ПОВЫШЕНИЕ НАДЕЖНОСТИ СЕТЕЙ 6–35 кВ ПУТЕМ ПРИМЕНЕНИЯ МЕТОДА STA/LTA

R.R. Sattarov; R.R. Garafutdinov; R.R. Khafizov

doi:10.14529/power180304

Authors

R.R. Sattarov Ufa State Aviation Technical University, Ufa, Russian Federation
R.R. Garafutdinov Ufa State Aviation Technical University, Ufa, Russian Federation
R.R. Khafizov Ufa State Aviation Technical University, Ufa, Russian Federation

DOI:

https://doi.org/10.14529/power180304

Keywords:

single-phase earth faults, reliability, STA/LTA method, SCAD, mode modeling, EPS

Abstract

Quick and accurate detection of single phase to earth faults (SPEF) in electric grids is a relevant problem. However, the existing methods and tools are not always capable of ensuring sufficient quality of such detection, which is why developing SPEF detection tools and methods is an ongoing effort. This paper proposes
an STA/LTA-based SPEF detection method; the STA/LTA method is widely used for detecting seismic activity. The paper describes this method and presents an algorithm of using it to detect SPEF in distribution grids.
An SPEF-detection VBA application has been developed based on this algorithm. To test the method, a cable-grid computer model was made in PSCAD, matching a real-world urban grid segment. The model-generated SPEF voltage and current oscillograms were processed by the developed application. Simulation and computation results analysis can identify STA/LTA trigger thresholds for reliable SPEF detection. Trigger boundaries are defined in relative units, making the method adaptive to changes in grid topology. Therefore, testing
the STA/LTA method by means of a PSCAD model proves its efficiency and great potential for SPEF detection.

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References

Stogniy B.S., Maslyanik V.V., Nazarov V.V. [On the Need to Change the Neutral Modes in 3–35kV Networks]. Energetika i Elektrifikatsiya [Energy and Electrification], 2001, vol. 4, pp. 27–29. (in Russ.)

Shuin V.A., Gusenkov A.V. Zashchity ot zamykaniy na zemlyu v elektricheskikh setyakh 6–10 kV [Protection Against Earth Faults in Electrical Networks 6–10 Square Meters]. Moscow, NTF Energoprogress Publ., Energetik, 2001. 105 p.

Borukhman V.A. [On the Operation of Selective Earth-Fault Protection in the 6–10 kV Networks and Measures for Their Improvement]. Energetik, 2000, vol. 1, pp. 20–22. (in Russ.)

Kholmogorov V.E., Barmasov A.V. Kurs obshchey fiziki dlya prirodopol’zovateley. Kolebaniya i volny: ucheb. posobiye [The Course of General Physics for Naturalists. Oscillations and Waves: Textbook]. St. Petersburg, BKHV-Peterburg Publ., 2009. 244 p.

Riyanov L.N., Nikitin YU.V. [Determination of the Fault Location of the Short-Circuit Line by the CTA/SLA Method]. Materialy konferentsii “VII Slet molodykh energetikov Bashkortostana” [Proceedings of the Conference “VII Meeting of Young Power Engineers in Bashkortostan”], 2016.

Gurvich I.I., Boganik G.N. Seysmicheskaya razvedka. Uchebnik dlya vuzov [Seismic Exploration. Textbook for High Schools]. 3rd ed. Moscow, Nedra Publ., 1980. 551 p.

Avrorov S.A. Razrabotka i issledovaniye metodov i programm geoakusticheskoy lokatsii mobil’nymi seysmicheskimi gruppami [Development and Research of Geoacoustic Methods and Programs by Mobile Seismic Groups]. Novosibirsk, 2010. 436 p.

Havskov J., Alguacil G. Instrumentation in Earthquake Seismology. Springer International Publishing Switzerland, 2016, pp. 149–196. DOI: 10.1007/978-3-319-21314-9_5

Dr. Amadej Trnkoczy. Understanding and Parameter Setting of STA/LTA Trigger Algorithm. Application Note #41, Kinemetrics Inc, 1998. 30 p.

Rui-Sheng Jia. Automatic Event Detection in Low SNR Microseismic Signals Based on Multi-Scale Permutation Entropy and a Support Vector Machine. Springer Science Business Media Dordrecht, 2016, pp. 1–14.

Fischer T. Automatic Location of Swarm Earthquakes from Local Network Data. StudiaGeo s.r.o., Pragu, 2003, pp. 83–98.

Shamis M.A., Ivanov F.A., Konovalov Yu.V. [Modern Hardware and Software for Studying Relay Protection Devices and Automation of Power Systems]. Vestnik Angarskogo gosudarstvennogo tekhnicheskogo universiteta [Bulletin of the Angarsk State Technical University], 2017, no. 11, pp. 70–73. (in Russ.)

Sattarov R.R., Garafutdinov R.R. [Computer Simulation of Short Circuits in the Simplest Electrical Systems – the Possibility of Using in Training]. Elektrotekhnicheskiye kompleksy i sistemy: materialy mezhdunarodnoy nauchno-prakticheskoy konferentsii [Electrotechnical Complexes and Systems: Materials of the International Scientific Conference], Ufa, RIK UGATU Publ., 2016. 294 p.

Perevod vstroyennoy spravki simulyatora PSCAD [Translation of the Built-in Help of the PSSAD Simulator]. Available at: https://ennlab.ru/products/perevod-vstroennoj-spravki-simuljatora-pscad/ (accessed 27.05.2018).

Uokenbakh D. Professional’noye programmirovaniye na VBA v Excel 2002 [Professional BWA Programming in Excel 2002]. Translation from English, Moscow, Izdatel’skiy dom “Vil’yame” Publ., 2003. 784 p.

Bandarenko S. Populyarnyy samouchitel’ Excel 2003 [The Popular Tutorial “Excel 2003”], St. Petersburg,

Piter Publ., 2005. 320 p.