IEEJ Transactions on Power and Energy
Online ISSN : 1348-8147
Print ISSN : 0385-4213
ISSN-L : 0385-4213
Digital Relay techniques on the protection for the Power Capacitor and the AC filter
Ken YanagihashiTakafumi MaedaTokuo EmuraTatsuya IkadaToyoshi Harada
Author information

1994 Volume 114 Issue 7-8 Pages 800-806


The power capacitor and the AC filter are used for the reliable supply of electric power. For the protection of the power capacitor system, the over-load relay must be very accurate, because the operating voltage in power system is nearly the limited level of the power capacitor. For the protection of the AC filter system, the effective value must be detected from the filtercurrent which is mixed of fundamental and harmonics. So, we developed and produced the relay systems using new algorithms, high rate sampling, digital filter, R.M. S. calculation. On this paper, we report the characteristic of the protections and the algorithms.

Information related to the author
© The Institute of Electrical Engineers of Japan
Previous article Next article