Title :
The new method of monitoring DC system insulation on-line
Author :
Zhao, Chengyong ; Jia, Xiufang ; Zhifang Hao
Author_Institution :
Electr. Power Eng. Dept., North China Electr. Power Univ., Baoding, China
Abstract :
A novel method of detecting an earth fault on a DC system is by the principle of magnetic modulation is proposed in the paper. The method can determine not only individual leakage loop but also the special case of both positive bus wire and negative bus wire insulation fault simultaneously by putting a resistance into the DC bus. Finally, the good results are shown in the paper. The performance of the detecting apparatus is good in the selection loop and strong in anti-interference, as well as it not showing any effect on the DC system through the experiment
Keywords :
electric current measurement; insulation testing; leakage currents; magnetic leakage; power system faults; DC system insulation; anti-interference; earth fault detection; leakage current detection; leakage loop; magnetic modulation; negative bus wire insulation fault; on-line monitoring; positive bus wire insulation fault; power plants; substations; Circuit faults; Earth; Electrical fault detection; Frequency conversion; Insulation; Leak detection; Magnetic flux; Magnetic modulators; Monitoring; Voltage;
Conference_Titel :
Industrial Electronics Society, 2001. IECON '01. The 27th Annual Conference of the IEEE
Conference_Location :
Denver, CO
Print_ISBN :
0-7803-7108-9
DOI :
10.1109/IECON.2001.976600
