Title :
A new principle for high resistance earth fault detection during fast power swings for distance protection
Author :
Mechraoui, A. ; Thomas, D.W.P.
Author_Institution :
Dept. of Electr. & Electron. Eng., Nottingham Univ., UK
fDate :
10/1/1997 12:00:00 AM
Abstract :
The combined effects of a high impedance ground fault condition and a fast power swing condition cause the apparent impedance `seen´ by power system distance protection schemes to vary over a wide range. Previous research work has shown that the detection and location of high impedance faults during power swings is very difficult. A new principle for high impedance fault detection during fast power swings is presented which overcomes these deficiencies. This method forms a part of a complete power swing relaying scheme and can be implemented on standard relaying hardware. Results are presented based on extensive simulation studies carried out on a typical 400 kV transmission system, using the Electromagnetic Transient program (EMTP)
Keywords :
earthing; electric impedance; fault location; power system analysis computing; power system protection; power system stability; software packages; transmission networks; 400 kV; Electromagnetic Transient program; computer simulation; fast power swings; high-resistance earth fault detection; power system distance protection; relaying hardware; transmission system; Circuit faults; EMTP; Earth; Electrical fault detection; Fault detection; Hardware; Impedance; Power system relaying; Protection; Voltage;
Journal_Title :
Power Delivery, IEEE Transactions on
