Adaptive filtering for noise reduction in the input circuits of protection relay systems

Masahide Abe, Shunsuke Koshita, Masayuki Kawamata, Shogo Miura, Tomoyuki Kawasaki, Katsuhiko Sekiguchi
2010 IEEE PES General Meeting  
This paper describes an adaptive filtering to reduce noise in the analog input circuits of microprocessor-based protection relay (digital relay) systems. Considering that digital relays tend to have multiple functions, it is important to raise signal to noise ratios (SNR) in analog input circuits to a level that will satisfy the requirements of these functions. We have realized a noise reduction method employing an adaptive filter which can be generally applied; not only within digital relays
more » ... in digital relays but also for IEDs in substations and independent of protection schemes. This paper presents the concept of this method and illustrates this effectiveness using a number of examples and experimental results.
doi:10.1109/pes.2010.5588147 fatcat:ypvvv7houjeptpnfwtqiqg6dei