Impact of Series Compensation Insertion in Double HV Transmission Line on the Settings of Distance Protection

This paper presents a study of the performance of distance protection relays when series compensation (SC) is inserted on double circuit transmission line high voltage (HV) 400 kV in Algeria (Group Sonelgaz). The relays setting for distance protection is considered as a great challenge to power system protection engineers. Special considerations on the transmission line impedance measurement are necessary in the application of distance protection. The studies also include different challenges which the protection engineer may face such as current and voltage inversion, non-linearity of the line impedance. A detailed modeling of SC is proposed and integrated in transmission system for five case studies in different point locations on transmission line. The proposed results dealing with distance relays protection setting are performed in MATLAB software environment, for different cases. Index Terms Distance protection, Double transmission line, High voltage, Fault, Relay, Series compensation. —————————— ——————————