CHAPTER 1 INTRODUCTION Fault location and correction are important in case of any power systems. This process has to be prompt and accurate so that system reliability can be improved, outage time can be reduced and restoration of system from fault can be accelerated. The traditional systems adopted for fault location are travelling-wave-based approach and impedance-measurement-based approach. The travelling-wave-based approach requires detection devices to connect to the high-voltage transmission line, making the solution complex and costly. And the impedance-measurement-based approach is highly dependent on the quality of the signal and affected by fault resistance, ground resistance and non-homogeneity in line configuration. Hence, these approaches may cause a location error that is unacceptable in certain operation cases. The new method of locating of fault utilizes the new technology of magneto sensors which are used for finding the fault in transmission lines. It is a low-cost highprecision solution, which does not need to connect the device to the HV transmission line and is highly sensitive for fault location. We all know that the fault is a condition causes abnormal flow of electric current. Faults are mainly two types: fault Symmetrical to ground fault e.g.; 3φ fault Unsymmetrical e.g.; L-G fault, L-L fault, L-L-G fault
CHAPTER 1 INTRODUCTION Fault location and correction are important in case of any power systems. This process has to be prompt and accurate so that system reliability can be improved, outage time can be reduced and restoration of system from fault can be accelerated. The traditional systems adopted for fault location are travelling-wave-based approach and impedance-measurement-based approach. The travelling-wave-based approach requires detection devices to connect to the high-voltage transmission line, making the solution complex and costly. And the impedance-measurement-based approach is highly dependent on the quality of the signal and affected by fault resistance, ground resistance and non-homogeneity in line configuration. Hence, these approaches may cause a location error that is unacceptable in certain operation cases. The new method of locating of fault utilizes the new technology of magneto sensors which are used for finding the fault in transmission lines. It is a low-cost highprecision solution, which does not need to connect the device to the HV transmission line and is highly sensitive for fault location. We all know that the fault is a condition causes abnormal flow of electric current. Faults are mainly two types: Symmetrical fault e.g.; 3φ to ground fault Unsymmetrical fault e.g.; L-G fault, L-L fault, L-L-G fault
260200154-Fault-Location-Doc.docx