Title :
A new current differential protection scheme for Teed transmission lines
Author :
Gao, Houlei ; Crossley, Peter A.
Author_Institution :
Sch. of Electr. Eng., Shandong Univ., Jinan
Abstract :
This paper presents a current differential protection scheme for Teed transmission lines using superimposed components. Basing on the characteristics of the superimposed currents in Teed feeders, a unique differential criteria was proposed and analyzed under different operating conditions. This criteria inherently has sufficient sensitivity for internal faults and stability for external faults. Particularly, it copes well with both the internal high resistance faults on a heavily loaded feeder and the out-feeder problem. Extensive simulation studies were conducted on a typical EHV teed line model using EMTDC package. Theoretical analysis and simulation results demonstrates that the new differential scheme provides adequate reliability and fast operating response for a variety of system and fault conditions
Keywords :
power transmission faults; power transmission lines; power transmission protection; EMTDC package; Teed feeders; Teed transmission lines; current differential protection scheme; external faults stability; internal faults sensitivity; superimposed components; superimposed currents; typical EHV teed line model; Analytical models; EMTDC; Electric resistance; Environmental economics; Packaging; Reliability theory; Stability criteria; Substation protection; Transmission line theory; Transmission lines; Teed transmission lines; differential criteria; differential protection; superimposed components;
Conference_Titel :
Power Engineering Society General Meeting, 2006. IEEE
Conference_Location :
Montreal, Que.
Print_ISBN :
1-4244-0493-2
DOI :
10.1109/PES.2006.1709571
