A test-bed for researching the interactions of underexcitation and overexcitation limiters of synchronous generators with protection functions.
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Date
2019
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Abstract
A test-bed implemented in a real-time digital simulation environment is presented in this article to perform coordination studies between protection functions and excitation
limiters of automatic voltage regulators of synchronous generators.
A hardware-in-the-loop simulation is implemented in laboratory to
test and evaluate several protection schemes during underexcited
and overexcited events. The interactions among the underexcitation
and overexcitation limiters (UEL and OEL) with these protection
functions are investigated, and the best settings for their coordination are proposed. This article increases the scope of [1] and [2]
by including the interactions among the protection functions ANSI
24 (V/Hz), ANSI 59 (overvoltage), and ANSI 81 (underfrequency
and overfrequency) with the OEL, and the interactions among
the protection functions ANSI 21 (distance) and ANSI 27 (undervoltage) with the UEL in addition to the coordination between
the protection function ANSI 40 (loss of excitation) and the UEL.
Thus, the appropriate settings for these protection and controls are
proposed for the excitation system developed. The main results are
presented and discussed.
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Keywords
Excitation system, Real-time digital simulator - RTDS, Underexcitation limiter - UEL
Citation
COELHO, A. L. M.; SILVEIRA, P. M. da; BARACHO, F. R. A. C. A test-bed for researching the interactions of underexcitation and overexcitation limiters of synchronous generators with protection functions. IEEE Transactions on Industry Applications, v. 55, n. 6, p. 5717-5726, 2019. Disponível em: <https://ieeexplore.ieee.org/document/8820072>. Acesso em: 10 mar. 2020.