Abstract
It was revealed that one of the main reasons for erroneous operation of relay protection devices (RPs) is it being set in a way that does not correspond with the real operating conditions, which in turn is determined by the design procedures of the RP settings. An analysis of modern methodologies of RP adjustment revealed that there are no significant changes as compared with the guidelines of the past decades and, accordingly, there are the same disadvantages. The development of new adjustment techniques using detailed mathematical models taking into account the features of specific RPs and the processes in the measuring converters are considered in the work. Within the framework of solving this problem, mathematical models of measuring part of digital relay protection for various types of intermediate current transformers (ICTs) (active and passive) and filters (of Butterworth and Chebyshev types) are synthesized and a comparative analysis is done of their influence on the output signal waveform in the MATLAB software package, including taking into account the magnetization of measuring current transformers. It is revealed that the simplest (explicit and implicit Euler methods) numerical methods are not suitable to solving the created mathematical models. A comparative analysis of calculation results by these methods and by the more advanced Runge–Kutta method is conducted. The presented theoretical and practical studies made it possible to reliably formulate the requirements for detailed mathematical models of RPs.
Similar content being viewed by others
REFERENCES
Andreev, M.V., Ruban, N.Yu., Gordienko, I.S., Borovikov, Yu.S., Gusev, A.S., and Suleimanov, A.O., Vserezhimnoe matematicheskoe modelirovanie releinoi zashchity elektroenergeticheskikh sistem (Multimode Mathematical Modeling of Relay Protection of Electric Power Systems), Tomsk: Tomsk. Gos. Politekh. Univ., 2016.
Suvorov, A.A., Gusev, A.S., Suleimanov, A.O., and Andreev, M.V., The problem of verification of modeling tools for electrical power systems and its solution concept, Vestn. Ivanovsk. Gos. Energ. Univ., 2017, no. 1.
Andreev, M.V., Ruban, N.Yu., Suvorov, A.A., and Ufa, R.A., Investigation of the measuring part of digital devices of relay protection, Izv. Vyssh. Uchebn. Zaved., Elektromekh., 2017, no. 5.
Afanas’ev, V.V., Adon’ev, N.M., Zhalalis, L.V., et al., Transformatory toka (Current Converters), Leningrad: Energiya, 1980.
Ovcharenko, N.I., Digital hardware and software for microprocessor relay protection and automation of power systems, in Biblioteka elektrotekhika (Library of Electrical Engineer), Moscow: Energoprogress, 2006, nos. 5–6 (89–90).
Johnson, D., Johnson, J., and Moore, H., A Handbook of Active Filters, Englewood Cliffs, NJ: Prentice-Hall, 1980.
Ovcharenko, N.I., Analog elements of microprocessor-based relay protection and automation systems, in Biblioteka elektrotekhika (Library of Electrical Engineer), Moscow: Energoprogress, 2001, no. 9 (33).
Funding
This study was supported by the Russian Foundation for Basic Research, research project no. 16-38-60043mol_a_dk.
Author information
Authors and Affiliations
Corresponding author
Additional information
Translated by M. Kromin
About this article
Cite this article
Andreev, M.V. Investigation of Processes in the Measuring Part of Digital Devices of Relay Protection in the MATLAB Software Package. Russ. Electr. Engin. 90, 530–537 (2019). https://doi.org/10.3103/S1068371219070022
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.3103/S1068371219070022