https://oldena.lpnu.ua/handle/ntb/45664| Title: | Overvoltages in MV Industrial Grid under Ground Faults |
| Other Titles: | Перенапруги в промисловій мережі СН під час замикань на землю |
| Authors: | Варецький, Юрій Varetsky, Yuriy |
| Affiliation: | Національний університет “Львівська політехніка” Lviv Polytechnic National University |
| Bibliographic description (Ukraine): | Varetsky Y. Overvoltages in MV Industrial Grid under Ground Faults / Yuriy Varetsky // Energy Engineering and Control Systems. — Lviv : Lviv Politechnic Publishing House, 2019. — Vol 5. — No 2. — P. 75–80. |
| Bibliographic description (International): | Varetsky Y. Overvoltages in MV Industrial Grid under Ground Faults / Yuriy Varetsky // Energy Engineering and Control Systems. — Lviv : Lviv Politechnic Publishing House, 2019. — Vol 5. — No 2. — P. 75–80. |
| Is part of: | Energy Engineering and Control Systems, 2 (5), 2019 |
| Issue: | 2 |
| Issue Date: | 26-Feb-2019 |
| Publisher: | Lviv Politechnic Publishing House |
| Place of the edition/event: | Львів Lviv |
| Keywords: | електрична мережа методи заземлення перехідна перенапруга перехідні переривчасті короткі замикання electrical grid grounding methods transient overvoltage transient intermittent faults |
| Number of pages: | 6 |
| Page range: | 75-80 |
| Start page: | 75 |
| End page: | 80 |
| Abstract: | Електричні розподільні мережі середньої напруги здебільшого працюють із незаземленими нейтральними
точками трансформаторів. Філософія цих електричних мереж основана на припущенні, що вони є більш
надійними, ніж мережі з заземленою нейтраллю. Однак перехідні струми однофазних або багатократних замикань
на землю, які в основному залежать від ємності фаз на землю використовуваних кабелів, що підключені до шин
підстанцій електромережі, часто мають переривчастий характер унаслідок виникнення дуги. Більше того, такий
тип дугового замикання на землю в незаземленій системі спричиняє значно вищі від номінальних перехідні
перенапруги. Як наслідок, це може бути небезпечним для електричних пристроїв, підключених до цієї
енергосистеми. Стаття присвячена перехідним перенапругам на електроприводах з регульованою швидкістю, які
виникають унаслідок замикань на землю в промисловій мережі. Для моделювання перехідних процесів у системі
під час переривистих замикань використовувалося програмне забезпечення Matlab/Simulink. Medium voltage distribution power grids mostly operate with ungrounded neutral points of transformers. The philosophy of these electrical grids is based on the assumption that they are more reliable than grids with grounded neutral. However, transient currents during single phase or multiple faults to ground, depending mostly on the phase to ground capacitances of the used cables connected to power grid substation buses, frequently have intermittent nature due to arising arc. Moreover, this kind of arc ground fault on the ungrounded system causes transient overvoltages significantly higher than the nominal value. In the consequence, it may be dangerous for the electrical devices connected to the power system. The article focuses on the transient overvoltages on the adjustable speed drives due to ground faults within the industrial grid. The Matlab/Simulink Software was used for modeling system transients during intermittent faults |
| URI: | https://ena.lpnu.ua/handle/ntb/45664 |
| Copyright owner: | © Національний університет “Львівська політехніка”, 2019 |
