Global Nuclear Safety
National Research Nuclear University "MEPhI"
online version: ISSN 2499-9733
print version: ISSN 2305-414Х
2018-2(27)
Design, manufacturing and commissioning of nuclear industry equipment
| Article Name | Ferroerezonans Emergency in the 24 kV Generator Voltage Circuits of NPP Units |
|---|---|
| Authors | S.А. Baran*, V.V. Nechitajlov**, V.V. Krasnokutskij*** |
| Address | Volgodonsk Engineering Technical Institute the branch of National Research Nuclear University “MEPhI”, |
| Abstract | The paper analyzes the causes leading to false protection and shutdown of NPP units as well as damage to the measuring voltage transformers installed in the generator voltage network. The reasons that lead to the appearance of ferroresonance phenomena in the network and the way to eliminate them are considered. A number of emergency shutdowns of power units from the network by the action of earth fault protection are observed in the network of NPP generator voltage. According to the emergency situation investigations some of them turned out to be false. The cause of false accidents is often the appearance of ferroresonance phenomena in the network caused by load switching, short-time arcing and a number of other reasons. When a ferroresonance occurs it is well known that in many cases it is possible to have high multiplicities of overvoltages, dangerous for voltage transformers and for interturn isolation of the generator. This article analyzes the possibility of manifesting ferroresonance phenomena in the generator voltage network of NPP power units under various emergency conditions. |
| Keywords | ferroresonance, generator voltage, isolated neutral, voltage transformer, overvoltage |
| Language | Russian |
| References | [1] Alekseev V.G., Ziherman M.H. Ferrorezonans v setjah 6-10 kV [Ferroresonance in 6-10 kV Networks]. Elektricheskie stancii [Electric Stations], 1978, №1, pp. 63–65. (in Russian) [2] Petrov O.A. Smeshhenie nejtrali pri pofaznyh otkljuchenijah i obryvah faz v kompensirovannoj seti [The Neutral Bias for Phase-Out Tripping and Phase Failure in Compensated Network]. Elektricheskie stancii [Electric Stations], 1972, №9, pp. 57–61. (in Russian) [3] Halilov F.H. Eshhe raz o dugovyh perenaprjazhenijah v raspredelitelnyh setjah 6-35 kV [Once Again about Arc Overvoltages in Distribution Networks 6-35 kV.]. Promyshlennaja energetika [Industrial Power Engineering], 1985, №11. pp. 37–41. (in Russian) [4] Jel-Hatib Adna Ibragim. Ferrorezonansnye processy v transformatorah naprjazhenija sistem elektrosnabzhenija i sposoby ih predotvrashhenija [Ferroresonance Processes in Voltage Transformers of Power Supply Systems and Ways to Prevent Them]. Dissertacija na soiskanie uchenoj stepeni kandidata tehnicheskih nauk [Theses of PhD in Engineering]. Donetsk. Pub. Donskoj politehnicheskij institute [Don Polytechnic Institute], 1992, 132 p. (in Russian) [5] Bazutkin V.V., Larionov V.P., Pintal Ju.S. Tehnika vysokih naprjazhenij: Izoljacija i perenaprjazhenija v elektricheskih sistemah [High Voltage Technology: Isolation and Overvoltage in Electrical Systems]. M. Pub. Elektroatomizdat [Electroatomizdat], 1986, 464 p. (in Russian) [6] Lihachev F.A. Zamykanija na zemlju v setjah s izolirovannoj nejtralju i s kompensaciej emkostnyh tokov [Ground Faults in Networks with Isolated Neutral and with Compensation of Capacitive Currents]. M. Pub. Energija [Energy], 1971, 152 p. (in Russian) [7] Gindullina F.A., Goldshtejn V.G., Duzolzon A.A., Halilov F.H. Perenaprjazhenija v seti 6-35 kV [Overvoltages in 6-35 kV Network]. M. Pub. Energoatomizdat [Electroatomizdat], 1989, 192 p. (in Russian) [8] Sirota I.M., Bogachenko A.E. Zashhita ot zamykanij na zemlju na storone generatornogo naprjazhenija blokov generator-transformator, ohvatyvajushhaja nejtral generator [Earth-Fault Protection on the Generator Voltage Side of Generator-Transformer Blocks Covering the Generator's Neutral]. Kiev. Pub. IED AN USSR [IED Academy of Sciences of the Ukrainian SSR], 1972, 21 p. (in Russian) [9] Sivokobylenko V.F., Lebedev V.K.. Perehodnye processy v sistemah jelektrosnabzhenija sobstvennyh nuzhd elektrostancij [Transient Processes in Power Supply Systems of Power Plants Own Needs]. Donetsk. Pub. ROA DonNTU [ROA DonNTU], 2002, 136 p. (in Russian) [10] Sirotinskij L.I. Tehnika vysokih naprjazhenij. Volnovye processy i vnutrennie perenaprjazhenija v jelektricheskih sistemah [Technique of High Stresses. Wave Processes and Internal Overvoltages in Electrical Systems]. M. Pub. Gosenergoizdat [Gosenergoizdat], 1959. (in Russian) [11] Halilov F.H., Evdokunin G.A., Poljakov V.S. etc. Zashhita setej 6-35 kV ot perenaprjazhenij [Protection of 6-35 kV Overvoltage Networks]. Sankt-Peterburg. Pub. Energoatomizdat [Electroatomizdat], 2002. (in Russian) [12] Bazylev B.I., Brjancev A.M., Dolgopolov A.G. etc. Dugogasjashhie reaktory s avtomaticheskoj kompensaciej emkostnogo toka zamykanija na zemlju [Arc Suppression Reactors with Automatic Compensation of the Capacitive Earth Fault Current]. Sankt-Peterburg. Pub. PEIPK [PEIC], 1999. (in Russian) [13] Beljakov N.N. Issledovanie perenaprjazhenij pri dugovyh zamykanija na zemlju v setjah 6 i 10 kV s izolirovannoj nejtralju [Survey of Overvoltages with Arc Faults on Ground in 6 and 10 kV Networks with Isolated Neutral]. Elektrichestvo [Electricity], 1957, №5, pp. 31–36. (in Russian) [14] Sivokobylenko V.F., Dergiljov M.P. Rezhimy raboty nejtrali raspredelitelnyh setej 6-10 kV [Operating Modes of Neutral Distribution Networks 6-10 kV]. Sbornik nauchnyh trudov DonGTU. Serija: elektrotehnika i energetika [Collection of Scientific Works of DonSTU. Series: Electrical Engineering and Power Engineering], Issue 67. Donetsk. Pub. DonNTU [DonNTU], 2003, pp. 49–58. (in Russian) [15] Sivokobylenko V.F., Lebedev V.K., Mahinda Silva. Analiz processov dugovyh zamykanij na zemlju v setjah sobstvennyh nuzhd TES i AES [Analysis of the Processes of Arc Faults on the Ground in the Auxiliary Networks of TPPs and NPPs]. Sbornik nauchnyh trudov DonGTU. Serija: Elektrotehnika i energetika [Collection of Scientific Works of DonSTU. Series: Electrical Engineering and Power Engineering], Issue 17. Doneck. Pub. DonGTU [DonNTU], 2000, pp. 129–133. (in Russian) [16] Dergilev M.P., Obabkov V.K. Nesnizhaemye kratnosti perenaprjazhenij v seti 6-35 kV s rezistivnym zazemleniem nejtrali [Non-Reducible Multiplicities of Overvoltages in the 6-35 kV Network with Resistive Neutral Grounding of the Neutral]. Nauka, tehnika, biznes v energetike [Science, Technology, Business in the Energy Sector], 2002, №5, pp. 10–14. (in Russian) [17] Kalantarov P.L., Cejtlin L.A. Raschet induktivnostej [Calculation of Inductances]. Leningrad. Pub. Energoatomizdat [Electroatomizdat], 1986, 488 p. (in Russian) [18] Neklepaev B.N., Krjuchkov I.P. Jelektricheskaja chast jelektrostancij i podstancij: Spravochnye materialy dlja kursovogo i diplomnogo proektirovanija [Electric Part of Power Plants and Substations: Reference materials for course and diploma design]. M. Pub. Energoatomizdat [Electroatomizdat], 1989, 608 p. (in Russian) |
| Papers | 56 - 65 |
| URL Article | URL Article |
| Open Article |