Abstract
The paper presents an algorithm that is used to detect the loss of excitation (LOE) of synchronous generators. The algorithm is implemented on the principle of a digital phase comparison in the time domain. The digital phase comparator calculates the integral of the instantaneous power of the input signals. The algorithm uses the currents and corresponding line voltages obtained by the measurements available at the terminal of the generator as their input signals. The input signals are phase-compared on the basis of the value of loss of excitation index after which the LOE is detected. The software package MATLAB/Simulink includes the test power system along with the synchronous generator which simulates the phenomenon of LOE. The algorithm has been tested for total and partial LOE and stability power swing for different operating modes of a synchronous generator. The test results show good properties of the proposed algorithm.
Similar content being viewed by others
References
Wang W (2002) Principle and application of electric power equipment protection. China Electric Power Press, Beijing
Kundur P (1994) Power system stability and control. McGraw-Hill, New York
Mason CR (1949) A new loss of excitation relay for synchronous generators. Trans Am Inst Electr Eng 68(2):1240–1245
Tremaine RL, Blackburn JL (1954) Loss-of-field protection for synchronous machines. Trans Am Inst Electr Eng 73(11):765–772
Berdy J (1975) Loss of excitation protection for modern synchronous generators. IEEE Trans Power Appar Syst PAS–94(5):1457–1463
Herrman HJ, Smit A (2009) Increased sensitivity of loss of field protection based on admittance measurement. In: Western protective relay conference, Washington, DC, USA, October 2009, pp 1–15
Li L, Caixin S, Daohuai M (2005) Study on the excitation protection and control of synchronous generator based on the \(\delta \) and s. In: IEEE/PES transmission and distribution conference and exposition: Asia and Pacific. China, August 2005, Dalian, pp 1–4
Tambay SR, Paithankar YG (2005) A new adaptive loss of excitation relay augmented by rate of change of reactance. In: IEEE power engineering society of general meeting, San Francisco, CA, USA, Jun 2005, 2, pp 1831–1835
Usta O, Musa MH, Bayrak M, Redfern MA (2007) A new relaying algorithm to detect loss of excitation of synchronous generators. Turk J Electr Eng Comput Sci 15(3):339–349
Yaghobi H, Mortazavi H, Ansari K, Rajabi Mashhadi H, Khorashadizadeh H, Borzoe H (2013) Study on application of flux linkage of synchronous generator for loss of excitation detection. Int Trans Electr Energy Syst 23(6):802–817
Yaghobi H, Mortazavi H (2015) A novel method to prevent incorrect operation of synchronous generator loss of excitation relay during and after different external faults. Int Trans Electr Energy Syst 25(9):1717–1735
Shi ZP, Wang JP, Gajic Z, Sao C (2012) The comparison and analysis for loss of excitation protection schemes in generator protection. In: International conference on developments in power systems protection, Birmingham, UK, April 2012, pp 1–6
Sharaf AM, Lie TT (1994) Ann based pattern classification of synchronous generator stability and loss of excitation. IEEE Trans. Energy Convers 9(4):753–759
Fan B, Li X, Xue P, Liu J (2009) The research UL-P of loss-of-excitation protection for generator based on the artificial neural networks. In: Asia Pacific power and energy engineering conference, Wuhan, China, March 2009, pp 1–4
de Morais AP, Cardoso G, Mariotto L (2010) An innovative loss-ofexcitation protection based on the fuzzy inference mechanism. IEEE Trans Power Deliv 25(4):2197–2204
Abdel Aziz MS, Elsamahy M, Moustafa Hassan MA, Bendary FMA (2017) A novel study for hydro-generators loss of excitation faults detection using ANFIS. Int J Model Simul 37(1):36–45
Bi T, Sui J, Yu H, Yang Q (2011) Adaptive loss of field protection based on phasor measurements. In: IEEE Power and Energy Society General Meeting, San Diego, CA, USA, July 2011, pp 1–4
Aziz K, Tripathy M, Maheshwari RP (2014) Loss of field protection of synchronous generator using SVM. Int J Electron Electr Eng 7(7):649–656
Pajuelo E, Gokaraju R, Sachdev MS (2013) Identification of generator loss-of-excitation from power-swing conditions using a fast pattern classification method. IET Gener Transm Distrib 7(1):24–36
Amraee T (2013) Loss-of-field detection in synchronous generators using decision tree technique. IET Gener Transm Distrib 7(9):943–954
Amini M, Davarpanah M, Sanaye-Pasand MA (2015) A novel approach to detect the synchronous generator loss of excitation. IEEE Trans Power Deliv 30(2):1429–1438
Ghorbani A, Soleymani S, Mozafari B (2015) A PMU-based LOE protection of synchronous generator in the presence of GIPFC. IEEE Trans Power Deliv 31(99):551–558
Morais AP, Bretas AS, Meyn S, Cardoso G (2016) Adaptive Mho relay for synchronous generator loss-of-excitation protection: a capability curve limit-based approach. IET Gener Transm Distrib 10(14):3449–3457
Mahamedi B, Zhu JG, Hashemi SM (2016) A setting-free approach to detecting loss of excitation in synchronous generators. IEEE Trans Power Deliv 31(5):2270–2278
Stojanović Z, Djurić M (2011) The algorithm for directional element without dead tripping zone based on digital phase comparator. Electr Power Syst Res 81:377–383
Zubić S, Djurić M (2012) A distance relay algorithm based on the phase comparison principle. Electr Power Syst Res 92:20–28
Stojanović Z, Djurić M (2013) An algorithm for directional earth-fault relay with no voltage inputs. Electr Power Syst Res 93:144–149
Krstivojević J, Djurić M (2014) A new method of improving transformer restricted earth fault protection. Ad Electr Comput Eng 14(3):41–48
Author information
Authors and Affiliations
Corresponding author
Appendix
Appendix
1.1 Generator data
1.2 Step-up transformer data
1.3 Lines data
1.4 Infinite bus data
Rights and permissions
About this article
Cite this article
Ostojić, M., Djurić, M. The algorithm for the detection of loss of excitation of synchronous generators based on a digital-phase comparator. Electr Eng 100, 1287–1296 (2018). https://doi.org/10.1007/s00202-017-0586-3
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s00202-017-0586-3