Title :
On-line insulation monitoring of heavy duty coal face electrical drives using zero sequence current harmonics
Author :
Mittra, Dilip Kumar ; Chatterjee, Tarun Kumar
Author_Institution :
Dept. of Eng. & Min. Machinery, Indian Sch. of Mines, Dhanbad, India
Abstract :
One of the major drawbacks of a restricted-neutral system of electrical power supply used in underground coal mines of many countries is the lack of on-line insulation monitoring facility and early warning capability during deterioration of system insulation level. The paper outlines a novel technique of noninvasive on-line insulation monitoring for a restricted neutral system of power supply using harmonics content of zero sequence current reflected in the secondary winding of a core balance transformer
Keywords :
computerised monitoring; electric drives; industrial power systems; insulation testing; machine insulation; machine testing; magnetic cores; mining; nondestructive testing; power system harmonics; power transformers; transformer cores; transformer windings; core balance transformer; early warning capability; electrical drives; harmonics content; heavy duty coal face; noninvasive on-line insulation monitoring; on-line insulation monitoring; restricted-neutral power supply system; secondary winding; underground coal mines; zero sequence current; zero sequence current harmonics; Cable insulation; Dielectrics and electrical insulation; Earth; Electrical fault detection; Face detection; Monitoring; Power supplies; Power system harmonics; Power transformer insulation; Transformer cores;
Conference_Titel :
Power Electronics, Drives and Energy Systems for Industrial Growth, 1996., Proceedings of the 1996 International Conference on
Conference_Location :
New Delhi
Print_ISBN :
0-7803-2795-0
DOI :
10.1109/PEDES.1996.536398
