit 1 Sebalang Menggunakan Simulasi Cycle Tempo,” J. Powerpl., vol. 8, no. 1, pp. 1–29, 2020. http://dx.doi.org/10.33322/POWERPLANT.V8I1.1047
[10] U. Usman, A. Multazam, and A. Gaffar, “Perbandingan Efisiensi Aktual Dan Spesifikasi Generator BTG II Power Plant PT. Semen Tonasa 2×35 MW Pada Berbagai Beban Aktual,” J. ELTIKOM J. Tek. Elektro, Teknol. Inf. dan Komput., vol. 6, no. 2, pp. 163–173, 2022. http://dx.doi.org/10.31961/ELTIKOM.V6I2.554
[11] A. G. Romdhon, M. Ilham, R. P. Astutik, and D. Irawan, “Penanganan Lonjakan Vibrasi pada Rotor Elektrik Turbin di PLTU Gresik,” J. Appl. Smart Electr. Netw. Syst., vol. 1, no. 02, pp. 47–54, 2020. http://dx.doi.org/10.52158/JASENS.V1I02.116
[12] A. Raymond, C. Millet, and H. Provencher, “Analysis of a hydro-generator stator winding failure,” in 2021 IEEE Electrical Insulation Conference (EIC), 2021, pp. 389–392. http://dx.doi.org/10.1109/EIC49891.2021.9612386
[13] G. C. Stone, E. A. Boulter, I. Culbert, and H. Dhirani, Electrical insulation for rotating machines: design, evaluation, aging, testing, and repair, 21st ed. New Jersey (US): John Wiley & Sons, Inc., 2004.
[14] G. C. Stone and V. Warren, “Objective methods to interpret partial-discharge data on rotating-machine stator windings,” IEEE Trans. Ind. Appl., vol. 42, no. 1, pp. 195–200, 2006. http://dx.doi.org/10.1109/TIA.2005.861273
[15] G. Stone and J. Kapler, “Stator winding monitoring,” IEEE Ind. Appl. Mag., vol. 4, no. 5, pp. 15–20, 1998. http://dx.doi.org/10.1109/2943.715501
[16] S. R. Campbell and G. C. Stone, “Investigations into the use of temperature detectors as stator winding partial discharge detectors,” in Conference Record of the 2006 IEEE International Symposium on Electrical Insulation, 2006, vol. 2007, pp. 369–375. http://dx.doi.org/10.1109/ELINSL.2006.1665335
[17] G. C. Stone, I. Culbert, E. A. Boulter, and H. Dhirani, “Rotating Machine Insulation Systems,” in Electrical Insulation for Rotating Machines: Design, Evaluation, Aging, Testing, and Repair, John Wiley & Sons, Inc., 2014, pp. 1–46. http://dx.doi.org/10.1002/9781118886663.CH1
[18] R. E. Fenton, B. E. B. Gott, and C. V. Maughan, “Preventative maintenance of turbine-generator stator windings,” IEEE Trans. Energy Convers., vol. 7, no. 1, pp. 216–222, 1992. http://dx.doi.org/10.1109/60.124563
[19] A. Gegenava, A. Khazanov, and B. Moore, “Evaluation of electrical insulation quality for high voltage stator windings machines through visual inspection of dissected coils,” in 2016 IEEE Electrical Insulation Conference (EIC), Aug. 2016, pp. 156–161. http://dx.doi.org/10.1109/EIC.2016.7548656
[20] V. I. J. Kokko, “Ageing due to thermal cycling by power regulation cycles in lifetime estimation of hydroelectric generator stator windings,” in 2012 XXth International Conference on Electrical Machines, 2012, pp. 1559–1564. http://dx.doi.org/10.1109/ICELMACH.2012.6350086
[21] X. Bao, T. Wang, and Y. Liu, “Electromagnetic force analysis of turbogenerator stator end winding,” in 2020 5th International Conference on Electromechanical Control Technology and Transportation (ICECTT), May 2020, pp. 111–115. http://dx.doi.org/10.1109/ICECTT50890.2020.00032
[22] B. Yue, X. Chen, Y. Cheng, J. Song, and H. Xie, “Diagnosis of stator winding insulation of large generator based on partial discharge measurement,” IEEE Trans. Energy Convers., vol. 21, no. 2, pp. 387–395, 2006. http://dx.doi.org/10.1109/TEC.2006.874223
[23] G. C. Stone and V. Warren, “Effect of manufacturer, winding age and insulation type on stator winding partial discharge levels,” IEEE Electr. Insul. Mag., vol. 20, no. 5, pp. 13–17, 2004. http://dx.doi.org/10.1109/MEI.2004.1342428
[24] G. C. Stone, M. K. W. Stranges, and D. G. Dunn, “Recent developments in IEEE and IEC standards for off-line and on-line partial discharge testing of motor and generator stator windings,” in 2014 IEEE Petroleum and Chemical Industry Technical Conference (PCIC), Nov. 2014, pp. 79–84. http://dx.doi.org/10.1109/PCICON.2014.6961921
[25] W. S. Lee, D. L. Grosh, F. A. Tillman, and C. H. Lie, “Fault Tree Analysis, Methods, and Applications ? A Review,” IEEE Trans. Reliab., vol. R-34, no. 3, pp. 194–203, 1985. http://dx.doi.org/10.1109/TR.1985.5222114
[26] P. A. Crosetti, “Computer Program for Fault Tree Analysis,” Richland (DC), Apr. 1969.
[27] W. G. Schneeweiss, Tutorial on Advanced Concepts in Fault Tree Analysis. Hagen (DE): FernUniversität in Hagen, 1984.
[28] A. A. Baig, R. Ruzli, and A. B. Buang, “Reliability Analysis Using Fault Tree Analysis: A Review,” Int. J. Chem. Eng. Appl., vol. 4, no. 3, pp. 169–173, 2013.
[29] B. M. Ayyub, Risk analysis in engineering and economics. London (UK): Chapman and Hall/CRC, 2014.
[30] NW Power and Dongfang Electric, Thermodynamic Performance for Model N300-16.7-538-538-8 Turbine. Rembang (ID): PLTU 1 Jawa Tengah Rembang.
[31] NW Power and Dongfang Electric, Turbine Operation Manual. Rembang (ID): PLTU 1 Jawa Tengah Rembang.
[32] NW Power and Dongfang Electric, Electric Operation Manual Generator and Electrical Equipment. Rembang (ID): PLTU 1 Jawa Tengah Rembang.
[33] PT PLN, SPLN K5.007 - 2020 Pengujian Generator. Jakarta (ID): PT. PLN, 2020.
[34] IEEE, “Guide for the Rewind of Synchronous Generators, 50 Hz and 60 Hz, Rated 1 MVA and Above.” 2009.
[35] A. Sinha, Sinha Ashutosh Kumar, and A. Anand, “A Next-Gen Power Generation Using Simulation And Machine Learning Forecasting,” Int. J. Sci. Res. Comput. Sci. Eng., vol. 9, no. 1, pp. 56–65, 2021.
[36] C. C. Okolo, E. J. Uduh, I. C. Ezeugbor, N. Okwuelu, and O. M. Sani, “Improving the Transient Stability of Ajaokuta Bus in the Nigerian 330KV Transmission System Using Proportional Integral Based VSC-HVDC Method,” World Acad. J. Eng. Sci., vol. 7, no. 2, pp. 92–99, 2020.