A New Admittance Approach Applicable to the Coordination Between the Loss-of-Excitation Protection and the Underexcitation Limiter

Authors

Keywords:

admittance plane, ansi 40 protection, Hardware in the Loop, underexcitation limiter, coordination

Abstract

The performance of salient-pole synchronous generators protection is of great importance for the stability of power systems, as they are present in large hydropower plants, subject to various abnormal operating conditions such as three-phase or two-phase faults, electromechanical disturbances and loss-of-excitation. In this context, this work proposes a testing philosophy of salient-pole synchronous generators, in order to define more accurately the setting of the protections and controls of this asset. Thus, in the developed methodology, the admittance plan (G-B) proves applicable to analyze the coordination between the loss-of-excitation protection and the underexcitation limiter, as an alternative to the power (P-Q) and impedance (R-X) planes, normally employed in literature. In modeling the problem, real data for both the hydrogenerators and the electrical network are used. The simulations were performed in a hardware-in-the loop scheme integrated by a Real Time Digital Simulator and a physical relay. Thus, analyzes are made for situations of stable power swing and partial and total loss-of-excitation. The results are useful to prove, through the monitoring of relevant variables of the hydrogenerators, the feasibility and accuracy of the G-B plane in the coordination between the protection and the control of the synchronous machine.

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Author Biographies

Francisco Baracho, UFOP - Federal University of Ouro Preto

Francisco R. A. C. Baracho received the B.Sc., M.Sc., and D.Sc. degrees in electrical engineering from the Federal University of Minas Gerais (UFMG), Brazil, in 1986, 1992 and 2018, respectively, and a second master's degree in energy planning from the University of Sheffield, Sheffield, U.K., in 2002. He is currently a Professor and Researcher with the Federal University of Ouro Preto, Brazil. His interests are power systems protection, electromagnetic transients, and renewable energy.

Aurélio Coelho, Federal University of Itajuba (UNIFEI)

Aurelio L. M. Coelho received the B.Sc. degree in electrical engineering from the Federal University of Maranhão (UFMA), Brazil, in 2010, and the M.Sc. and D.Sc. degrees in electrical engineering from Federal University of Itajuba (UNIFEI), Brazil, in 2011 and 2016, respectively. He is currently a Professor and Researcher with the Group of Practical Applied to Power Systems (GPRAS), UNIFEI. His interests are power systems protection, power quality, and electromagnetic transients.

Clever Pereira Filho, Federal University of Minas Gerais (UFMG)

Clever S. Pereira Filho received the B.Sc. degree in electrical engineering from the Federal University of Minas Gerais (UFMG), Brazil, in 1978, and the M.Sc. and D.Sc. degrees in electrical engineering from the Federal University of Rio de Janeiro (COPPE/UFRJ), Brazil, in 1983 and 1997, respectively. He is currently a Full Professor and Researcher with the Federal University of Minas Gerais. His interests are power systems protection, signal processing for fault identification, and electromagnetic transients.

Laerty Damião, Federal University of Itajuba (UNIFEI)

Laerty J. S. Damiao received the B. Sc. degree in electrical engineering from the Federal University of Ouro Preto (UFOP), Brazil, in 2019. He is currently pursuing the M.Sc. degree in electrical engineering at Federal University of Itajuba (UNIFEI), Brazil. His interests are condition monitoring of high voltage equipment, power systems planning, and power systems protection.

Wilingthon Zvietcovich, Federal University of Ouro Preto (UFOP)

Wilingthon G. Zvietcovich received the B.Sc., M.Sc., and D.Sc. degrees in electrical engineering from the UNSAAC (Peru), UNESP (Brazil) and USP (Brazil), in 1999, 2006 and 2011, respectively. He is currently a Professor and Researcher with the Federal University of Ouro Preto (UFOP), Brazil. His interests are electric power systems planning and power quality.

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Published

2021-03-09

How to Cite

Baracho, F., Coelho, A., Pereira Filho, C., Damião, L., & Zvietcovich, W. (2021). A New Admittance Approach Applicable to the Coordination Between the Loss-of-Excitation Protection and the Underexcitation Limiter. IEEE Latin America Transactions, 18(10), 1732–1742. Retrieved from https://latamt.ieeer9.org/index.php/transactions/article/view/3389

Issue

Vol. 18 No. 10 (2020): Ordinary Issue

Section

Articles