A new faults blocking method for out-of-step protection

摘要

Modern automatic out-of-step protection devices of allow indication of out-of-step regime during the first cycle. At that, they must fail-safely distinguish malfunctions, such as short circuits. The new method of finding short circuits or other sudden changes of operating parameters is suggested in the article. The developed algorithm was tested through COMTRADE oscillograms obtained at digital-to-analog physical complex OAO NIIPT.