Title :
A Study on the Improved Performance of Half-LENS-Half-MHO Relays
Author :
Li, M.S. ; Cheng, T.C. ; Wu, C.Y.
Author_Institution :
Nanjing Automation Research Institute
Abstract :
MHO type directional impedance relay has been widely used in HV and EHV systems for many years, but its misoperation under certain fault conditions has been a major problem. One such instance is that relays on unfaulted phases will misoperate during a close-in S-L-G fault with fault resistance. The other is the misoperation of MHO relay during a reverse fault with fault resistance.
Keywords :
Digital relays; Impedance; Power & Energy Society; Power system analysis computing; Power system modeling; Power system protection; Power system relaying; Protective relaying; Transactions Committee; Voltage;
Journal_Title :
Power Apparatus and Systems, IEEE Transactions on
DOI :
10.1109/TPAS.1984.318384