| References (Ukraine): | 1. Hou D. Comparing Fault Resistance Coverage of Different Distribution System Grounding Methods. 37th Annual Western Protective Relay Conference, October 2010. 2. Agrawal K. C. Electrical Power Engineering Reference & Applications Handbook. Chapter 20. Temporary over-voltages and system grounding, 2007, p. 759–772. 3. Varetsky Y., Seheda M., Taran I. Modeling transients in compensated electrical grids during line faults. Proceedings – Int.Conf. on Modern Electric Power Systems, MEPS 2015, Wroclaw, Poland – July 6–9, 2015. 4. Varetsky Y., Gapanovych V., Fedonjuk M. Modeling transient surge on filter reactor during external earth faults. Poznan University of Technology Academic Journals. Electrical Engineering, No. 80, 2010. P. 65–66. 5. Ravlić S., Marušić A. Simulation Models for Various Neutral Earthing Methods in Medium Voltage Systems. 25th DAAAM Int. Symp. on Intelligent Manufacturing and Automation, DAAAM 2015, Procedia Engineering 100 (2015), p. 1182–1191. 6. Feng S., Zheng L., Lie J., Sun Y., Chen G., Ji X. Research on Arc-grounding Overvoltage in the 10kV Distribution System. 2012 Int. Conf. on Future Energy, Environment, and Materials, Energy Procedia 16 (2012), p. 1785–1791. 7. Beliakov N.N. Studying voltages during arcing line to ground faults in 6–10 kV networks. Electrichestvo, 1957, No. 5, p. 31–36. (in Russian) 8. Varetsky Y., Bachor Z., Ravlyk A. Transients in 10–35 kV electric networks with ungrounded neutrals under earth faults. Proc. of VII Int. Symp. „Short Circuit Currents in Power Systems”, Warsaw, 1996, p. 1.20.1–1.20.4. 9. Varetsky Y., Pavlyshyn R., Taran I. Transients due to capacitor switching in industrial supply system. Proc. of VII Science-Technical Conference SIECI-2012, September 19–21, Szklarska Poreba, Poland, Paper 4.5, P.1–6. |
| References (International): | 1. Hou D. Comparing Fault Resistance Coverage of Different Distribution System Grounding Methods. 37th Annual Western Protective Relay Conference, October 2010. 2. Agrawal K. C. Electrical Power Engineering Reference & Applications Handbook. Chapter 20. Temporary over-voltages and system grounding, 2007, p. 759–772. 3. Varetsky Y., Seheda M., Taran I. Modeling transients in compensated electrical grids during line faults. Proceedings – Int.Conf. on Modern Electric Power Systems, MEPS 2015, Wroclaw, Poland – July 6–9, 2015. 4. Varetsky Y., Gapanovych V., Fedonjuk M. Modeling transient surge on filter reactor during external earth faults. Poznan University of Technology Academic Journals. Electrical Engineering, No. 80, 2010. P. 65–66. 5. Ravlić S., Marušić A. Simulation Models for Various Neutral Earthing Methods in Medium Voltage Systems. 25th DAAAM Int. Symp. on Intelligent Manufacturing and Automation, DAAAM 2015, Procedia Engineering 100 (2015), p. 1182–1191. 6. Feng S., Zheng L., Lie J., Sun Y., Chen G., Ji X. Research on Arc-grounding Overvoltage in the 10kV Distribution System. 2012 Int. Conf. on Future Energy, Environment, and Materials, Energy Procedia 16 (2012), p. 1785–1791. 7. Beliakov N.N. Studying voltages during arcing line to ground faults in 6–10 kV networks. Electrichestvo, 1957, No. 5, p. 31–36. (in Russian) 8. Varetsky Y., Bachor Z., Ravlyk A. Transients in 10–35 kV electric networks with ungrounded neutrals under earth faults. Proc. of VII Int. Symp. "Short Circuit Currents in Power Systems", Warsaw, 1996, p. 1.20.1–1.20.4. 9. Varetsky Y., Pavlyshyn R., Taran I. Transients due to capacitor switching in industrial supply system. Proc. of VII Science-Technical Conference SIECI-2012, September 19–21, Szklarska Poreba, Poland, Paper 4.5, P.1–6. |
| Content type: | Article |
| Appears in Collections: | Energy Engineering And Control Systems. – 2019. – Vol. 5, No. 2 |
| File | Description | Size | Format | |
|---|---|---|---|---|
| 2019v5n2_Varetsky_Y-Overvoltages_in_MV_Industrial_75-80.pdf | 383.12 kB | Adobe PDF | View/Open | |
| 2019v5n2_Varetsky_Y-Overvoltages_in_MV_Industrial_75-80__COVER.png | 386.26 kB | image/png | View/Open |
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