DocumentCode :
1678791
Title :
Resonances and overvoltages in a medium voltage fan motor drive with long cables in an underground mine
Author :
Rodríguez, J. ; Pontt, J. ; Silva, C. ; Musalem, R. ; Newman, P. ; Fuentes, S.
Author_Institution :
Dept. of Electron. Eng., Federico Santa Maria Univ., Valparaiso, Chile
Volume :
2
fYear :
2004
Firstpage :
1101
Abstract :
Underground mining is characterized by space constraints forcing the use of long cables to feed large machines, where the application of variable speed drives can generate overvoltages at the machine terminals. This paper presents the analysis and mitigation of harmful overvoltages detected in inverter-fed 1400 HP 13.8 KV motors used for air ventilation in an underground mine. The possible causes of the overvoltages, namely wave reflection and resonance are described theoretically and simulated. On-site direct voltage measurements at the 13.8 kV motor terminals confirmed that resonance was the dominant phenomenon. Based on this study a suitable low-pass filter was designed, constructed and installed. Finally, the adequate operation of such filter is demonstrated by further on-site measurements.
Keywords :
fans; low-pass filters; mining industry; motor drives; overvoltage; power cables; variable speed drives; voltage measurement; 13.8 kV; 1400 hp; air ventilation; low-pass filter; machine terminal overvoltage; medium voltage fan motor drive; underground mine long cables; variable speed drives; voltage measurement; Cables; Character generation; Feeds; Low pass filters; Medium voltage; Motor drives; Resonance; Surges; Variable speed drives; Ventilation;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Industry Applications Conference, 2004. 39th IAS Annual Meeting. Conference Record of the 2004 IEEE
ISSN :
0197-2618
Print_ISBN :
0-7803-8486-5
Type :
conf
DOI :
10.1109/IAS.2004.1348550
Filename :
1348550
Link To Document :
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