Distance Protection of Series Compensated Transmission Line
Keywords:
distance protection; series compensation; PSCAD/EMTDC; voltage inversion; current inversionAbstract
In order to meet the high demand for power transmission capacity, some power companies have installed series
capacitor on power transmission line. This allows reduction in line impedance, thus resulting increased power transmission
capacity. The protective distance relays use impedance measurement in order to determine the location and presence of faults.
The introduction of the capacitance in series with the line reactance adds certain complexities. The paper presents series
compensated transmission line model by using PSCAD/EMTDC. Upon extensive testing on different data set of fault cases with
fault resistance and varying percentage compensation level, performance of the developed method ensures that the proposed
scheme gives the apparent effects on various system parameters by changing series compensation level.