Fault Location Algorithms for Electrical Power Transmission Lines

Electric power transmission lines are used for delivering electricity to consumers at their homes, offices and industries. It is important to ensure a smooth operation of transmission lines to deliver a minimally interrupted power supply making necessary for reliable operation of electrical power lines. This need has given rise to Fault Location detection techniques so that the economic impact of the fault situations can be mitigated and their correction can be rendered simpler and precise. This thesis report presents a comparison between two different approaches towards fault location detection with and without applying transmission line parameters. Firstly, an impedance based parameter dependent algorithm, derived by using the Modal Transformation theory and Discrete Fourier Transform is presented.The second algorithm is an improved parameter-independent fault location method where fault location will be determined from voltage and current phasors, measured at both line end terminals. This approach of fault detection does not require line parameters. The thesis report presents the results of the algorithms tested through the use of EMTP/ATPDraw, RTDS/RSCAD v2.025 and MATLAB. The results of the line parameter-independent algorithm will be compared with those provided by the parameter-dependent algorithm. Both algorithms are tested for the most common to occur asymmetrical faults with varying fault resistances. The results of the tests are then related to gauge the effectiveness and accuracy of these algorithms.Electrical Sustainable EnergyIntelligent Electrical Power GridsElectrical Engineering, Mathematics and Computer Scienc