Modified Single-Ended Fault Location Method for Single-phase-to-Ground Faults in T-Connected Line

T-connected transmission lines has increased for renewable energy connection with grid and load development. Due to the influence of transition resistance, system operation mode and other factors, the error of single ended fault location method is too large, especially when applied on T-Connected lines. The paper proposes modified single-ended fault location method, which based on one end electrical quantities and single ended fault location results at two other ends, to achieve accurate fault location. Simulation studies show that the method is correct and easy to be implemented in the field without the need to install new devices.