ISSN 0021-3454 (print version)
ISSN 2500-0381 (online version)
Menu

2
Issue
vol 67 / February, 2024
Article

DOI 10.17586/0021-3454-2020-63-6-515-521

UDC 62-83

SYSTEM OF INSULATION STATUS MONITORING FOR ELECTRIC DRIVES IN NETWORKS WITH A DEAD-EARTH NEUTRAL

A. S. Anuchin
National Research University “Moscow Power Engineering Institute”, Moscow, 111250, Russian Federation; Head of Chair


Шпак Д. М.
Федеральное государственное бюджетное образовательное учреждение высшего образования "Национальный исследовательский университет "МЭИ"; инженер


R. Strzelecki
Gdańsk University of Technology, Gdańsk, 80-233, Poland; Professor


G. L. Demidova
ITMO University, Saint Petersburg, 197101, Russian Federation; Associate professor


Read the full article 

Abstract. A method for insulation fault detection in variable speed drives operating in TN-networks is proposed. The insulation monitoring system is activated when the electric drive stops. The inverter keys are switched according to a special law, and the leakage current is determined using the current transformer signal, which measures the current in all three phases of the drive simultaneously. The leakage current sensor schematic is considered, and experimental results for various values of insulation resistances are presented. It is shown that the minimum insulation resistance detectable with the method equals approximately to 2 MΩ or lower.
Keywords: insulation fault detection, network with a dead-earth neutral, frequency converter, leakage current, current transformer

References:
  1. Report of large motor reliability survey of industrial and commercial installation in IEEE Transactions on Industry Applications, 1985, no. 4(21), pp. 853–872. 
  2. Zoeller C., Vogelsberger M.A., Wolbank T.M., Ertl H. IET Power Electronics, 2016, no. 15(9),  pp. 2769–2775.
  3. Lee T.M., Chan T.W. Proc. of International Conference on Energy Management and Power Delivery (EMPD '95), 1995, vol. 2, pp. 548–553.
  4. Freschi F. IEEE Transactions on Power Delivery, 2012, no. 3(27), pp. 1629–1635, 
  5. Patent US 8022658 B2, Motor control system including electrical insulation deterioration detecting system, Y. Ide, Sep. 20, 2011.
  6. Zoeller C., Vogelsberger M.A., Nussbaumer P., Wolbank Th.M. International Conference on Electrical Machines (ICEM), 2014, pp. 1901–1907.
  7. Nussbaumer P., Vogelsberger M.A., Wolbank Th.M. IEEE Transactions on Industrial Electronics, 2015, no. 3(62), pp. 1835–1845.
  8. Tsyokhla I., Griffo A., Wang J. IEEE International Electric Machines & Drives Conference (IEMDC), 2015, pp. 1433–1439.
  9. Tsyokhla I., Griffo A., Wang J. IEEE Energy Conversion Congress and Exposition (ECCE), 2019,  pp. 6996–7003.
  10. Tsyokhla I., Griffo A., Wang J. IEEE Transactions on Industrial Electronics, 2019, no. 10(66),  pp. 8126–8135.
  11. Zoeller C., Wolbank Th.M., Vogelsberger M.A. IEEE 11th International Symposium on Diagnostics for Electrical Machines, Power Electronics and Drives (SDEMPED), 2017, pp. 486–492.
  12. Jensen W.R., Strangas E.G., Foster Sh.N. IEEE Transactions on Industry Applications, 2018,  no. 6(54), pp. 5897–5906.
  13. Jensen W.R., Foster Sh.N. IEEE Energy Conversion Congress and Exposition (ECCE), 2019,  pp. 7004–7011.
  14. Jensen W.R., Strangas E.G., Foster Sh.N. IEEE International Electric Machines & Drives Conference (IEMDC), 2019, pp. 203–209.