TY  - EJOU
AU  - Xie, Jia’an 
AU  - Wang, Yurong 
AU  - Jin, Guobin 
AU  - Wu, Mucheng 

TI  - T-Shaped Transmission Line Fault Location Based on Phase-Angle Jump Checking
T2  - Energy Engineering

PY  - 2022
VL  - 119
IS  - 5
SN  - 1546-0118

AB  - In order to effectively solve the dead-zone and low-precision of T-shaped transmission line fault location, a new T-shaped transmission line fault location algorithm based on phase-angle jump checking is proposed in this paper. Firstly, the 3-terminal synchronous fundamental positive sequence voltage and current phasors are extracted and substituted into the fault branch distance function to realize the selection of fault branch when the fault occurs; Secondly, use the condition of the fundamental positive sequence voltage phasor at the fault point is equal to calculate all roots (including real root and virtual roots); Finally, the phase-angle jump check function is used for checking calculation, and then the only real root can be determined as the actual fault distance, thereby achieving the purpose of high-precision fault location. MATLAB simulation results show that the proposed new algorithm is feasible and effective with high fault location accuracy and good versatility.
KW  - T-shaped transmission line; fault location; real root and virtual roots; phase-angle; jump check function

DO  - 10.32604/ee.2022.020344