Transmission lines are a vital part of power system and are prone to a variety of short-circuit faults. It is imperative to identify the fault location to restore the system as quickly as possible for maintaining the system integrity. Impedance-based fault location algorithms are most commonly used but they are prone to several sources of errors such as fault resistance and mutual coupling between the lines and may not provide accurate results in the presence of complex network configurations such as three-terminal lines. Though the information about mutual coupling or knowledge of complex network configuration is known

they cannot be directly used in impedance-based fault location algorithms. A novel automated generic framework for model-based fault location approach is proposed which uses the power system model to overcome the shortcomings of impedance-based fault location methods. A combination of power system simulation software and a control and processing software provide the flexibility to be able to incorporate all the available information about the system to accurately estimate the fault location. Furthermore

the key insights to implement the proposed framework in an effective and efficient manner are provided by using reduced equivalent circuits.